McCulloch Mini-Mac 6 Owner's Manual

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SAWS

O""NERS'MANUAI:

• N l C C U L L O C H ! I m I l C O R P O R A T I O N

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83924

01910 U.S.A. McCULLOC H CORPORATION

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Fuel & Engine Lubrication 5 Dirt & Sawdust

Sprocket . . . .

Chain Lubrication . . . . 6

Operating Instructions .

Starting & Stopping

If En gine Floods . .

Breaking-in A New Engine

Cutting With Your Saw

S::IW

Maintenance

Air Filter .

Spark Plug.

Exhaust Stack

Carbur etor Adjustment

8

10

11

12

13

17

17

20

21

22

Chain Maintenance

Installin g The Chain

Chain T ension

New Chain Break-in

Chain Lubrication

Chain Sharpening

Keep Chain Clean

If Chain Breaks

Bar Maintenance

Cleaning .. rUll a cham saw (and even if you have) reading this manual will make your new

~Iini-Mac

6 a 101 easier to use.

"_'_'_' __

The serial numb e r of Ihe saw is scamped on a metal tab, attached tOlhe rear handle

2

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'~"~"~.m~~~'~"~"~"_"~'~"~"~"~Y~"~"~'~'~"~W~b='~f"~'~'~Y~"~'~ '~"~"~d ~"~'i~,~m~"~"~ "~O[~'~b~"~'~'~f in case the s aw is lost or stolen; and keep {he record in a safe place.

~Y_"_'_"_"

__ adjacent 10 the spark plug. Make a record of the serial number for identification

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24

24

27

27

28

29

29

30

35

35

36

36

A power chain saw is a most useful and efficient woodcutting tool. As in the operation of other mechanical equipment, however,

i

t requires common sense handling to provide safety as well as labor saving performance. A few simple Do's and Don'ts can make all the difference.

Be safe!

Start your saw without help.

Start the saw on a firm surface.

Turn off your saw when moving between cuts.

Be su re of your footing and pre·plan a safe exit from a fallin g treo.

Watch out for falling limbs.

Refuel in a safe place. Guard against fire hazards.

Keep a firm grip on a running saw with both hands.

Beware of "kickback".

Wear close fitting and protective clothing including safety hat s, goggles, shoes and gloves.

Obey all laws, ru l es and regulations of the cutting area.

Keep the chain snug on the guide bar.

Keep all screws and fasteners tight.

Be sorry!

Fail to follow the instructions for operat ion o f the saw i n this owner's manual.

Start a saw on your leg or knee.

Let a moving cha in touch your clothing.

Touch or try to stop a moving chain w ith your hand.

Allow any other person or animal close to a running saw or where a tree i s being cut down.

Cut with a dull o r loose chain.

Smoke while operating the saw.

Spill fuel or sta rt a saw whero you fuel it.

Refuel a hot saw.

, (Allow it to cool a few minutes.'

Use any other fuel than that recommended in your owner's manual.

Run the saw without an exhaust stack, muffler or spark arrester.

Allow dirt, fuel or sawdust to build up on the engine or outside of the saw.

Forget the rule s for fir e prevention and forest protection.

3

4

FIGURE 1

OILER BUTTOt-l

.1... .. _ _ _ _ _ _ _ _

1etdad&~L~

Two-cycle

engines are lubricated

by

oil

mixed into

the gasoline. The correct

ratio

of oil

to

gasoline

is

very

important.

Follow the ratio specified

in the

FUel Mixture Table. Use only

regular

grade gaSOline. McCulloch 40:1

Oil is

the best

two-cycle

motor oil to

use.

If it isn't available, use any well

-known

brand of SAE 40

two-cycle, non-additive,

motor oil. Never

use

dirty or

reclaimed

motor

oils.

Thoroughly

mix

the

gaSOline and

oil in a

container equipped with

a flexible

spout

before filling

the fuel tank of your saw. Wipe the

fuel

cap and

the

area

around

it

clean before filling

the

fuel tame. Do

not

let

dirt get

into the fuel tank. Dirt

can seriously damage the engine.

FUEL MIXTURE TABLE

WITH McCULLOCH 4Ch! OIL

(40 TO 1 RAT 10)

,

Gasoline

U.S. GALLONS

Oil

1(60Z.)CAN

1.1/2 IMPERIAL GALLONS

1(60Z.)CAN

1 LITERS 1{60Z.)CAN

5 U.S. GALLONS

~

IMPERIAL GALLOHS

19 LITERS

1 (16 02.) CAN

1 (16 OZ.) CAH

1 (16 OZ.) CAN

GASOLINE TO OIL RATIO

WITH SAE ~o TWO-CYCLE MOTOR OIL

( J 6 TO

1 RAT 10)

Gasoline

Oil

1 U.S. GALLON llMPERIAL GALLON

4LITERS

1/2U.S.P

I NT

1/21MPERIAL PIN T

1/4 LITER

2 U.S. GALLONS 1 U.S. PINT

2 IMP ERIAL GALLOHS llMPERIAL P 11'1 T

8 LITERS

1/2

LITER

5

Your chain is

lubri cate d

with oil from the chain oil tanle Fill the oil tank each time

you

fill the fuel tan1e

We

r ecommend

using McCulloch

Chain ,

Bar and Sprocket Oil which

co ntains

additives to reduce friction and wear and to assist in the prevention

of

pitch

for mation on

the bar and chain . If McCulloch Chain , Bar

and

Sprocket Oil is not available, use SAE 30 non-additive motor oil at temperatures

above

40 and

SAE 10 non-additive motor oil at

lower

temperatures.

Keep the

oil

supply container clean. Wipe

the oil tank cap and

the

o il

tank surrounding the fill area clean before filling the

oil tank.

Do not use dirty or reclaimed motor

oils

under any circumstances. Dirt can plug the chain oiling system. Never operate your saw if the oiler

system

does not work.

AUTOMATIC OILER ADJUSTMENT

Some Mini Mac 6 saws are equipped with an automatic

cha in oiler.

adjusted at the factory for

average

cutting conditions. Oil now may be adjusted however,

6

to suit individual desires by an adjustment screw at the front of the saw. Turn the screw clockwise to decrease oil fl ow and counterclockwise t o in c reas e it.

The automatic oiler adjust m ent screw s h ou l d never be t urn ed more t h a n a qu arter turn at a ti m e without checking the oil flow after the adjustment. Maximum o il flo w can em pt y the c h ain o il tan k in ap proximately ten minutes of cutti n g . Where increased oil flow is desired for short periods, it is better to suppl ement the o il flow by m o r e frequent use of the manual oiler button. The automatic oiler supplies o il whenever the engine is running. Long periods at idle speed can result in oil puddl es beneath the saw and wasted oi l. It is advisable to turn th e saw off between c u ts unless it is in almost co ntin uous us e.

7

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CHAIN TENSION IS IMPORTANT:

A

too

loos e c h ain can be danger ou s a too tight chain can be expe nsive because it will

wear rut fast.

Even th ough yo u r c h ain is installed , check chain t e nsion before yo u start your saw. Chain t e nsion is correct w h en the chain has a snug fit on the bar rut ca n sti ll be p u ll ed easily aroun d t h e bar by hand. C h ain i s sharp protec t your hand w h e n touc h ing it.

MOUNTING NUT

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8

Follow these steps to adjust chain tension:

1.

Loosen the bar mounting nut.

See Figure 3.

2. With the bar nose or rounded end of the bar held up! turn the tension adjusting screw clockwise to tighten the chain. Turn the screw counterclockwise to loosen the chain. See Figure 4.

3. When tension is correct! tighten the bar mounting nut while still holding the nose of the bar up and then recheck chain tension by pulling it around the bar. Protect your hand from the sharp cutting teeth of the chain.

See Figure 5 .

A chain will lengthen during the first few hours of use. If the chain is hot to the touch, allow it to cool before checking tension. Keep chain and bar groove oiled. For more information on chain maintenance, tUrn to page 27.

9

STARTING

&

STOPPING

1. Fill the fue l tank with the correct fuel mixture . Fill the chain oil tank with McCulloch Chain, Bar and

Sprocket Oil. Pump the manual oiler lxIt t on until oil shows between the chain and th e bar at the top of the bar where the chai n comes Qut from b ehi n d the clu teh guard.

Figure 6.

2. Make sure the chain has the correct tension and that the bar is tight on the saw.

3. Slide the ignition switch to th e ON position.

4 .

Turn the choke l ever to the fully closed pOSition . A warm engine usually does not r e quir e the us e of the choke. However, when restarting an ex-

10

tremely hot engine or one w hi ch has just been r e fueled, it may be nec ess ary to use the chok e to clean out the vapors in th e carburetor.

5. Hold the throttl e trigger back and pull th e starter handle with a smooth, rapid stroke. Guid e t h e rope back into th e s tart e r. Th e eng in e shou ld start with two or three pulls. Additional pull s may be r e quired if th e e ngin e h as n ' t b ee n started r ecen tly or if the fu e l tank was empty prior to bein g filled .

6 . As soon as the eng ine starts, turn the c h o k e l ever to the open positi o n . U se choke and thr ott l e as n ecessary to k ee p the eng in e running until warmed up.

Nev er run the eng ine at full s peed unl ess cuttin g wood.

7. Pu m p the chain o il button e v e ry ten to fifteen seconds or as need e d to keep th e chain and bar g roo ve lubricat e d.

8. To sto p the engine, release the throttl e trig ge r and slide the i g nition switch to th e OFF position.

IF ENGINE FLOODS

1.

Turn c hoke l ever to op en position. Move igniti o n switch t o ON.

11

2. Hold saw with muffler side down.

3. Hold throttle trigger full back and pull starter handle until eng ine starts.

BREAKING

IN

A

NEW

ENGINE

Run your saw engine at one-third throttle for three minutes and then at onehalf thr ottle for three minutes prior to making your first cut. By operating the engine at part throttl e for th e first few minutes with the correct fuel mixture, all bearin g surfaces will be properly lubricated for lon ger life and better performance.

The saw shruld always be operated at full throttl e when it is under load and in the cut, but only when cutting under load conditions.

Make several preliminary cuLs to get the feel of your saw. Stop the eng ine after each preliminary cut and check the cha in to make SUre it is lubricated prop er ly and to adjust chain tension.

12

CUTTING WITH YOUR SAW

The most common types of cutting are felling , limbin g, pruning and bucking.

Advice on how to make these cuts is given in the paragraphs which follow,

It is helpful to use a spike which is an accessory available from your McCulloch dealer .

FELLING

Felling i s the t erm for cutting down a tr ee. Small trees of up to six and a half or seven inches in diameter are usually cut through in one c ut. Larger trees require undercuts. Undercuts determine the direction the tree will fa ll . The tree, unless it is l eaning too far in the wrong direction, will usually fall toward the side of the undercut. Types of undercuts are shown in the illustration . Type

A is easy to make and commonly used for small trees. Type B leaves the butt end of the log cut square . Type C is a variation of Type A. The unde rcut shou ld be about one-third of the diameter of the tree. Do not cut comp l ete l y through to th e undercut on the felling cut. Th e uncut band of wood between th e undercut and the felling cut acts as a hinge. Figures 7 and 8.

13

Felling Cut

FIGURE

7 A

If th(;:re is bru sh around the tree you are felling, clear a working space so that yoo do not trip or stumble when working , Have a clear path of retreat before making the felling cut. Watch out for dead limbs and bark which might fall while you are cutting.

D;,ect;on~

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1 '1 ,

' [ ' 1

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, _

B

FIGURE

8

~

Be sure to clean the cut wood out of the undercut so the tree will fall true.

Make the felling cut horizontal, moving the bar in an arc.

If you are using a

14

(

spike, let the moving saw chain draw the spike tight against the tree. The spike will act as a fulcrum. On a small tree, the felling cut can be made from one side. On a larger tree, make the felling cut from both sides. You cha then see what you are doing and will be able to leave an equal amount of wood as a hinge.

LIM BING

Limbing is the process of removing limbs from either standing or fallen trees.

Make sure you are out of the way of any falling limbs. If the tree lies on sloping ground, cut off the limbs which are off the ground first. Be sure to stand on the uphill side of the tree when cutting on sloping ground.

" " - - - - - ,

PRUNING

Pruning is removing unwanted limbs from a standing tree to improve the tree ' s appearance .

It is advisab l e to attach the saw to a rope so you can pull it up into the tree after you. Keep the rope tied to the saw while cu tt ing and tie the other end to the tree so the

15

saw can fall only a short distance if you drop it. Make sure yoo are secured to the tree. A safety r cpe or belt aroond the tree trunk will allow yru to us e both h a nd s On t h e saw.

When pruning make an undercut a f ew inch es from t he trunk first. This w ill prevent the falling limb fr om tearing away bark from the trunk. Then mak e a do w n ward cut to mee t the upward cut.

Finally, after th e limb has fall e n , make a second downward cu t next to the trunk to remove t h e st ub. Figure 9.

BUCKING

Bucking is cutting a fallen lo g into l e n gt h s. Make su r e you have good footing am stan d uphill of the log wh e n cutting o n s l op in g grrund. If poss i bl e,

16

FIGURE 10

the log should be supported so that the end to be cut off is off the ground in the air.

Ii

the log is supported at both ends and you must cut in the middle, make an undercut halfway through the log and then make your dow n ward cut. This will prevent the log from pinching your bar and chain. Be careful that the chain does not cut into the ground when bucking as this causes rapid dulling of the chain. Figure 10.

While most of the maintenance of the Mini Mac 6 can be done by anyone handy with tools, specialized adjustments and repair work should be done by a

McCulloch chain saw serviceman.

AIR FILTER

The air filter acts like the a i r filter on a car.

It keeps d i rt out of the eng ine.

The air filter must be kept clean . If the filter gets dirty, the engine won't run properly because the dirt will block the flow of air .

17

To clean th e air filt er -

1. Lift the spring latch of the a ir cleaner cover and remove the cover.

Figure 11.

2. Lilt off the air Hlter screen, Figu res 12 and 13. B l ow the filter clean w i t h li ght a ir p ressure or wash it in fuel mix. Dry in open air and keep away from openflame.

3. Retnstall th e screen in it s or i gin al position centered wit hin the ring of sma ll l ocating stu d s on th e fan hou s in g .

4. R einsta ll cover . Slide the lips on forward e nd of cover under mating flanges on ian housing, then press rear e nd of th e cover down until it snaps into position, smooth and even all around at t h e edges. Push the spring la tch down until it engages th e r e tainin g notch at t h e back of the fan h ous in g .

18

FIGURE 12

FIGURE 13

19 j

,

SPARK PLUG

A clean, properly gapped spark plug " is a major factor in easy starting and best performance. When starting or performance is not satisfactory, the plug should be cleaned and gapped.

To clean and gap the sparl{ plug --

1. Remove the rubber connector from the spark plug. Figure 14.

2.

Remove the spark plug with a spark plug wrench.

3. Clean the electrodes with emery clQth or very fine sandpaper. not use a spark plug cleaning machine. It is almost impossible to clean the grit from the spark plug.) Blow all dust away.

4. Adjust the side electrode to a gap of 0.025 inch (0.635 mm).

5. Wipe all dirt off the white porcelain insulator and reinstall the spark plug and connector. .

20

.'f

If the spark plug is damaged it will not function properly. Install only the new spark plug recommended by your McCulloch chain saw serviceman.

EXHAUST STACK

The exhaust stack is attached to the saw with two screw s. The stack should be removed occasionally and cleaned of carbon deposits that may

, build up until engine exhaust is restricted. Clean the stack by scraping away aU of the heavier deposits, then wash it with a solvent. Avoid any ~craping while the stack is on the engine because of the danger of particles falling into the combustion chamber. An accessory spark arrester (screen) is available from your McCulloch dealer, for use in fire hazardous areas.

21

CARBURETOR ADJUSTMENT

While the carburetor was set at the factory, it may be necessary due to local conditions to readjust it. As carburetor adjustment is critical and if done carelessly can damage the carbure tor and engine, it should be done by a Mc-

Culloch chain saw service technician. In an emergency or to satisfy an im mediate need until your serviceman can do it properly, you can by carefu lly following the steps indicated, temporarily adjust the carburetor. NOTE: Before making any carburetor adjustments make Sure the air filter is clean . Very often a dirty air filter will make the engine operate as though the carburetor needed adjustment. Cleaning the air .

1. Carefully tUrn the idle and high speed adjustment needles clockwise until resistance is felt. Do not turn the needles in too tight or you can dama ge the tips of the needles and their seats. Then open

(turn coonterclockwise) each needle

1 turn.

22

,.

2. start the engine and let it warm up for at l east three minutes. Do not race the engine. If the engine will not idle and keeps stopping, turn the idl e speed screw clockwise until the engine idles. The chain may move slow l y when the engine is cold. If it still moves after the engine is warmed up

I turn the screw counterclockwise until the chain stops.

3. Hold the eng in e bar nose down and turn the idle adjustment ne edle until the engine idles smooth l y and accelerates without hesitation or stumbling . Final position of the idle adjustment needl e will usually be between 1 / 2 and 3 / 4 of a turn open. Turn the engine to see that it idl es smoothly in all positions.

If necessary , readjust th e idle speed screw to a point just below where the chain starts to move.

4 . While cutting wood with the saw, adjust the high speed adjustment needle for best power. Do n ot judge by the sound; judge by the way the saw cuts. Final position of the high speed adjustment needle should be 1 / 2 to 3 / 4 of a turn open.

5. Check idle operation again. It may be necessary to adjust the idle adjustment needle slightly to obtain best idle operation after the high speed adjustment ne edle has been set.

23

DIRT

&

SAWDUST

U's natural for any saw to acquire dirt and sawdust when it's used. But the saw must be kept clean for proper operation. In addition to the air filter, the

openings in the fan housing, the cooling fins and the area around the sprocket

must be kept clean. The fins and sprocket area are accessible after removing the clutch guard. Scrape the dirt away with a blunt wooden scraper or wash it

.... with solvent. A bottle brush or o ld tooth brush will he lp. When the saw is clean, reinstall the clutch guard. Tighten all attaching screws and nuts securely.

SPROCKET

The sprocket is part of the clutch drum which is held on the crankshaft by the clutch rotor. The drum bushing should be lubricated frequently with a good

grade of non-fibrous chassis grease

.

To remove the sprocket and drum for lubrication or replacement, proceed as follows:

24

1. Remove the clutch guard, bar and chain, and the front cover and fuel tank.

2. Lock the flywheel with a screwdriver braced against one of the heavy flywheel bosses (not a hnL and the flywheel nut. Figure 17. Turn the clutch rotor nut clockWISe to remove it and the clutch assembly.

3. Remove the sprocket and drum and lubricate the cranks haft and drum bushing.

After lubri cation and / or replacement, and reinstallation, l ock the flywhee l with oppos it e leverage on the ticrewdriver and remember to tUrn the clutch rotor counterclockwise to i n titall it. The clutch must be secure l y tight on the cra nkshaf t.

When replacing the fuel tank and front cover, be sure to line up the fuel hose and the oil connector with the corresponding tank receptacles as shown in

Figure 18. Guide the tank and cover carefully as they are installed on the saw t o insure both connections. After installation of tani" and cover, check both connections by inspection.

The fuel hose connection can be inspected through an inspection hole i n the fan hOU Sing on the underside of the saw. To inspect the oil connection, look under the bar pad past the edge of the clutch drum.

25

26

Your Mini Mac 6 is equipped with a McCulloch S25 saw chain. The chain is designed for maximum performance with your saw and no other chain should be used. The chain requires care if it is to continue to cut easily, to last a long time and provide the proper kind of service. This .

is how to look after it.

INSTALLING THE CHAIN

1. Remove the bar mounting nut and remove the clutch guard.

2. Turn the chain tension screw counterclockwise as far as it will go. Push the bar toward the sprocket and remove the old chain. Do not remove the bar.

CAUTION! McCulloch saw chain is sharp! Handle it carefully for it can cut if handled carelessly.

27

3. Place the new chain around th e sprocket and bar. The cutting edges of the chain along the top of the bar face toward the nose.

4. Fit the adjustment nut tang into the bar and install the c lut ch guard. Tighte n the bar mrunting nut finger tight.

5. Adjust chain tension.

CHAIN TENSION

Chain tension is correct when, with the bar nose held up and the chain snug on the bar , the chain can still be easily pulled around the bar.

1.

Loosen the bar mounting nut .

2. Turn the chain tension screw clockwise until cha in is snug with the bar nose held up.

3. While still holding bar nose up, tighten the bar mounting nut secure ly.

28

Check chain tension frequently on a new chain. Check chain tension at least every hour on an older chain. If the chain is hot, allow it to cool before adjusting it.

Correct chain tension results in easier cutting and operation.

Maintain it at all times.

NEW CHAIN BREAK-IN

1. Run the chain at slow speeds for at least three minutes. Make sure enough oil is pumped onto the chain to flood the bar groove. Increase speed to half throttle and run chain for another three minutes. Stop the engine and check and adjust chain tension.

2. After using the saw for the first ten minutes, shut off the engine and again check chain tension. Repeat tension check several times during the first few hours of operation.

CHAIN LUBRICATION

Make sure the manual oiler works before starting your saw. Pump the oiler button. Oil should appear between the chain and bar at the top of the bar just forward of the sprocket guard. Keep the oil tank filled with clean oil.

29

Use plenty of oil on the bar and chain when cutting. Never let the chain run dry on the bar. In abrasive wood, pump the oiler button more frequently.

CHAIN SHARPENING

Chain sharpening is divided into two main steps sharpening cutter teeth and l owering depth gauges. T h e names of the parts of the cutters are shown in

Figure 19.

Tooth Top P l ate Edge

The use of a McCulloch Depth Gauge too l and a McCulloch File Guide is recommended to make chain sharpening a relatively easy task. Your McCulloch chai n saw serviceman will advise wha t clearance to set your depth gauges. If you require any advice or help, always feel free to callan him.

30

FI

G

U

RE

1

9

SHARPENING CUTTER TEETH

When sharpening cutter teeth, use a l iB -inch diameter round file. \Vhen mounted in t h e McCu ll och Fi l e Guide and he l d proper l y

J this size file will give the proper shape to the top and side plate edges.

1. Adjust chain tension snug on the bar to keep the chain from leanin g over under filing pressure. Or place the chain in a chain filing vise.

2. Mount the l iS -inch diameter rile in the McCulloch File Guide.

3. Place file and guide on the tooth to be sharpened as shown. The guide rides On the top plate of the tooth the flat of the guide against the flat of the tooth to provide proper placement of the file against the top plate edge.

Avoid letting the front of the guide drop or rise up as this will cause a hook or backslope. Figure 20.

31

4. Turn the guide so the guide lines are parallel to the chain as shown in the illustration. Hold the guide level and push the file from the inside of the cutter being sharpened toward the outside. Extend the first finger to assist in applying pressure during filing. See

Figure 21.

F IG U RE 21

5. Push the file toward the outside of the cutter with pressure against the side plate edge. Maintain the same relationship between the guide lines and the side of the chain and hold the guide level.

6. Release pressure against the cutting edge on the return stroke.

7. Continue to file the tooth until it's sharp. Do all the teeth on one side of t h e chain first. Sharpen the teeth at the same point on t he bar. Then move to the other side of the chain and sharpen the remaining teet h . Try to use the same number of strokes on all teeth as this will help to keep them all the same length. You can check the length of the teeth with the scale on the depth gauge too l. Each mark on the scale equals 1 / 16 inch.

32

8. Rem o v e th e fil e (rom the file guide. With the handl e held high, file down and toward th e outside of each cutter to clean out th e gullet. Do not touch the cutting edges during this operation.

LOWERING DEPTH GAUGES

D e pth gauges were set at the factory for average cutting. Wh e n cutting soft woods , d e pth ga u ges should be lowered for g reat e r clearance. Try cutting with

ta d,

l e efo ave th r e e lowerin g the depth depth gauges gauges as they are.

. If the chain feeds easily into the

Use a McCulloch Depth Gauge tool and a flat file to lower the depth gauges.

For most types of cutting, whether soft or hard wood, a clearance of 0.025 inch is best. Use th e McCulloch Depth Gauge tool with the 0.025 and 0.030 inch

clearances.

Both

the McCulloch Depth Gauge tool

and

the McCulloch

File

Guide

are li g ht and convenient enough so they can be carried in your hip pocket when you are usin g th e saw.

33

FIGURE 22

1. Place the d ep th gauge too l ove r two cutter teeth with the depth gauge on the first cutter project i ng thrrugh the 0 .025 inch clearance s l ot of the tool. Figure 22.

2. Remove the projecting par t of th e depth ga uge with the flat file. Fi l e ac ross the depth gauge tool toward the outside o f the c h a in.

3. After l owe ri ng all the depth gauges, rrund off th e ir l eading edges with a strcke o r tw o of th e fiat file. Maintain the same profile as on origi nal depth gauges and as s h own in Fi g ure 23.

4 . Always file d epth gauges a t th e same p l ace on th e bar in order to assu re uniformity.

34

/

\

-

~

FIGURE

23

Cl ~?r?

\

,

'\ l \

~.

0

OJ

4. Always file depth gauges at the same place on the bar in o r der to assu r e uniformity.

KEEP CHAIN CLEAN

After s harpening chain , pull it s low l y around th e bar while pumpin g th e manual oil button frequ e ntly. This will he l p flush filin gs and dirt off th e cha in. If the chain i s very dirty, remove it from th e saw and wash it in kerosene or so lv ent to remove dirt and filings . Soak the chain in SAE 30 motor oil to lubricate it and prevent rust before putting it ba ck on the saw .

IF CHAIN BREAKS

If th e chain breaks, take it to your McCulloch chain saw deal e r or serviceman.

H e can repair it. H e will also check th e conditio n of the bar and sprocket and h e l p to keep y our chain saw in operating condition.

35

Do not use the bar to pry objects. If the bar is pinched in wood and cannot be freed, use wedges or an axe to force the wood apart and free the bar. Never try to force wood apart with the bar.

CLEANING

After foor or five hours of operation, remove the bar from the saw. Clean the sawdust and grime from the oil holes in the side of the bar and from the passage between the oil holes and bar groove. Use wire or pipe cleaner.

Clean all sawdust and grime from sides of bar and bar mounting pad.

Reinstall bar with opposite edge down to equalize wear.

36

I

-

:'~O:'~;'~~·

--

~-

FIGURE 24

Bac Gmaves

For shipping purposes, fuel is removed from the engine after the engine is tested. Lack of use or a period of storage can also result in removing or evaporating all fuel from the engine.

Under these circumstances, it can be easier to start the engine in the following manner: Remove the air filter cover and air filter. Hold the saw bar nose down and inject about 1/2 teaspoon of fue l mixture through the carburetor air intake.

(An oil can with the proper fuel mixture is ideal (or this purpose.) Do not flood the engine. Turn the saw so as to move the fuel mixture through the duct and carburetor into the crankcase. Usually two or three pulls of the starter rope will draw fuel into the combustion chamber and start the engine.

It may be necessary to repeat the injection two or three times before the engine wi ll run by itself. Replace the a i r filter and air filter cover. Never cut with the air filter and air filter cover removed from the engine.

DO NOT USE THIS METHOD FOR REGULAR STARTING.

37

38

·NOTES·

·NOTES·

39

ImMcCULLDCH

•

MANUFACTURING

•

McCULLOCH CORPORAT\ON

6101 WEST CENTURY BLVD., lOS ANGELES, CALIFORNIA 90045

INTERNATIONAL DIVISIONS:

LOS ANGelES, CALIF.,

HONG KONG , B. C.

P. O. BOX 45466 c.:

G. P. O. BOX 879

McCULLOCH OF CANADA LTD.

77 BELFielD ROAD , REXDAlE ,.

ONTARIO , CANADA

McCULLOCH OF EUROPE, N. V.

ANTOON SPINOYSTRAAT 5 , MECHElEN , BELGIUM

McCULLOCH OF AUSTRALIA PTY., LTD.

P.o. BOX 165, SOUTH GRANVillE , N. S. W ., AUSTRALIA

McCulloch C o rporation reserves the ri g ht to modify or chang e specifications without (1) prior nqtification or (2) obli g ati o n includin g the obligati o n t o ba c k-fit or supply back fit c omp o n e nts for units previously shipped from the fa c tory.