Ransomes 07992-C Lawn Queen Owner's Manual

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: OWNER'S MANUAL and
PARTS LIST
FOR
21 Lawn Queen
— SERIAL No. 221-22,401 AND UP
Serial Number on Unit Must Be Given When Ordering Parts
ISSUED SEPTEMBER 1, 1951
JACOBSEN MANUFACTURING COMPANY
Racine, Wisconsin, U.S. A.
; Part No. 07992-C
IMPORTANT
Here is a service manual for your new JACOBSEN MOWER,
Since there is a right and wrong way to operate a power
mower, it 1s important that this manual be read carefully
before any grass cutting. ; This will avoid unnecessary
delays and. ‘expense which might be caused by improper
operation,
The various bearing surfaces in a new engine and mower
have not been glazed as they will be with continued
operation and it is in this Period of "RUNNING IN," that
care must be exercised.
READ INSTRUCTIONS CAREFULLY
A copy of this manual is shipped with each mower, All
points of operation and maintenance have been covered as
carefully as possible but if further information is re-
quired, write to the, |
SERVICE DEPARTMENT
JACOBSEN MFG, COMPANY
RACINE, WISCONSIN
ALWAYS GIVE SERIAL NUMBER OF UNIT,
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DIRECTIONS TO SET-UP MOWER
NOTE: Reference to right and left hand side of the mower is from the operator's position at the handle,
Carefully unpack mower and handle and assemble as follows:
1. TO ATTACH CLUTCH AND THROTTLE CONTROL BRACKET TO HANDLE
SPRING CLIP
BRACKET
THROTTLE
RIGHT SIDE
CLUTCH
LEFT SIDE
for the most convenient mowing the handle height must be adjusted
to the height of the operator. The cap screws on handle stops
are loosened. This allows handle to be held at desired height,
The cap screws are retightened securely. This adjustment must be
made each time the cutting height of the mower is changed.
Illustration No. 1
Use two screws and lockwashers provided to fasten bracket to
upper handle. Attach bracket *oóo side opposite welding. Assemble
handle to mower with bracket up. Attach spring clip as shown.
2. TO ATTACH HANDLE TO MOWER
Illustrations No. 2
1. Remove both handle stops fastened to side frames, by unscrew-
ing cap screws as shown. Slide stops over end of handle bail.
2. Attach right hand bail of handle to mower by placing end over
lug on inside of right frame.
3. To attach left hand side of handle bail the handle stop must
be pulled up high while the hole in the bail is sprung onto
the stud in the inside of left frame, See illustration for
this part.
4. Replace cap screws inside frames thru handle stops. Before
tightening screws read following paragraph.
3. TO ADJUST HANDLE HEIGHT
|
Illustration No, 3
Illustration No. 4
4. TO ATTACH CLUTCH ROD
1. Slide the end of clutch control rod through rubber grommet in
bracket and insert in shifting lever on mower from the top
side. Secure it by means of the spring, as follows: slide
looped end over rod, then with a pliers, slide straight end
through hole in rod. See illustration. This spring tension
keeps rod from rattling.
2. Pulling upward toward the operator with a firm rapid pull
will cause engagement and start the forward travel of the
mower,
5. THROTTLE HOUSING AND THROTTLE WIRE ATTACHMENT TO CARBURETOR
ae
| HOUSING |
Illustration No. 5
Throttle housing and throttle wire are correctly installed atan
factory. In case of removal or replacement re-install as follows:
1. Bring throttle housing under bail of handle and under clutch
shaft, then up vertically and connect wire to the throttle
lever, the hook entering from the front. It will be necessary
to loosen the screw holding the throttle lever and turn the
lever so that the hook enters easily without bending the wire.
2. Place the wire housing in the groove in the carburetor adapter
and clamp in place with the screw and washer. The end of the
housing should project 1-13/16 inches above the mounting clamp
or, 1/4 inch above the float bowl cover. If set at less than
this distance the throttle lever may contact the governor
link to the air vane when the lever is in its lowest position,
and thus interfere with governing at high speed.
3. With the button on the handle all the way in and the engine
not running, the carburetor throttle should be about half
open. If it isn't, correction can be made by slightly twist-
ing the lever at the point where the governor spring is at-
tached. Fill and replace air cleaner.
6. SPARK PLUG INSTALLATION
Screw spark plug furnished with gasket into cylinder head.
Attach black magneto wire to end of plug. See Illustration
No. 9. Check stop switch for correct contact with plug wire.
OPERATIONAL INFORMATION
abundant
The two stroke engine delivers smooth,
power and is extremely simple in design and орега-
“tion, The Jacobsen-built Lawn Queen engine requires
a minimum of attention and produces abundant power
at remarkable low crankshaft speed. Employs the
famous 2 stroke principle, tne same as used in
streamlined trains and ocean
The engine of your power lawn mower is the Jacobsen
pioneered single cylinder, two cycle, air cooled
engine, It has a" 2-inch bore by 1-1/2 inch stroke
is conservatively rated at 1,50 horsepower at
Ignition is furnished
and
3600 revolutions per minute,
by a high-tension flywheel type magneto and a 14-
The fuel system consists of engines of modern
liners, It delivers a power stroke with every revo-
This means a smooth uni-
lution of the crankshaft,
There are only 3 major moving
form flow of power,
millimeter spark plug.
a gravity type fuel tank, adjustable jet carburetor,
parts - piston, connecting rod, and crankshaft,
controlled by a hand throttle and mechanical gov-
and equipped with an oil bath air cleaner,
started manually by a built-in me-
furnished by
ernor,
The engine is
chanical pull starter, Lubrication is
mixing oil with the fuel,
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IMPORTANT
SERIAL NUMBER SHOWN ON THIS PLATE
MUST BE REPORTED WHEN ORDERING PARTS,
JACOBSEN MFG.CO. |
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CHASSIS LUBRICATION
Oil Bath Air Cleaner - Remove and clean thorough-
CHASSIS LUBRICATION F
Illustration No. 6. ner
; . ds , mower Ooperates under extremely dusty condition,
Apply a few drops of oil daily as indicated: Refill with oil used for motor to level indicated
A. Wheels - 0il cup in hubs. by arrow on the cleaner. Remove cleaner before .
B. Reel Bearings - oil cup in side frames. tipping mower back on handle or oil will run out, 07
C. Drive Shaft Bearing Brackets - oil cups.
D. Clutch Spool - Oil groove and cone.
E. Clutch pulley bushing - oil sparingly. AG. Starter Shaft Bushing - Ball oiler in Bracket,
2
ly after every thirty hours of use or oftener if
ENGINE LUBRICATION
The engine is lubricated by oil mixed with the gas-
oline in the ratio of one part oil to sixteen parts
gasoline, or one~half pint of oil per gallon of gaso-
line. The oil in the mixture is carried into the
crankcase and cylinder where it lubricates the pis-
ton, piston rings, connecting rod and main bearings.
The system is simple and virtually trouble proof. For
best results, use outboard motor or other non-deter-
gent oil of S. A. E. No. 30 viscosity. Your JACOBSEN
DEALER will gladly recommend a suitable brand that is
available in your locality.
1
Illustration No. 7
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To prepare proper fuel mixture, mix two (2) ounces of
(S.A.E. 30) oil to one quart of gasoline. For a
single filling use the two ounce oil measuring cup
furnished with the mower. Pour the two ounces of oil
into a quart of gasoline and stir thoroughly. Do not
attempt to pour the oil into the gasoline tank sepa-
‘rately. Mix the oil and gasoline together before
pouring into the fuel tank.
WE SUGGEST, HOWEVER, PREPARING A LARGER QUANTITY THAN
ABOVE MENTIONED AND RECOMMEND THE USE OF A FIVE
GALLON CAN, MIXING ONE QUART OIL TO FOUR GALLONS OF
GASOLINE. SHAKE CAN OR STIR CONTENTS BEFORE POURING
INTO FUEL TANK.
Under no condition add either oil or gasoline sep-
arately to the gasoline tank.
GRAVITY FEED FUEL SYSTEM
The fuel tank is located above the level of the car-
buretor and the fuel flows by gravity into the car-
buretor float bowl. A shut-off cock is provided at
the tank outlet; close this shut-off before removing
gas line whenever the fuel tank is removed. The
filler cap on the tank has a small vent hole. This
hole must be kept open or fuel will not flow into the
carburetor float bowl.
STARTING THE ENGINE
SHUT-OFF VALVE THROTTLE LEvER/
MOVE FORWARD TO CHOKE
®
LOAD MIX TURE SCREW
HIGH SPEED
Illustration No. 8
1. Disengage the clutch by pushing the control rod
down as far as it will go.
2. The mixture adjustments have been set properly at
the factory, and until tampered with, do not
need re-adjustment each time the engine is start-
ed. For carburetor adjustment instruction, see
page 16.
3. Set the throttle control on handle about half out.
4. Close the choke by moving the choke lever forward.
The choke lever is located near the left side of
the air cleaner.
5. Operate the starter by giving a slow pull on the
cable until the starter engages, then a quick
pull to turn the engine. If the engine doesn't
sstart after about two pulls, open the choke to
avoid flooding and reclose after about three more
pulls. The engine will normally start in one to
three pulls, so if many more are required it will
be well to look for trouble. When the engine
starts, open the choke half-way. Run engine for
2 to 3 minutes to warm up before opening the
choke completely.
CAUTION: Should mower be tipped. forward for any
reason when not running it is advisable to close the
fuel line valve and load mixture screw (high speed)
to prevent fuel draining into the engine. Take note
of the turns of the adjustment screw, so it can be
re-opened to the same position. >
FLOODED ENGINE
Overchoking the engine when starting will flood it,
This is particularly the case when starting a warm
engine. Proceed as follows to eliminate this diffi-
culty.
1. Close load range (high speed) mixture adjusting
screw, taking note of the turns so it can be re-
opened later to its previous position.
2. Crank engine. If it fails to start after a rea-
sonable amount of cranking remove the spark plug.
If the tip is wet, replace it with a clean and
dry spark plug.
3. Reset carburetor adjustment knob to operating
position after engine has started.
TO STOP ENGINE
To bring the engine to a complete stop, press the
steel cutout switch against the spark plug wire con-
nection,
Illustration No. 9
INSUFFICIENT FUEL
Failure to run over a few seconds after starting or
when load is applied usually indicates a lean car-
buretor adjustment. If this occurs immediately after
the motor starts and while it is still cold, move the
choke lever to partly closed position, If operation
without partial choking is not possible, see car-
buretor adjustment on page 16.
TOO MUCH FUEL
When the engine appears to misfire every alternate
revolution and lacks power, it is usually an indica-
tion that the carburetor is set too rich or the choke
is partly on. See that the choke lever is in the
REARWARD position. If the indications persist when
the choke is open, see carburetor adjustment direc-
tions on page 16, A slight amount of erratic missing
may occur when idling at no load, but this is a char-
acteristic of the engine, and will disappear when
load is applied. If erratic missing occurs under
load and adjusting the carburetor does not correct
it, the trouble is usually caused bya dirty or partly
fouled spark plug. For proper servicing, see motor
service instruction page.
SERVICE INFORMATION
STARTER
Removal of engine or magneto flywheel does not re-
quire disassembly of starter, Simply unscrew starter
bracket retaining bolts and remove complete assembly,
If flywheel is to come off, ball retainer must first
be removed from crankshaft, When starter assembly is
removed four steel balls will drop out of ball re-
tainer, When reattaching the starter assembly the
mower must be turned over on left wheel in order that
the balls will remain in the retainer sockets, Do
not oil balls or retainer grooves.
\ 00906 STARTER BALLS
E. TIP MOWER TC RE-INSTALL
Illustration No. 10
Illustration No, 11-A
7
STARTER GRIP
BUMPER
CABLE STUD
STARTER BRACKET
RETAINING SCREW
STARTER PULLEY
SECOND COIL
OF SPRING
FIRST COIL
OF SPRING
BAND “07290
Illustration No, 11-B
STARTER RECOIL SPRING
INSTRUCTIONS TO REPLACE THE STARTER RECOIL SPRING.
CAUTION READ CAREFULLY.
1. Remove the starter cable retaining screw from the
starter pulley.
2. Remove the starter cable from-the starter pulley.
To do this pull the cable out full length, then
push cable back until the cable retaining ball
comes out of the pulley groove. Pull starter
from starter bracket.
3. Remove nut and lock washer holding pulley on
shaft.
4, Tap lightly on inside of pulley to slide off
shaft.
5. Remove the old spring. Remove Band No. 07290
from old spring.
6. Apply grease to inner coils of new spring (Graph-
ite preferred).
7. Insert Band No. 07290 between first and second
coil of spring, pushing pin through spring eye
as shown in illustration.
8. Pry inner end of spring over starter bracket hub
and revolve spring to engage the pin in the hole
in the starter bracket,
9. Hook the outer end of the spring on the pulley
anchor pin, then wind the coil until it is small
enough to fit into the pulley flange,
10, Slide pulley on shaft and replace retaining.
lockwasher and nut.
INSTRUCTIONS FOR REPLACING STARTER
CABLE WITH BUMPER ATTACHED
1. Rotate the starter pulley, 3 and 1/2 turn CLOCK-
WISE AGAINST SPRING PRESSURE, hold pulley in this
position, thread ball end of starter cable
through the starter bracket, place ball in cable
groove and permit pulley to rotate gradually to
handle stop.
2. Replace the starter cable retaining screw and
lockwasher,
CLUTCH ADJUSTMENT
Bu
que
Illustration No. 13
Illustration No. 12
CLUTCH ADJUSTMENT
Should the clutch fail to hold properly after ex-
tended use it can be adjusted by loosening the
fillister head screw on the yoke and tap yoke to move
it slightly toward the pulley. Avoid moving yoke too
much as engagement of the clutch will be difficult.
Re-tighten screw on yoke to hold adjustment. Proper
adjustment will permit easy operation of the clutch
without any slippage existing.
BELT ADJUSTMENT & REPLACEMENT
If the take up of belt is required, loosen the three
engine base retaining bolts. Move complete assembly
of engine and starter forward until practically all
slack is eliminated. Be sure engine is lined up
parallel with cross shaft. Then re-tighten screws.
To REPLACE BELT--First remove the clutch throw-out
lever bracket assembly completely. Two screws and
nuts hold this to the base. Next remove {two screws
and nuts holding. left hand drive shaft bearing
bracket to base. Then loosen both nuts holding right
hand drive shaft bearing bracket to base. The new
belt can be slipped under left hand bearing bracket
over drive shaft and placed on clutch pulley and
engine pulley. Replace all parts and tighten nuts
firmly. It will be necessary to adjust tension of
belt as described in above paragraph or take-up of
belt,
CHAIN ADJUSTMENT
Illustration No. 14
CHAIN ADJUSTMENT
The tension of the link drive chain may need adjust-
ing after a long period of use. To compensate for
chain wear, first remove upper chain guard, then
loosen nuts holding engine deck mounting brace, to
deck plate and raise deck plate enough to take up
slack, Raise opposite side of deck plate equal amount
to level top of deck. Avoid tightening chain to the
limit for excessive wear will then develop.
CUTTING UNIT ADJUSTMENT
Illustration No. 15
To keep the mower at the best grass cutting effi-
ciency the reel and bed knife must be kept in correct
adjustment, This is done as follows: First loosen
the screws in the side plates about one turn. To
adjust bed knife loosen the fillister head screws
nearest the wood roller about one-quarter turn.
Revolve the reel by hand and at the same time tighten
the inner adjusting screws until the bed knife just
comes in contact with the reel, The adjustment
should be such that it is possible to cut a piece of
newspaper along the entire length of each reel blade.
When this adjustment is accomplished tighten screws
in the side plates to lock the bed knife in position, :
IT SHOULD BE POSSIBLE TO SPIN THE REEL BACKWARD BY
HAND AFTER MAKING THIS ADJUSTMENT,
GRASS CUTTING HEIGHT
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Illustration No. 16
The mower is set to a cutting height of 1-1/2" at the
factory, If it is mecessary to change this adjust-
ment loosen the nut on the outer side of each roller
bracket and reset as desired. Further range can be
provided by taking out the bracket retaining bolts
and replacing them in lower or higher holes, Mower
should be on a hard level surface when making the
adjustment so both brackets can be set for equal
height,
SHARPENING THE REEL
When grass cutting indicates that the reel requires
sharpening, this may be done without removing it from
the mower as follows:
Illustration No. 17
Tip mower back on rear roller so it rests on the
handle and block it in that position, First remove
oil air cleaner to prevent spilling oil.
Disconnect the drive chain by removing the connect-
ing link,
Make sure bed knife is in contact with real blades
along entire cutting width,
Turn the right hand wheel and at the same time apply
a mixture of emery and oil evenly along the entire
length of the reel, After the blades have become
lapped in this manner carefully wash off the emery
and oil from both the reel and bed knife, connect
chain and reset as explained in paragraph on bed
knife adjustment,
In the course of normal use the reel blades will be-
come worn to the point that regrinding is required,
The reel in that case may be sent to the factory for
exchange, or the mower can be taken to a competent
lawn mower shop for sharpening and resetting.
REEL BEARING ADJUSTMENT
BEARING
SPACER
Illustration No. 18
REEL BEARING ADJUSTMENT
Any end play that develops in the reel must be re-
moved. To adjust, loosen the Allen set screw in ad-
justing bearing spacer located on left hand end of
reel. See illustration: use 5/16 Allen wrench fur-
nished. Adjust bearing by turning screw in adjoining
end spider to the right until all end play is taken
out of bearings. If turned too far, reel will drag
and screw must be turned in the opposite direction.
THE REEL MUST BE ABLE TO SPIN FREELY. Lock adjust-
ment securely in this position by means of the set
screw in the collar. Then turn adjusting screw in
spider to the right until it sets firm against collar.
ENGINE SERVICE DIRECTIONS
CARBON IN ENGINE - Operating the engine with too rich
a fuel mixture or use of a poor grade of lubricating
oil will hasten carbon formation in cylinder exhaust
port holes, muffler and perhaps even cylinder intake
port holes. Carbon formation at any of these points
will reduce engine power considerably, and if left
uncleaned the engine will not run at all.
It is advisable to make a periodic check at the above
mentioned points. - Remove cylinder head and scrape
out carbon. The top of the piston should also be
cleaned off. Before reassembling cylinder head, turn
engine over until piston reaches bottom dead center.
The intake port holes can then be checked and any
carbon found, removed. To clean out exhaust ports
remove muffler and scrape out carbon with screw
driver or some similar tool.
MUFFLER CARE - After twenty-five hours of operation
the muffler should be removed for a thorough cleaning.
Remove nut at end of retaining screw that passes thru
muffler and elbow. Scrape and clean all carbon from
inside muffler. Remove muffler elbow and scrape in-
side clean. Reassemble elbow to cylinder and replace
muffler on elbow. Be sure both gaskets are in per-
fect condition. Draw studs and nut up tight to pre-
vent leakage.
CYLINDER HEAD - In replacing cylinder head be sure
the gasket is in place and in perfect condition.
Tighten the four nuts evenly so the head will not be
cracked. Make sure the head is sufficiently tight to
prevent compression leaks.
WHEN ENGINE FAILS TO START
If at any time the motor should fail to start, check
the following possibilities:
1. That there is at least one inch of gasoline in
the tank.
2. Damaged or dirty spark plug: remove the spark
plug. Lay it on the motor base with the high
tension wire connected and spin motor to check
spark. If no spark occurs at the points, clean
out plug or replace itwith a new one. The spark
plug points should have a gap of approximately
.035". When the mower is operated for prolonged
periods, the Champion J5 or JIll spark plug, fur-
nished as standard equipment, is recommended.
However, if insulator of plug shows a heavy oxide
coating and firing points wear rapidly, perfor-
mance of the engine will be affected by fading
out or loss of power after a comparatively short
period of running. In that case Champion J8 plug
or equivalent should be used.
3. Weak or intermittent spark: a weak spark is
generally due to improper adjustment of the mag-
neto points. Check point adjustment as in MAGNETO
ADJUSTMENT INSTRUCTIONS as furnished in a separate
sheet by the maker of the magneto.
4. Deposit in gasoline or carburetor: remove com-
plete carburetor assembly, wash thoroughly in
gasoline, and dry out. Be sure in assembling
that all points are perfectly tight and that
there are no gasket leaks. If the carburetor
fails to operate satisfactorily, send the com-
plete unit to the factory for repair and adjust-
ment.
CARBURETOR ADJUSTMENTS
See page No. 16.
MAGNETO
Read carefully the service instructions covering the
series FW flywheel magneto as furnished with these
instructions and issued by the Wico Electric Company
of Springfield, Massachusetts. That instruction
sheet contains a complete list of repair parts and
also covers adjustment, etc.
A complete list of Vico District Service representa-
tives who can service the magneto will be found on
the last page of the Wico Service Manual,
TO TIME MAGNETO
Remove the starter, flywheel housing, starter ball
retainer, and flywheel. Check the point opening
which should be .020". (Instructions for point ad-
justment will be found in Wico Service Manual.) Re-
move the spark plug. Turn the crankshaft forward
until the piston reaches top dead center. Insert a
clean screw driver or red through the spark plug hole
until it rests on the piston top. Scribe a line on
the rod, level with the top of the spark plug boss.
Scribe a second line 1/8" above the first. Turn the
crankshaft backward until the second line -is level
with the top of the spark plug hole.
Move the coil plate until points just begin to break,
Tighten plate in position by means of the two fil-
lister head screws. Recheck to determine if position
is 1/8" from top center when magneto points begin to
break. If the setting is exactly as described the
timing will be correct.
STORAGE INSTRUCTIONS
At the end of the season or if mowers are stored for
any length of time the fuel tank, fuel line and car-
buretor should be completely drained of fuel to pre-
vent gum deposits from forming on essential parts.
1. Remove fuel line at shut-off valve and drain tank
2. Start engine and run until carburetor is empty
and engine stops.
3. Replace fuel line.
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MOWER PARTS LIST
REF. PART REF. PART
NO. NO. QUAN. DESCRIPTION NO. NO. QUAN. DESCRIPTION
1 ¡A-1642-A! 2 ¡Tire and Wheel 40 105044 2 Traction Wheel Shaft Mtg. Nut
2 |A-1987 2 Reel Shaft Seal 41 105045 2 Handle Stop
3 A-1988 2 Traction Wheel 42 105049 1 R.H. Reel Guard
4 ¡A-2791 1 R.H. Side Frame 43 ¡05050 1 L.H. Reel Guard
5 {A-2792 1 L.H. Side Frame 44 [06761 2 Bed Knife Shoe Bushing
6 |A-3560 1 Throttle Control 45 |07587 1 Throttle Hsg. Mtg. Clip
7 |A-3829 1 Reel Shaft 46 [07985 1 Bed Knife
8 |A-3831 1 ¡Handle Less Grips 47 107987 1 ¡Rear Roller Shaft
9 |A-3832 1 Complete Reel 48 107988 1 Front Tie Rod
10 |1724-B 3 Center Spider 49 107989 3 Rear Roller
11 |2387-C 1 (R.H. Rear Roller Bracket 50 07991 5 ¡Reel Blade
12 |2388-C 1 L.H. Rear Roller Bracket ol 107602 4 (Bed Knife Adj. Screw Lock Spring
13 (2501 1 R.H. End Spider 52 |C-118 2 Screw, 5/16-18 x 1-1/4 Hex Hd. Cap
14 2502 1 |L.H. End Spider 53 1C-131 2 (Screw, 3/8-16 x 1 Hex Hd. Cap
15 2990 1 Bed Knife Shoe 54 |C-364 2 Screw, 1/2-20 x 3 Hex Hd. Cap
16 2943 1 L.H. Reel Shaft Pinion 55 |C-470 2 Nut, 1/4-20 Hex
17 12944 1 R.H. Reel Shaft Pinion 56 |C-514 2 Nut, 9/16 Hex Jamb
18 102711 AR |Shim for Bed Knife - .003 thick 57 |C-637 2 ¡Bolt, 5/16-18 x 1-1/4 Carriage
19 (02712 AR |Shim for Bed Knife - .007 thick 58 | C-1826 4 Screw, 1/4-20 x 1/2 Fil. Hd. Cap
20 104137-A 1 Clutch Rod Grommet 59 |C-2119 4 |Screw, 1/4-20 x 1/2 Rd. Hd. Cap
21 104257 1 |Knob for 04388 60 |C-2119-C | 7 |Screw, 1/4-20 x 1/2 Rd. Hd. Cap Plated
22 |04387-B 1 Reel Sprocket 61 | C-2553 2 \|Lockwasher, 3/16 No. 10 Type 11
23 104388 1 |Clutch Operating Rod 62 | C-2495 15 |Lockwasher, 1/4 x .109 x .062
24 104405 2 ¡Handle Grip 63 | C-2496 5 |Lockwasher, 5/16 x .125 x .078
25 104450-A 1 ¡Reel Shaft Spacer 64 | C-2497 2 \Lockwasher, 3/8 x .141 x .094
26 104451-A 1 Reel Bearing Adj. Collar 65 |C-2499 2 ¡Lockwasher, 1/2 x .171 x .125
27 104454 4 |Rear Roller Spacer Washer 66 | C-2500 2 \|Lockwasher, 9/16 x .188 x .141
28 104456 2 |Reel Shaft Pinion Pawl 67 | C-2241-CP 2 Stovebolt, 3/16 x 1 w/nut
29 104457 4 |Traction Wheel Bushing 68 | C-2571 4 |Lockwasher, 1/4 Type 12
30 104462 2 |Wheel Dust Seal - Felt 69 |C-2574 1 ¡Lockwasher, 3/8 Type 12
31 ¡08084 1 Clutch € Throttle Control Bracket 70 | C-2635 2 Pin, #2 x 1-1/4 Std. Taper
32 104471 2 Reel Bearing Cup 71 | C-3434 2 |Set Screw for 2388-C and 2387-C - 1/4-20 x 5/8
33 104472 2 Reel Bearing Cone Sg. Hd.
34 04556 1 ¡Clutch Rod Spring 72 ¡C-4180 35 |Rivet, 1/4 x 5/8 Rd. Hd. Iron - for Reel (35)
35 104571 4 Shoe Adjusting Screw 73 | C-4403 2 Washer, 5/16 Std. Wrot
36 |04714 2 |Rubber Tire - 10.5 x 1.75 74 | C-4430 2 (Washer, 3/8 Std. Iron
37 105040 1 ¡Lower Chain Guard 75 {C-4796 4 Oil Cup - Bowen #078
38 105042 2 Traction Wheel Shaft 76 ¡C-5025 1 Set Screw for 04451-A 5/16-24 x 1/4 Set
39 105043 2 Traction Wheel Retaining Washer 77 1C-5088 1 Screw - Reel Brg. Adj. 5/16-18 x 1 Set
AR - As Required.
ALWAYS GIVE SERIAL NUMBER WHEN ORDERING PARTS
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CLUTCH AND DRIVE PARTS LIST
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REF,
PART
REF,
PART
No. | NO, | QUAN. DESCRIPTION NO. | NO. QUAN. DESCRIPTION
1 |A-1612 1 [Clutch Pulley 34 | 07308 1 [Starter Grip Bumper
2 [A-1613 2 |Cross Shaft Bearing 35 | 07984 1 |Engine Mtg, Plate
3 |A-1631 1 Clutch Friction Disc 36 | С-115 2 Screw, 5/16-18 x 3/4 Hex Hd. Сар
4 |A-1990 1 Starter Ratchet & Washer 37 | C-116 7 |Screw, 5/16-18 x 7/8 Hex На. Сар
5 |A-2778 1 ¡Starter Mtg. Bracket & Bushing 38 | C-117 4 ¡Screw, 5/16-18 x 1 Hex Hd. Cap
6 |A-3616 1 |Cross Shaft w/Collars and Groove Pins 39 |C-121 2 Screw, 5/16-18 x 2 Hex Hd. Сар
7 12368 1 Clutch Adjusting Collar 40 | C-305 2 Screw, 5/16-24 x 3/4 Hex Hd, Cap
8 (2420 1 ¡Starter Cable Grip 41 | C-471 11 (Nut, 5/16-18
9 [2504 1 [Crankshaft Pulley 42 | C-472 4 Nut, 3/8-16
10 12506 1 Upper Chain Guard 43 | C-497 1 Nut, 5/16-18 Hex Jamb
11 [2752 1 [Starter Pulley 44 | C-512 1 (Nut, 7/16 SAE Hex Jamb
12 12878 1 Motor Base 45 | C-1847 1 Screw, 5/16-18 Fil, Hd, Cap
13 |03768 1 Reel Drive Chain - 48 links 46 | C-2110 1 Screw, 1/4-20 x 3/4 Rd. Hd. Cap
14 [04385 2 [Cross Shaft Collar 47 | C-2262 1 Bolt, 1/4-3/4 Rd. Hd. Stove
15 104386 1 Cross Shaft Sprocket 48 | C-2365 2 Cotter Pin, 1/16 x 1/2
16 {04389 1 Friction Disc 49 | C-2483 1 Lockwasher, 7/16 x .154 x .085
17 04390 2 Clutch Finger 50 | C-2495 2 Lockwasher, 1/4 x .109 x ,062
18 104391 2 ¡Clutch Finger Pin 51 | C-2496 17 |Lockwasher, 5/16 x ,125 x .078
19 ¡04392 1 ¡Clutch Pulley Bushing 52 | C-2497 4 |Lockwasher, 3/8 x .141 x ,094
20 |04393-A 1 V-Belt 53 | C-2528 1 Lockwasher, #8 x .055 x .040
21 104402 1 Clutch Sleeve 54 | C-2648 l Pin for 04368 No, 3 x 1” Std. Taper
22 104406 2 Cross Shaft Bushing 55 | C-3294 1 Screw, 5/16-18 x 5/16 Allen Set
23 |04419 1 |Clutch Lever Bracket 56 | C-3942 1 #3 Woodruff Key
24 |04420-A 1 |Clutch Shifting Lever 57 | C-3946 1 #7 Woodruff Key
25 104704 1 Starter Ratchet Shaft Bushing 58 | C-3948 1 #9 Woodruff Key
26 104979 1 Starter Clutch Ball Retainer 59 | C-4354-T 3 Rivet, 1/8 Dia, x 1/4 Brass
27 105048 1 Clutch Shifting Lever Spring 60 | C-4474 4 Ball - Starter Ratchet, 9/32" Dia.
28 106748 1 Starter Pull Cable 61 | C-4796 3 10il Cup, Bowen #078
29 106760 1 ¡Starter Recoil Spring 62 | C-4799 1 ¡Bowen #56 Oiler
30 106792 1 Spring Retainer Washer 63 | C-4872 2 Pin, #2 x 1" Type 1 Groove
31 107183 1 Spacer - Deck Plate Brace 64 | C-4960 3 5/16" S,A.E. Wrot Washer
32 {07290 1 Starter Spring Mtg. Band 65 | C-4982 1 {Chain Link
33 [07292 2 |Brace - Deck Plate Mtg. 66 | C-5608 1 |Screw, 8-32 x 9/16 Rd, Hd, Machine
ALWAYS GIVE SERIAL NUMBER WHEN ORDERING PARTS
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- CARBURE TOR-
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SEE PAGES 14815
12
ENGINE PARTS LIST
EL
(
REF, PART REF, PART |
NO. NO. QUAN, DESCRIPTION NO. NO. QUAN. DESCRIPTION
1 ¡A-2319-A! 1 |Crankcase 36 |04557 1 | Spark Plug Guard
2 |A-2738 1 Cylinder with Studs 37 ¡05218 1 |Muffler Mtg. Gasket
3 |A-2740-B 1 Crankshaft 38 [05818 1 Intake Passage Cover
4 | A-2742 1 |Fan Housing 39 05819 1 Intake Passage Cover Gasket
5 |A-2797 1 |Governor Vane 40 |05821-A 1 ¡Exhaust Flange Gasket
6 |A-3889 1 Magneto Coil Plate 41 106744 4 Cylinder Hd, Mtg. Stud
7 |A-2962 1 Magneto Cable Assembly 42 |06744 1 |Muffler Hd, Mtg. Stud (Short)
8 |A-3528 1 Fuel Tank Cap 43 106745 1 ¡Muffler Hd, Mtg. Stud (Long)
9 | A-3322 1 |Fuel Line Shut-Off 44 |06749 l Muffler Body
10 | A-3562 1 Fuel Line 45 107574 1 Governor Link
11 | A-3565 1 |Fuel Tank 47 |07584 2 |Retaining Ring
12 ¡A-3566 1 Connecting Rod 48 | C-114 2 |8сгем, 5/16-18 x 5/8 Hex. Hd. Cap
13 |A-3618 1 |Piston w/Rings - Pin and Retaining Rings 49 |C-115 3 |Screw, 5/16-18 x 3/4 Hex, Hd. Cap
14 |2359-В 3 | Piston Rings 50 |C-118 4 |Screw, 5/16-18 x 1-1/4 Hex, Hd. Сар
15 |2562-В 1 | Fan Housing Back Plate ol 1C-484 10 ¡Nut, 5/16-24 Hex.
16 | 2605-A 1 {Cylinder Head 52 | C-848 6 |Screw, 6-32 x 5/16 Rd. Hd. Mach,
17 12747 1 ¡Muffler Head 53 | C-864 1 ¡Screw, 8-32 x 1/4 Rd. Hd, Mach.
18 |! 3007 1 | Flywheel 54 | C-913 3 | Screw, 10-24 x 5/16 Rd, Hd. Mach.
19 | 2890 1 | Oil Measuring Cup 20 | C-1614 4 | Screw, 12-24 x 5/8 Fil. Hd. Mach.
20 | 2939 1 | Crankcase Head 56 | C-1831 2 {Screw, 1/4-20 x 7/8 Fil. Hd. Cap
21 | 03159 1 | Ignition Cable Clip 27 | С-2495 4 |Lockwasher, 1/4" x .109 х .062
22 | 03301 2 Connecting Rod Screw 58 | C-2496 11 Lockwasher, 5/16 x ,125 x ,078
23 | 03318 4 | Cylinder Mtg. Stud 59 | C-2498 1 | Lockwasher, 7/16 x ,156 x ,109
24 | 03322 1 {Cylinder Mtg. Gasket 60 | C-2530 6 | Lockwasher, #12 x ,070 x ,056
25 | 03566 2 | Crankshaft Bearing 61 | C-2535 6 |Lockwasher, #6 x .055 x ,040
26 | 08102 1 | Magneto Cam Spring Washer 62 | C-2553 3 | Lockwasher, #10 Type #11 Shakeproof
27 | 04060 1 Carburetor Gasket 63 | C-2557 4 | Lockwasher, 5/16 Type 11
28 | 04093 1 Spark Cut-out Switch 64 | C-2568 1 Lockwasher, #8 Type 12
29 | 08103 1 | Magneto Cam 65 | 08101 1 | Magneto Key
30 | 04371-A 1 Cylinder Head Gasket 66 | C-4432 1 | Washer, 5/16
31 | 04377 1 | Crankcase Head Gasket 67 | C-4831 1 ¡Allen Wrench - 5/16"
32 | 04378 1 | Fan Housing Back Plate Gasket 68 | C-5000 1 | Screw, #14 x 3/8 P-K Drive
33 | 04399 2 | Crankshaft 0il Seal 69 | C-5468 2 | Lockwasher, 1/4 Type - 4014 E.I.T.
34 | 04425 1 |] Spark Plug Champion J11 70 | C-1826 2 | Screw, 1/4-20 x 1/2" Fill. Hd, Cap
35 | 04455 1 | Governor Vane Mtg. Pin 71 | C-5632 +} | Screw, 1/4-20 x 7-3/4 Hex. Hd. Mach.
ALWAYS GIVE SERIAL NUMBER WHEN ORDERING PARTS
Cn me ea oF LE tbl rei + ©
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CARBURETOR PARTS LIST
¢
ST
CARBURETOR AND ADAPTER PARTS LIST
fet rant Quan. Description Ret No Quan. Description
1 | A-3561 1 | Carburetor Assembly 30 | T08658* 1 |Float Bowl Cover Gasket
2 | 2938 1 | Carburetor Adapter 31 | T08765* 1 |Idle Adjustment Screw
3 | 2942 1 | Carburetor Air Cleaner Elbow 32 | TO8781 1 {Throttle Shutter
4 | 04049-A 1 Reed Valve 33 | T08793* 1 Adjusting Screw Spring
5 | 04050 1 | Reed Valve Clamp 34 | T08796* 1 |Float Pinion Pin
6 | 06781 1 90 degree Elbow 35 | TOBBOS* 1 {Choke Friction Spring
7 | 07433 1 | Air Cleaner 36 | T08875* 1 |By-pass Tube Assembly
8 | 07572 1 | Carburetor Mtg. Gasket 37 | T08913 1 |Throttle Stop Lever
9 | 07573 1 | Throttle Lever Bushing 38 | T08919* 1 |Nozzle
10 | 07575 1 | Governor Spring 39 | T08925: 1 Throttle Shaft Assembly
11 | 07576 1 | Throttle Lever Link 40 | Т08942* 2 |Screw and Washer, 4-40 x 1/4 Rd. Hd. Mach.
12 | 07577 1 | Throttle Lever 41 | TO9145+* 1 |Matched Inlet Needle w/Spring and Seat
13 | 07684 1 | Gasket - Elbow to Carburetor with Washer
14 | 07685 1 Vibration Dampener - Gov. Spring 42 | T07972+ 1 {Needle Valve Adj. Screw Complete
15 | T0705 1 | Packing 43 | T08921 1 [Choke Shaft and Lever
16 | T0788* 1 | Spring 44 | T08952 1 |Repair Parts Kit (w/Gaskets)
17 | T02405 1 | Choke Shutter 45 | C-470 2 |Hex. Nut, 1/4-20
18 | T02531* 1 | Welch Plug 46 | C-571-C 1 |Std. Wing Nut, 10-24
19 | T05095* 1 | Screw, 8-32 x 9/16 Fill, Hd. 47 | C-873 2 | Screw, 8-32 x 1-3/4 Rd. Hd. Mach.
20 | T05454* 1 | Choke Friction Plunger 48 | C-1832 2 Screw, 1/4-20 x 1 Fil. Hd. Cap.
21 | TO6076% 1 | Gasket 49 | C-2494 2 | Lockwasher, 1/4" - 1/16 x 1/16
22 | T06393* 1 Screw, 4-36 x 1/4 Rd. Hd. Mach. 50 | C-2528 2 | Lockwasher, #8 x .055 x .040
23 | T06396* 1 | #4 Lockwasher 51 | C-4415 2 | Washers, 3/16"
24 | T07282 1 | Packing Nut 52 | C-5463 1 | Shakeproof Lockwasher
25 | T07283* 1 Inlet Screen 53 | C-5631-C 1 | Stove Bolt, 10-24 x 5-1/2 Rd. Hd.
26 | TO8315 3 | Screw and Lockwasher, 8-32 x 1/2 54 | C-6274 1 | Sems Screw, 6-32 x 1/4 Rd, Hd.
27 | T08928 1 | Carburetor Body 55 | C-6275 2 | Sems Screw, 6-32 x 5/16 Rd. Hd.
28 | T08950 1 | Float Bowl Cover 56 | C-6587 2 Sems Screw, 10-24 x 1/2 Rd. Hd.
29 | T08656 1 | Float and Lever Assembly 57 | 08401 1 | Governor Linkage Spring
Note (*) indicates contents of designated Repair Parts Kit.
ALWAYS GIVE SERIAL NUMBER WHEN ORDERING PARTS
HIGH SPEED AND FULL POWER:
CARBURETOR INSTRUCTIONS
3/32 DIA. GAUGE PIN
FLOAT LEVER _—
FLOAT LEVEL SETTING
CARBURETOR
The engine is equipped with a carburetor of latest
design for proper air-fuel mixture at all speeds and
loads. It has. three separate adjustments, i.e,,
idling speed, -and load range mixture. The effect of
air cleaner restriction on mixtures is minimized by
venting the float bowl and other
the air inlet tube.
OPERATION: A sectional view of the carburetor
in diagrammatic form is shown above. Fuel enters
carburetor at inlet connection (E) flowing past inlet
needle and seat (D) into the fuel bowl until the fuel
level (C) is reached. Float (A) controls the level,
In reaching its level, the fuel flows from the float
bowl past the main fuel adjustment orifice (U), and
load range screw (R), then into and around the main
nozzle (5) and idle tube (H) to the same level as (©.
IDLE AND LOW SPEEDS: Crankcase vacuum, or suction at
closed or slightly opened throttle, draws this fuel
up the idle tube (H) past the adjustment orifice (J)
where it is mixed with air from the air bleed channel
(G). This fuel-air mixture is drawn through the dis-
charge ports (M) where it mixes with additional air
passing throttle shutter (N) before entering crank-
case. The front port only works at slow idle and
both ports at fast idle. Idle mixture screw (L) con-
trols the fuel quantity. Idle speed screw (0) con-
trols mixture quantity for minimum idling speed.
When throttle shutter (N)
is opened under engine load, lowered suction reduces
mixture through ports (M) and increases air flow
through ‘venturi (Q), creating suction at main dis-
charge jet (P). This suction draws fuel up along the
outside of the main nozzle tube (8) and through port
(P). Fuel flow from the bowl due to the combined
action of fuel level and suction is controlled by
main mixture adjusting screw (R). Air is automatic-
ally bled through channel (F), the main nozzle top
slots, and the nozzle side holes tomix with the fuel,
thus giving the proper air-fuel mixture for the par-
ticular load, :
CARBURETOR ADJUSTMENT INSTRUCTIONS
The carburetor is normally adjusted properly .at the
factory, but may require readjusting in cases of
cleaning or tampering. Separate adjustments are pro-
vided. Power range screw (R) should be set initially
at one turn open (counter-clockwise) from the seating
(without forcing). The idle mixture screw (L) should
‘be set initially at 3/4 turns open from seating. Now
choke and start engine in the usual manner and run
until warm.
POWER RANGE ADJUSTMENT: This can be made best by
noting operation and acceleration under load, bearing
in mind that flatness can be caused by both too rich
bleed channels to,
16
and too lean a mixture, An approximate adjustment
can be made by holding throttle shutter 1/4 to 1/2
open (to give a speed equal to maximum governed
speed), then slowly turn screw (R) inward until en-
gine speed drops, and reopen about 1/4 turn. This
adjustment is not critical, and a slightly rich set-
ting will aid lubrication at heavy loads.
IDLE ADJUSTMENT: This is to be made after the power
range adjustment. Turn in idle speed screw (0) with
throttle shaft top lever held in the closed position
against screw end until engine is slightly above de-
sired idling speed. Hold shutter (N) closed tc pre-
vent governor action during entire idle adjusting
period. Next, slowly turn idle mixture screw (L)
inward (lean) until engine loses speed, then outward
aboyt 1/8 turn. Now, slowly, back out idle speed
screw (0) to desired idling speed and reset screw (0)
if necessary. When the handle throttle control is in
the idling position, the throttle shaft lever should
ride against the idle speed screw (0) and not open
and close under’ governor action. If governor action
occurs at idle, reduce governor spring pull by
slightly shifting the throttle wire housing or bend-
ing the coil end of the governor spring. An exces-
sively lean idle mixture setting will cause speed
surges under governor control at fast idle. Air
leakage through worn crankshaft seals can affect
idling and light load operation; therefore, seals
should be replaced if servicing of carburetor, mag-
neto, and spark plug fail to produce proper running.
FLOAT LEVEL SETTING: To check for proper float level
setting turn the cover of the float bowl exactly up-
side down so that the float is on top. Next, with
the float resting on the spring, slide the 3/32"
diameter gauge pin across the cover of the float bowl
and underneath the float as shown at B above. The
tension of the needle spring should hold the float
at a level just high enough to clear the 3/32" gauge. -
If the float does not touch the gauge pin, bend the
arm up that contacts the float needle spring. If the
float is too low, bend the arm down.
CARBURETOR MAINTENANCE: To disassembly carburetor,
remove the following parts: float bowl cover assem-
bly, main and idle adjusting screws, idle tube, and
main nozzle and gasket, Wash body and parts in gaso-
line or other recommended cleaning fluid and blow out
passages with air. If necessary, remove welch plug
over the idle ports (M) to be certain that they are
not partially plugged, then tightly install a new
welch plug. Inspect and replace worn parts and gas-
kets, A repair parts kit (including gaskets) is
available and listed under carburetor parts.
In reassembling, follow the reverse order of disassem-
bling. Carefully and tightly install nozzle (8),
idle tube (H), and inlet seat D). Check float level
and see that it moves freely.
INSTRUCTION FOR ORDERING PARTS
To eliminate error and speed de-
livery:
l. Write your name and address
on the order plainly.
2. Explain where and how to ship.
3. GIVE THE SERIAL NUMBER AS
STAMPED ON THE NAME PLATE OF
YOUR POWER UNIT.
4. Send the order to your dealer,
to the nearest authorized
service station as shown in
the accompanying Service Sta-
tion Directory, or to us.
TERMS ON
It is our policy to ship all orders
for repair parts on a C.0.D. basis.
Repair parts prices have been kept
as low as possible and it is neces-
sary to eliminate the cost of fol-
lowing up collection of thousands
5. Inspect all shipments on re-
ceipt. If any parts are
damaged or missing, file a
claim with the carrier before
accepting.
6. Do not return material to us
or to an authorized service
station without a letter of
explanation. Make a list of
all returned parts, show your
name and address, and include
it with the shipment. Trans-
portation charges must be
prepaid on shipments to us or
to an authorized service sta-
tion.
REPATR PARTS
of small accounts. No one wants to
pay more for this unnecessary bur-
den and we hope that our customers
will not accept a C.0.D. shipment
as any reflection on their credit
standing.
Parts prices are subject to change without notice.
All prices are F.0.B. factory Racine, Wisconsin.
WARRANTY
Jacobsen Products are guaranteed to
the original retail purchaser {for
ninety (90) days from date of pur-
chase. The Jacobsen Manufacturing
Company will replace free of charge
f.o.b. Racine, Wisconsin, or author-
ized service station, any part found
by the Company to be defective when
returned for inspection, transpor-
tation charges prepaid.
The warranty will not apply to any
products repaired or altered out-
side of our factory or any author-
ized service station which, in the
Company's judgment, affects its
condition or operation. Neither
will the warranty apply to any
failures resulting from the misuse,
negligence, or accident.
The Company also reserves the right
to incorporate any changes in de-
sign without obligation to make
these changes on units previously
sold.
JACOBSEN MANUFACTURING COMPANY
Jacobsen Products are manufactured
and sold under the following United
States Patents:
2104719 2274487 2401611 2464175
2177628 2283269 2428924 2530732
2248764 2286419 2438669 2530733
2258061 2325252 2450849
2264118 2397457