CHECK GUIDE BAR
Conditions which require guide bar mainte- nance:
SSaw cuts to one side or at an angle. S Saw has to be forced through the cut. S Inadequate supply of oil to bar/chain.
Check the condition of guide bar each time chain is sharpened. A worn guide bar will damage the chain and make cutting difficult. After each use, ensure ON/STOP switch is in the STOP position, then clean all sawdust from the guide bar and sprocket hole.
To maintain guide bar:
S Move ON/STOP switch to STOP.
S Loosen and remove bar nuts and clutch cover. Remove bar and chain from saw.
S Clean the oil holes and bar groove after each 5 hours of operation.
Remove Sawdust From
Guide Bar Groove
Oil Holes
S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file.
SWhen rail top is uneven, use a flat file to re- store square edges and sides.
File Rail Edges 
and Sides
Square
Worn Groove | Correct Groove |
Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when ex- cess heating or burring of the rails occurs. If re- placement is necessary, use only the guide bar specified for your saw in the repair parts list or on the decal located on the chain saw.
CHECK FUEL MIXTURE LEVEL
S See FUELING ENGINE under the OP- ERATION section.
LUBRICATION
Bar Oil
Fill Cap
SSee GUIDE BAR AND CHAIN OIL under the OPERATION section.
INSPECT AND CLEAN UNIT AND DECALS
S After each use, inspect complete unit for loose or damaged parts. Clean the unit and decals using a damp cloth with a mild deter- gent.
SWipe off unit with a clean dry cloth.
CHECK CHAIN BRAKE
See CHAIN BRAKE in the OPERATION section.
CLEAN AIR FILTER
CAUTION: Do not clean filter in gasoline or other flammable solvent to avoid creating a fire hazard or producing harmful evaporative emissions.
Cleaning the air filter:
A dirty air filter decreases the life and perfor- mance of the engine and increases fuel con- sumption and harmful emissions. Always clean your air filter after 10 tanks of fuel or 5 hours of operation, whichever comes first. Clean more frequently in dusty conditions. A used air filter can never be completely cleaned. It is advisable to replace your air fil- ter with a new one after every 50 hours of op- eration, or annually, whichever comes first.
1.Loosen 3 screws on cylinder cover.
2.Remove cylinder cover.
3.Remove air filter cover and air filter.
4.Clean the air filter using hot soapy water. Rinse with clean cool water. Air dry com- pletely before reinstalling.
5.Reinstall air filter and air filter cover.
6.Reinstall cylinder cover and 3 screws. Tighten securely.
Cylinder
Air FilterCover
Cover
Air Filter
INSPECT MUFFLER AND SPARK ARRESTING SCREEN
As the unit is used, carbon deposits build up on the muffler and spark arresting screen, and must be removed to avoid creating a fire hazard or affecting engine performance.
Replace the spark arresting screen if breaks occur.
Spark Exhaust
Arresting Outlet
Screen Cover
Nut
Muffler
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