EC01

EH11

EH12

EH15

EH17

EH21

EH25

EH30

EH30V

EH34

EH34V

EH43V

EY08

EY15

EY 15V

EY20

EY2OV

EY23

EY28

EY3

5

EY40

EY45V

EY2

1

EY44

EY 18-3

-

EY25

EY27

ROBIN

AMERICA, INC.

ROBIN TO WISCONSIN

ROBIN

ENGINE MODEL CROSS REFERENCE LIST

ROBIN

WISCONSIN

ROBIN

SIDE

VALVE

W 1-080

W1-145

W1-145V

W1-185

W1-185V

W1-230

W 1-280

W

1-340

W 1-390

Wl-45OV

EY21W

EY44W

EY18-3W

EY25W

EY27W

OVERHEAD

VALVE

WO1-115 wo1-120

WO1-150

WO1-170 wo1-210

WOl-250

WO 1-300

WO1-300V

WO1-340

WO

1 -340V

TWO CYCLE

EC13V

WT1-125V

DIESEL

DY23

DY27

DY30

DY3 5

DY4 1

WRD

1-230

WRD

1-270

-1-300

WRD1-350

WRD1-410

0

0

0

CONTENTS

Section Title

Page

1

.

SPECIFICATIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

.

PEFORMANCE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2

2 - 1

MaximumOutput

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2

.

FEATURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2

4

.

DISASSEMBLY and REASSEMBLY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

4 - 1

4 - 2

Preparation and Suggestions

Disassembly Procedures

4 - 3 Reassembly Procedures

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

5

.

CARBURETOR ADJUSTMENT

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

6

.

OPERATION

of

DIAPHRAGM CARBURETOR

. . . . . . . . . . . . . . . . . . . . .

8

7

.

TROUBLE-SHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

7 - 1

Starting Difficulties

7 - 2 Overheating

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

7-3

Power Drop

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

7 - 4

Excessive Fuel Consumption

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

7 - 5 Engine Hunting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

7 - 6 Other Complaints

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

8

.

CHECKS

and

CORRECTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

9

.

TABLE

of

CORRECTION STANDARDS

. . . . . . . . . . . . . . . . . . . . . . . . . .

12

10

.

MAINTENANCE and STORING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

1 0 - 1 Daily Checks and Maintenance

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

10-2 Every

50

Hours Checks and Maintenance

. . . . . . . . . . . . . . . . . . . . . .

13

10-3 Every 150 Hours Checks and Maintenance

10-4 Yearly Checks and Maintenance

. . . . . . . . . . . . . . . . . . . . .

13

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

10-

5

Preparation for Long Abeyance

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

SPARK PLUG

A I R C L E A N E R

P R I M E R PUMP

RECOIL STARTER-

M U F F L E R

1. SPECIFICATIONS

Ignition System

Model

Bore x Stroke (in)

Piston Displacement (cu. in)

Output Max.

Direction of Rotation

Lubrication

Lubricant

Carburetor

Fuel

Fuel Feed System

Fuel Tank Capacity

Spark Plug

Starting Method

Dry

Weight (Ibs.)

Dimensions (in)

I

I

I

I

Horizontal Draft Diaphragm Type

Gasoline-Oil Mixing Type

Solid State Ignition

ECOl

R

Air-Cooled, 2-Cycle, Single Cylinder, Horizontal P.T.O. Shaft

15.4 cc (0.94)

Counter-clockwise, viewed from driving shaft (P.T.O. shaft) side

Forced Air Cooling Cooling System

2-Cycle engine Oil only

Gasoline-Oil Mixture (20

-

2 5 : 1 )

Diaphragm Pump Type

Approx.

0.4

liter (0.1 1

U.S. gal.)

N G K B M - 7 A

Recoil Starter

1.8 kg (4.0)

1 3 8 m m x 1 7 0 mm (6.7) width

x 225 mm (8.9) height

- 1 -

2. PERFORMANCE

2-1 MAXIMUM OUTPUT

The maximum output of the ECOlR

is

such standard power as developed by the engine, after its run-in period with all the moving parts properly break-in, when operating with the fully open throttle valve. Therefore, it follows that a new engine may not develop this maximum output in the beginning, because moving parts are not in

a

properly break-in condition.

PERFORMANCE CURVE

MODEL ECOl

I

I

I

MAXIMUM TORQUE--/

I

I

I I

7

5

4 kg-crn

0

0.5

0.4

0.3

0.2

3000 4000

5000

REVOLUTION r.p.rn.

3.

FEATURES

1.

COMPACT, LIGHT WEIGHT, HIGH PERFORMANCE

and LOW FUEL CONSUMPTION

2.

3.

4.

TROUBLE FREE because of simple design and easy to handle

HIGH DURABILITY engine withstand long severe operation

TILTED OPERATION AVAILALBE

5.

Be able

to

operate at any

EASY STARTING

with

recoil starter

6 .

B d main bearings at both ends

7. a.

Forged steel connecting rod.

With CHROME PLATED CYLINDER, HEAT CONDUCTIVITY and WEAR PROOF are quite excellent.

,

4. DISASSEMBLY

and

REASSEMBLY

PREPARATION and

SUGGESTIONS

When disassembling the engine, memorize the locations of individual parts so as to be able to reassemble them correct- ly. Tag parts if there is a possibility of confusion.

Prepare several boxes to keep parts belonging

to

certain groups together.

Group those parts related each other, tentatively assembling where they belong, immediately after removing, in order to prevent missing and misplacing.

Handle the disassembled parts carefully and wash them in kerosene.

Use the correct tools

in

the correct way.

Standard tools required for disassembling and reassembling: a. Work table b. Washing pan c. Disassembling tools d. Washing oil (kerosene or gasoline), 2 cycle-oil e. Emery paper, cloth

Before starting to disassemble the engine, drain fuel.

Use new packings and gaskets

in

reassembly.

Immediately before assembling parts, wash them in fresh gasoline or kerosene and blow them dry.

Apply 2 cycle-oil on rotating and sliding parts.

Tighten bolts, nuts and screws with proper torque according to their sizes. If small screws are tightened too tight, they may get broken.

After completely assembling the engine, turn it by hand and check if there is any abnormality or loose members.

- 3 -

4 - 2 DISASSEMBLY PROCEDURES

4-2-1 FUEL DRAIN

Drain fuel from the fuel tank.

4-2-2 THROTTLE WIRE

(See Fig. 1.)

Remove throttle wire from carburetor.

4 - 2 - 5 K I L L SWITCH WIRE

Disconnect stop switch wire terminal.

4 - 2 - 6 MAGNETO FLYWHEEL (See Fig. 3.)

After loosening the nut, Iightly tap the center bolt and pull out the flywheel from the crankshaft. i

I

Fig. 1

4 - 2 - 3 RECOIL STARTER and FUN COVER

Remove recoil starter and

fun

cover by unscrewing bolts.

4 - 2 - 4 FUEL TANK and RUBBER TUBE

1) Disconnect fuel pipe between fuel tank and carbure- tor at carburetor side and remove fuel tank.

2)

After removing fuel pump, push the head of rubber tube toward arrow mark in Fig. 2 with a screwdriver of minus top @referably not sharpened) and remove rubber tube.

CAUTION:

Never remove rubber tube except at replacement.

Be sure to replace with new one when removed.

Be careful not to damage the hole in which rubber tube will be inserted.

Fig. 3

4 - 2 - 7 CARBURETOR and HEAT BLOCK

(See Fig.

4.)

Remove the cleaner cover first and then the cleaner body, carburetor, and heat block by loosening the screws.

Fig. 4

NOTE: When reassembling, pay attention to the choke lever facing. (See Fig. 5.)

/"

,

Fig. 2

Fig. 5

- 4 -

I

4-2-8 MUFFLER

Remove muffler from cylinder by loosening screws.

4 - 2 - 9 CYLINDER

(See Fig. 6 . )

Remove cylinder carefully so as not to damage sliding sur- faces of cylinder

and

piston.

,-

I

4 - 3 REASSEMBLY PROCEDURES

4 - 3 - 1 CRANKCASE

(See Fig.

8.)

1)

Insert crankshaft into front crankcase bearing.

2) Assemble crankcases.

3) Use new gasket.

4)

Tighten bolts to

40-50

kg-cm(2.9-3.6 ft-1b)torque.

5)

Cut

off

crankcase gaskets stuck out to the mating sur- face of cylinder.

-

FRONT CRANKCASE REAR CRANKCASE

j

.

4 - 2 - 1 0 DIVISION of CRANKCASE

(See Fig, 7)

After loosening bolts, disassemble front and rear crankcase.

Also,

crankshaft by tapping with a

soft

hammer. Washing crankcase with gasoline, apply the film of oil to crankcase ball bearing bore

and

grease to oil seal bore.

REAR CRANKCASE

Fig. 8

4-3-2 CYLINDER

(See Fig. 9.)

Replace cylinder gasket with new one. At the same time, try to mate the tappet hole with the groove on the contact surface of crankcase,

CAUTION:

,

Take care that gasket is placed in right position and on right side.

In assembling cylinder, take care of the position of piston ring and cylinder.

Tighten bolts to

40-50

kg-cm (2.9-3.6 ft-lb).

FRONT CRANKCASE CRANKSHAFT

Fig. 7

-5-

4 - 3 - 3 CARBURETOR and HEAT BLOCK

1) Use new gasket.

2) Tighten bolts to

40-50

kg-cm (2.9-3.6 ft-lb).

4-3-4 IGNITION COIL

Tighten ignition coil tentatively, putting

high

tension wire on the right side.

4 - 3 - 5 FLYWHEEL

Mount flywheel on crankshaft and tighten flywheel nut.

Flywheel tightening torque is 120-140 kg-cm (8.6-10.1 ft- lb).

4 - 3 - 6 I G N I T I O N C O I L

(See Fig. 10.)

Tighten ignition coil, keeping a clearance of 0.4-0.6 mm from flywheel.

Tightening torque:

40-50

kg-cm (2.9-3.6 ft-lb).

4 - 3 - 8 RUBBER TUBE in

FUEL TANK

Insert the rubber tube from the end of felt side into the hole of fuel tank. Put the spacer or backing plate between vice and fuel tank as shown in the figures.

Completely put in the ridge of rubber tube. After inserting, pinch the outer side of rubber tube and turn it to assure that the ridge has been completely inserted.

CAUTION:

After inserting, confirm the insertion of the ridge of rubber tube.

IGNITION COIL FLYWHEEL

,

Fig.

10

4 - 3 - 7 MUFFLER

Tighten muffler 40-50 kg-cm (2.9-3.6 ft-lb).

Use new gasket.

- 6 -

Fig.

1 1

4 - 3 - 9 RECOIL STARTER, FAN COVER, FUEL TANK, and GROMMET

Run high tension cord through the grommet and assemble plug cap spring and plug cap. Put the fuel tank in the crank- case. Run the grommet through the groove of fan cover and tighten recoil starter and fan cover to crankcase with three screws. Connect fuel line t o carburetor.

Tool: Plus driver, Torque wrench

4 - 3 - 1 0 SPARK PLUG and CYLINDER COVER

Tighten the cylinder cover with spark plug.

Tightening torque: 150-200 kg-cm (10.8-14.4 ft-lb)

5.

CARBURETOR ADJUSTMENT

If adjustment is required;

Idle adjustment (See Fig. 12)

Adjust throttle stop screw. If turn throttle stop screw toward clockwise, revolution will increase. If turn it toward counterclockwise, revolution will reduce.

CAUTION:

Do not idle under

2,800

Fuel flow adjustment

(See

Fig. 12) a. At low speed (at the small opening of the throttle):

When fuel is too

RICH,

turn the low speed fuel ad- justing screw to the RIGHT. When it is too

LEAN,

turn low speed fuel adjusting screw to the LEFT.

b.

At

high

speed (at the large opening of the throttle):

W h e n

fuel is too

RICH,

turn

high

fuel adjusting screw to the

RIGHT.

L E A N ,

high

speed fuel adjusting screw to the LEFT.

Fig. 12

- 7 -

6. OPERATION OF DIAPHRAGM CARBURETOR

When the engine runs, positive pressure and negative pressure will alternately occur in the crankcase. This alternation in pressure is led to the reverse side of fuel pump diaphragm

so

that the top side

will

work as fuel pump.

The fuel drawn u p by fuel pump enters pressure compensating diaphragm chamber through the felt, rubber tube in fuel tank, fuel pipe and needle valve.

The fuel in pressure compensating laphragm chamber is sent by pressure,

so

that the fuel pressure becomes higher than atmospheric pressure and pushes down the pressure compensating diaphragm.

When the pressure Compensating diaphragm is pushed downwards, the arm connected t o needle valve turns by the strength

of

spring and pushes up the needle valve, which shuts out the supply

of

fuel.

The fuel in pressure compensating diaphragm chamber is measured by high speed fuel adjusting screw and low speed fuel adjusting screw, entering the engine through the carb venturi. Then, the pressure

is

present compensating dia- phragm chamber becomes lower than atmospheric pressure and the diaphragm is pushed up against the strength

of

spring.

When the pressure compensating diaphragm is pushed up, the arm turns against the spring and lowers needle valve, which admits fuel to enter. After this, the same operation 1)

-

6 ) are repeated.

NOTE: OPERATION OF

TICKLER LEVER

When tickler lever is pushed down, the lever connected to needle valve turns against the strength of spring, lower- ing needle valve, which allows fuel to enter.

In a condition

of I ) ,

if primer pump is repeatedly pushed, fuel is pumped up from the tank and air in pressure compensating diaphragm chamber

is exhausted through the overflow valve, so that the pressure compensating

diaphragm chamber is filled with fuel.

Further, when primer pump is operated continuously, fuel is forced to flow into the overflow pipe through the overflow valve and, at the same time, a little amount of fuel is sent to carb venturi through the high

A little amount of fuel sent to carb venturi by the operation of

31,

if recoil starter is pulled, it is taken into the engine, and becomes somewhat

of

the engine.

,-

- a -

I

7.

TROUBLE-SHOOTING

For a gasoline engine to start and run satisfactorily, the following three requirements must be met:

1)

The cylinder filled with a proper fuel-air mixture.

2)

An

appropriate compression in the cylinder.

3)

Good spark at correct time t o ignite the mixture.

If

all the three requirements are not met simultaneously,

an

engine can not be started. There are also other factors such as heavy load at starting

and

too long an exhaust pipe causing

a

most common causes

of

engine troubles are given below.

high

back pressure, which contribute to hard starting. The

7-1 STARTING DIFFICULTIES

Cause

Defects in spark plug

Remedy

1

)' If contaminated, wash in gasoline, remove

, foreign material and dry.

2) If spark plug is broken and lost insulation, replace plug.

3)

Adjust spark gap to

0.6-0.7

mm L024-

0.27").

Defects in contact

:able

If cable is burnt, replace cable along coil.

Defects in magneto

Other defects in electric system

Gas leak from combustion chamber

1)

If wire or insulation is broken, replace magneto.

2) If magnetism is weak, re-magnetize (at the magneto maker) or replace.

1)

If kill switch i s faulty, (short circuiting) replace or repair.

2) If primary wire i s grounded to the engine body, insulate it with insulating adhesive tape.

1) If spark plugs are loose, tighten.

2) If spark plugs are defective, replace.

Defects in piston assembly

Defects in fuel tank svstem

Defects in carburetor

Preventive measure

1 ) Use spark plugs of specified heat range. D o not use poor grade oil. Clean air cleaner and avoid dust entry.

2 )

When spark gap is adjusted, i f center elec- trode is hit or bent, insulator may get dam- aged.

1)

If piston is worn, replace.

2) If piston rings are worn, replace.

3) If piston rings are stuck, clean or replace rings.

1

) Keep air cleaner always clean.

2)

Do n o t use poor grade oil. Change

oil

regularly.

1 ) Clean clogged tank outlet.

2) If incorrect fuel is poured into tank or water i s mixed, drain tank completely and fill it with correct fuel.

3)

When fuel pipe i s locked with air, expel1 air.

4)

If there is any crack or

1 ) Be sure to use a filter when adding fuel.

2) Use m i x t u r e (gasoline 2 0 - 2 5 : o i l 1 ) as fuel. due to their deterioration, replace.

1

)

If clogged with dust, clean.

2)

If defective, replace.

Clean orifices, if they are clogged.

- 9 -

I

Defects in carburetor

Remedy

Preventive measure

1 )

Start engine with fully open choke valve and fully open throttle valve.

2)

Remove spark plug and disconnect fuel pipe, repeat starting operation several times t o evac- uate excess fuel.

1 )

Never close choke valve when engine is warm.

2)

When stopping the engine, r u n it at slow speed f o r a while. This practice not only favourably affects next starting, b u t also improves engine life.

3)

Clogged air-cleaner results in too rich air- fuel mixture.

Clean it thoroughly.

Be careful clogged carburetor. wear. Replace, i f necessary.

1

) I f piston seizes, correct or replace.

2)

If connecting rod large end o r small end seize, replace.

1

I

Do n o t use poor grade oil.

2)

Use fuel of proper mixing ratio.

7-2 OVERHEATING

1 )

If

too much carbon deposits in the combustion chamber, remove it.

2) If the heat range of the spark plug is too cool, replace it with correct one (NGK BM7A).

3) If the air-fuel mixture is too lean, clean the air cleaner.

4)

If the load is in excess, reduce it below the specified continuous load.

7-3 POWER DROP

1 )

If the cylinder, piston or piston rings are worn, replace them.

2) If the carburetor is out of order, re-adjust or clean it.

3) If the spark plugs is faulty (contamination, gas leakage or faulty insulation), clean it or replace it.

4)

If the magneto is faulty, replace it.

5)

If the air cleaner is clogged, clean it.

6 )

If the fuel system is clogged, clean it.

7) If the oil seals at the crankshaft are worn and let the compressed gas through, replace them.

7-4 EXCESSIVE FUEL CONSUMPTION

1)

If fuel leakage, re-tighten screws or replace.

2) If beside these causes, also caused by power drop, perform remedies for power drop, according to

7

- 3 .

POWER DROP.

7-5 ENGINE HUNTING

If the fuel-air mixture is too lean. Clean the carburetor.

7 -6 OTHER COMPLAINTS

1)

Fuel overflow from carburetor

If the fuel flows towards the air cleaner or much fuel flows into the crankcase while the engine is standing still (over- flowing), the needle valve is faulty. Correct or replace it.

2)

If the engine suddenly stops with abnormal noise, the piston or the cranksahft and connecting rod assembly is seized.

Correct them

or

replace them.

3)

If

the engine produces abnormal noise during operation, be sure to stop the engine and do not start it again before the cause’is found.

If the cause for the trouble is not found, contact engineer.

our

distributor and entrust the engine in the hand

of our

service

-

10-

,

8. CHECKS and CORRECTIONS

After disassembling and cleaning the engine parts, check them, and if necessary, correct them according to the correction table. The correction table applies whenever engine are repaired. Its contents should be thoroughlyunderstood by those who

Below, terms employed in the correction table

as

explained.

CORRECTION sisting of repairs, readjustments, and replacements.

STANDARD SIZE

The design dimensions

of

the part without the tolerance.

CORRECTION TOLERANCE

of

improving or recovering the engine performance, con-

CORRECTION LIMIT

The limit on the part and adjustment, beyond which any 'dimensional and functional changes, due to wear, burn, and other causes will adversely affect the normal engine performance.

USE LIMIT

The limit, beyond w h c h the part is no longer usable, due to defects

in

function or strength.

NOTE: All dimensions in the "CORRECTION TABLE"are given in millimeter, except where otherwise specified.

ITEM

5 Ignition coil

Carburetor

81

heat block

0 ) '

.E

c

a

2

m

F

Crankcase

Cylinder

Flywheel

.-

"

.G a

Spark plug a

Muffler

TOOL ft- Ib kg-em

40

40

4 0

4b

-

50

-

50

-

-

-

50

50

140

2.9

8.6

-

3.6

-

3.6

2.9

2.9

-

3.6

2.9

-

3.6

-

10.1 120

150

-

200

10.8

-.

40

-

50

2.9

-

3.6

Torque

Wrench

-

11

-

,

Ring width

9. TABLE OF CORRECTION STANDARDS

ITEM

Clearance between cylinder

& piston

Cylinder bore

Piston

O.D.

Side clearance

of

piston ring

I

STAl,SARD

I

CORRECTION

LIMIT

0.01 5L

-

0.046L 0.08 L

REMARKS

I

28.0 dia

I

28.0 dia +0.02 a t middle portion

I

Cylinder gauge

I

27.99 dia

I

27.99 dia

-0.04

at middle portion

I

Micrometer

0.04L

-

1

L

I

0.15L

I

1.6 +0.08

Max. width or ring

Feeler gauge

Block gauge

SORRECTIOA

METHOD

T

"+

Replace

Replace

Replace

Replace

Replace

Ring gap

Clearance between piston & piston pin

I

1.6

I

1.6 -0.05

I

0.1

-

0.3

I

0.4

0.004T

-

1

L

I

0.03L

Piston pin hole

I

8 dia

I

8 dia

+0.02

I

8 dia

I

8 dia -0.01

Piston pin O.D.

Min. ring width

Max. inner dia

Min. outer dia

Micrometer

Feeler gauge

I

Cylinder gauge

I

Micrometer

Replace

Replace

Replace

Replace

Replace

Side clearance

of

Connecting rod

0.1

L

-

0.5L

Feeler gauge Replace

~~~~

Supporting assembled crankshaft between centers, measure journal where i s 5 mm from crankcase

Axial clearance of crankshaft journal

Tightness

of main bearing outer dia

Bearing O.D.

Housing inner dia

Clearance of main bearing

I.D.

I

0.05

-

0.6

I

0.01 4T

-

0.036T

I

0.8

I

28 dia

I

28 dia

-0.004

I

2 8 d i a

0.002T -0.014L

1

28

dia

-0.01

1

0.02L

I

12 dia

I

12 dia

+0.003

Bearing inner dia

Crankshaft O.D. dia

12 dia 12 dia -0.01

7

Connecting rod small end I.D.

I

8

dia 8 dia +0.018

0.5 * O . l

A i r gap

*O

.l

Spark plug gap

0.6

-

Dial gauge

Dial gauge

Correct

Replace

Replace

Replace

Micrometer Replace

Replace

I

Cylinder gauge

Replace

Dial gauge Replace

I

Feeler gauge

Adjust

Thickness gauge

I

Feeler gauge Adjust

-

12-

I

10. MAINTENANCE and STORING

nance intervals are

by

no means guarantees for maintenance free operations during these is operated in extremely dusty conditions, the air cleaner should be cleaned every day, instead of every

50

hours.

10-1 DAILY CHECKS and MAINTENANCE

1)

Remove dust from whatever which accumulated dust.

2)

Check external fuel leakage. If any, retighten

or

replace.

3)

Check screw tightening. If any loose one is found, retighten.

10-2 EVERY 50

HOURS CHECKS and MAINTENANCE

1) Check spark plug. If contaminated, wash in gasoline or polish with emery paper.

2) Clean air cleaner.

10-3 EVERY 150 HOURS CHECKS and MAINTENANCE

1)

Clean fuel strainer and fuel tank.

2)

Clean contact breaker point.

3)

Clean exhaust port of cylinder and both inlet and outlet of muffler.

10-4 YEARLY CHECK and MAINTENANCE

1) Remove carbon from cylinder head and piston head.

2)

Clean fuel tank inside.

3)

Clean carburetor diaphragm chamber inside.

4)

Replace fuel line once a year.

10-5 PREPARATION for

LONG ABEYANCE

Perform the above 10- 1 and 10-2 maintenance jobs.

Drain fuel from the fuel tank and carburetor float chamber. (In case type

R

with diaphragm carburetor, run the engine until it stops from lack of fuel.)

Remove spark plug, and apply

5

to 10 cc of lubricating

oil

through the spark plug hole. Perform idle operation several times by pulling the recoil starter handle slowly. Reinstall the spark plug.

Clean the engine outside with oiled cloth.

Put a vinyl or other cover over the engine and store the engine in dry place.

-

13-

Industrial

Engines

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