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SERVICE MANUAL

McCULLOCHMcCULLO

ModelEager B eaver 2010,Mac 3210Silver Eagle 2012Eager B eaver 2014,Mac 3214,Silver Eagle 2014Eager B eaver 2016,Mac 3216,Silver Eagle 2016

Bore36 mm(1.4 in.)36 mm(1.4 in.)

36 mm(1.4 in.)

36 mm(1.4 in.)

Stroke30 mm(1.2 in.)30 mm(1.2 in.)

30 mm(1.2 in.)

30 mm(1.2 in.)

DispL32 cc(2.1 cu . in.)32 cc(2.1CU. in.)

32 cc(2.1 cu. in.)

32 cc(2.1CU. in.)

DriveTypeDirectDirect

Direct

Direct

MAINTENANCES P A R K P L U G . R e c o m m e n d e dspar k plug is Champion DJ7Y or equiv-alent for all models. Spark plug elec-trode gap is 0.025 in. ( 0.6 mm) for allmodels. Note that spark plug has a ta-pered seat and does not require a gas-ket. Tighten spark plug to 150 in.-lbs.(17 N.m ).CARBURETO R A Z a m a C l Q M 2 7diaphragm type carburetor is used onall models. Refer to CARBURETORSERVICE section for overhaul proce-dures and exploded views of Zama car-buretors.Initial a4justment for both the low-speed and high-speed mixtu re screws isone turn open from a lightly seated po-sition. Make final adjustment with en-gine warm and running. Make certainthat the air cleaner is clean.Adjust idle speed screw so engine

idles jus t below clutch engagem entspeed. Adjust low-speed mix ture screwto obtain high est possible engine speed,then turn screw out (counterclockwise)1/8 to 1/4 turn. Engine should acceler-ate cleanly without hesitation. If en-gine stumbles or seems sluggish whenaccelerating, adjust low-speed mixturescrew until engine accelerates cleanly.Readjust idle speed screw if necessaryto obtain recommended idle speed of2800-3300 rpm. Chain must not movewhen engine is idling.High-speed mixture screw should beadjusted to obtain optimum perform-ance with saw under cutting load. Do

not adjust high-speed mixture screwtoo lean (turned too far clockwise) asmaximum permissible engine speedmay be exceeded and engine may bedamaged from lack of lubrication andoverheating. Maximum no-load speed(with bar and chain installed) must notexceed 11,000 rpm.To r e m o v e c a r b u r e t o r ( 4 F i g .MC130), remove the air filter cover (1)and filter eleme nt. Remove the twoscrews securing the filter base (3) andcarburetor. Remove the filter base andcarburetor, and disconnect fuel line an dt h r o t t l e l i n k . T i g h t e n c a r b u r e t o rmoun t ing sc r ews to 30 -40 in . - lb s .(3.4-4.5 N-m ).

I G N I T I O N . A l l e n g i n e s a r eequipped with an electronic ignitionsystem. The ignition coil and electroniccircuitry are contained in a one-pieceignit ion module (10Fig. MC 130),which is serviced as a un it assembly.Air gap between the fiywheel mag-nets an d the lam inated legs of the mod-ule should be 0.010-0.015 in. (0.25-0.38mm). Loosen ignition module mou ntingscrews and move module to obtain de-sired air gap. If air gap is excessive, en-gine may bie hard to start or may notstar t .LUBRICATION. The engine is lu-bricated by oil mixed with th e gasolinefuel. Recomm ended fiiehoil rat io is 40:1when using McCulloch 2-cycle oil. IfMcCulloch oil is not used, a good grade

oil designed for use in air-cooled,two-stroke engines should be mixed at

a 20:1 ratio. Do not use oil designedautomotive use. Use a separate ctain er to mix the fuel and oil.All models are equipped withautomatic chain oiling system. Recmended oil is McCulloch Chain, and Sprocket oil. Oil designed for amotive use m ay also be used. Selecviscosity according to ambient tperature .

REPAIRSCRANKCASE PRESSURE TESAn improperly sealed crankcase cause the engine to be hard to start , rough, have low power and overhRefer to ENGINE SERVICE sectionthis manu al for crankcase pressure procedure. If crankc ase leak age is icated, pressurize the crankcase and a solution of soap and water to chgasket, seals, pulse line and castifor leaka ge.PISTO N , R IN G S ACYLINDER. To remove the pistonis necessary to remove the powerh(12Fig. MC131) and sep arate the inder from the crankcase as folloUnbolt and remove chain brake hoing (13Fig. MC131), bar and chaRemove the air filter cover (10), housing (24), fiiel tan k (7) and oil ta(20). Remove the ignition module, filter assembly, carburetor and mufflRemove spark plug and install a sable piston stop tool or insert the end

a rope in spark plug hole to prevent cranks haft from rotatin g. Note th at

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CHAIN SAW

Fig. MC130Expioded view of intake and exiiaust components.1. ShieldAir filter elementFilter housing

Carburetor. Gasket6. Insulator7. Seal8. Spacer9. Gasket

10. Ignition module11. Muffler body12. Spacers13. Reinforcing plate

14. Baffle15. Spark arrestor screen16. Baffle17. Muffler cover

hand threa ds (turn clockwise to re-

Remove screws attaching the crank-tak en not to damage th e

bly from the cylinder. Remove re-ng ring s (5) and push piston pin (4)

Cylinder bore is chrome plated andno oversize piston or piston ring isavailable. If chrome plating is wornaway or if cylinder bore is scuffed orscored, cylinder should be renew ed.Apply a thin coat of seala nt to m atingsurface of crankcas e and cylinder whenassembl ing . T igh ten the c r ankcasescrews to 60-70 in.-lbs. (6.8-7.9 N-m).CONNECTING ROD. Refer toPISTON section to remove connectingrod (8Fig. MC132) from engine. Re-move rod cap to separate connectingrod from crankshaft. Rod cap needlebearings will be loose when rod cap isremoved.Inspect connecting rod for worn ordamaged bearing surfaces. Connectingrod should not be bent or twisted. In-spect crankshaft crankpin for wear orscoring.To reassemble, use grease to holdbearing rollers in place in connecting

rod and cap. Install connecting rod oncrankshaf t making sure that matchma rks on rod and cap are aligned. Con-necting rod and cap are fractured andserration must mate correctly. Tightenconnecting rod cap screws to 35-40in.-lbs. (4.0-4.5 N-m ).C R A N K S H A F T A N D C R A N K-

CASE. Crank shaft (7Fig. MC132) issupported in two caged needle rollerbearings (10). Refer to PISTON sectionto remove crankshaft from engine. Re-move the connecting rod cap and sepa-rate the connecting rod and piston fromcrankshaft.Inspect crankshaft and bearings forwear or damage. Note that crankcaseand cylinder have mated surfaces andmu st be renewed as an assembly. Applya thin coat of sealer to mating surfacesof crankcase and cylinder during as-sembly. Tighten crankcase screws to60-70 in.-lbs. (6.8-7.9 N-m). Make cer-tain that the crankshaft rotates freely.If not, disassemble a nd locate problem.Tighten flywheel retaining nut to 180in.-lbs. (20.3 Nm). Do not use impacttools to tighten flywheel nu t and do notover-torque, otherwise flywheel hubcan be cracked and distorted.CLUTCH. To remove the clutch, de-tach chain brake housing (13Fig.MC131), bar and chain. Remove thespark plug and install a suitable pistonstop tool or insert the end of a rope inspark plug hole to prevent the crank-

shaft from rotating. Clutch retainingnut (33Fig. MC132) has left-handthrea ds (turn clockwise to remove). Re-move retaining nut, dust cover (32)clutch assembly (31), clutch drum (30)and needle bearing (29).Inspect all parts for signs of over-heating and excessive wear. If neces-sary to renew clutch shoes, renew ascomplete set. Check sprocket for wornrails and pins. Inspect the sprocket nee-dle bearing for wear.Tighten clutch retaining nut to 180in.-lbs. (20.3 N-m). Nut has left-handthrea ds. The use of an impact w rench toloosen or tighten clutch nut is not rec-ommended.

AUTOMATIC CHAIN OILER. Theautomatic chain oil pump is shown inFig. MC132. Remove the fan housing,fljrwheel and air s hrou d for access tothe oil pum p. A plunger gea r repair kitis available for the pum p. Oil pum p out-put is not adjustable.CHAIN BRAKE. All models areequipped with a chain brake that stopsthe chain motion when the operator's

hand contacts the chain hand guard(1Fig. MC133). TD check for proper

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SERVICE MANUAL McCULLO

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Fig. MC131Exploded view of saw comptypical of alt modeta.1. Starter housing2. Rewind spring3. Rope hand le4. Rope pulley5. Fuel primer bulb6. Front handle7. Fuel tank8. Heat shield9. Fuel hose & screen10. Air filter cover11. Foam filter12. Powerhead

13. Chain brake assy.14. Engine housing15. Throttle latch16. Throttle rod17. Return spring18. Throttle trigger19. Choke rod20 . Oil U nk21 . Oil pickup hose &22. Stop switch contact23 . Stop switch button24. Fan hotising

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chain bra ke operation, place saw on flatsurface and run at wide-open throttle.Activate chain hand guard and chainshould stop moving immediately. Pullhand guard r ea rward to d i sengagebrake. No adjustment of chain brake isrequired. If brake fails to operate prop-erly, disassemble and inspect for prob-lem.

Tb disassemble chain brake, unboltand remove brake housing (8Fig.MC133) from saw. Engage the brake torelieve spring tension. Remove brakeactu ating lever (5) and carefully disen-gage spring (6). Remove brake band (9)from housing.Inspect all components for evidenceof wear or damage and renew as neces-sary. Brake band should be renewed if

any point is worn to a thic knes s of 0.020inch (0.5 mm) or less.

When reassembling, lubricate pivotpoints and latch engaging surface withlight coat of multipu rpose greas e.REWIND STARTER, Tb disassem-b le r ewind s t a r t e r , r emove s t a r t e rhousing (2Fig. MC134) from fan

housing. Remove rope handle (1) andallow rope an d pulley to slowly rew ind.Remove pulley retaining screw (5) andwithdraw rope pulley (4). Care shouldbe taken w hen removing rewind sp ring(3) not to allow spring to unw ind uncon-trolled.I n s p e c t s t a r t e r p a w l s ( 1 6 F i g .MC132) and springs (17) for wear ordamage and renew as necessary.Rewind spring is contained in a case(3Fig. MC134). If spring becomes dis-engaged from the case, it should bewound into the case in a clockwise di-rection from outer end. Starter ropelength is 50 inches (127 cm). Wind rope

on pulley in clockwise direction viewfrom flywheel side.TD pre-tension rewind spring, coplete starter assembly and pass rthrough housing outlet . Install rhandle, then pull a loop of rope b

through the outlet and engage ropenotch of rope pulley. Rotate pulley tum clockwise with rope in notch. Rlease rope from notch in pulley. Roshould be held snugly against starter housing.Pull rope handle and check rewoperation. With starter rope fully tended, it should be possible to tupulley at least an additional 1/2 tclockwise. Be su re excessive tensionnot placed on rewind spring, otherwspring may break when rope is pullto its fiill length. Repeat spring p

tension procedure until desired rewiaction is obtained.

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cCULLOCH CHAIN SAW

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Fig. MC132'-Expioded view ofpowerhead typicaiof ai l models.

1. Cylinder2. Piston ring3. Piston4. Piston pin5. Snap ring6. Needle bearing^ 7. Crankshaft^- 8. Connecting rod^.-f 9- Seal^ ^tf'^Tjn 1^- Main bearing^ ^ ' ' ^ 11. Needle rollers12. Worm gear13. Spring14, Seal15. Oil pump housing16. Starter pawl17. Spring

18. Flywheel19. Air shroud20. "0" ring21 . Washer22. Spring23 . Oil pump plunger24 . Plug26 . Oil hose26 . Adjusting screw27. Crankcase28. Washer29. Needle bearing30 . Clutch drum31 . Clutch hub & shoes32 . Dust cover33 . Nu t

Fig. fACi33Expioded view of chain braife assembly.1.2.3.

Hand guardBrake stopBrake latch

4.5.6.

RollerActuating leverBrake spring

7.8.9.Bar pad spacerBrake housingBrake hand

10 .1112 .Foam sealShieldShoulder bolt

Fig. fiAC134^Expioded view of rewind starter.1. Rope handle 4.Rope pulley2. Starter housing 5.Screw3. Rewind spring & case 6. Fan housing

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