McCulloch MAC 740 Instruction Manual

INSTRUCTION MANUALIMPORT ANT INFORMATION: Plea se read th ese inst ructi o ns carefull yand make sure you understand th em bef o re using th is unit.

10DIFFICULT STARTING (or starting aflooded engine)The engine may be flooded with too muchfuel if it has not started after 10 pulls.Flooded engines can

11Natural conditions that can cause a tree tofall in a particular direction include:S The wind direction and speed.S The lean of the tree. The lean of

12Overcutting beginsonthetopsideofthelogwith the saw against the log. When overcut-ting use light downward pressure.OvercuttingUndercuttingUndercuttin

13S Make your fist cut 1/3 of the way throughthe bottom of the limb.S Next makea 2ndcut all the way throughthe limb. Thencut athird overcut leavinga3

14excess heating orburring ofthe rails occurs.If replacement is necessary,use only theguidebarspecifiedfor your saw in therepairparts listor on the de

15WrongSquared OffCornerToo Much HookAngleWARNING: Maintain the proper hookangle according to the manufacturer’s specifi-cations for the chain you are

16TROUBLE CAUSE REMEDYEngine will notstart or will runonly a fewseconds afterstarting.1. Ignition switch off.2. Engine flooded.3. Fuel tank empty.4. S

17TECHNICAL DATA SHEETEngine Mac 738 740 742Cylinder volume, cm338 40 42Stroke, mm 32 32 32Idle speed, rpm 3000 3000 3000Recommended max.speed, unload

2IDENTIFICATION (WHAT IS WHAT?)ChainAdjustment Tool(Bar Tool)Bar Oil Fill CapChainFront Hand GuardStarter RopeON/STOPSwitchMufflerChoke/Fast IdleLever

3IDENTIFICATION OF SYMBOLSMove ON/STOP switch tothe ON position.Slowly press primer bulb6times.Pull the starter ropesharply 5 times with yourright han

4S Make sure thechain will not make contactwith any object while starting the engine.Never try to start the saw when the guidebar is in a cut.S Do not

5S Mix and pour fuel in an outdoor area on bareground; store fuel in a cool, dry, well venti-lated place; and use an approved, markedcontainer for all

6Thumb on underside ofhandlebarElbow loc kedS Keep a good, firm grip on the saw with bothhands when the engine is running and don’tlet go. A firm grip

7ASSEMBLYProtective gloves (not provided) should beworn during assembly.A TT A CH IN G THE BUMPER SPIKEThe bumper spike may be used as a pivotwhen mak

8ClutchCoverLowerHoleGuide BarAdjusting Pin12. Install bar nuts and finger tighten only.Once the chain is tensioned, you willneed to tighten bar nuts.

9mixed with a good quality 2-cycle air-cooledengine oil designed to be mixed at a ratio of40:1. A 40:1 ratio is obtained by mixing 0,125liter of oil w