Replace guide bar when the groove is worn,
the guide bar is bent or cracked, or when
excess heating or burring ofthe rails occurs.
Ifreplacementis necessary,useonly theguide
bar specifiedfor your saw intherepair parts list
or on the decal located on the chain saw.
TO SHARPEN CHAIN:
1.
2.
3.
Move ON/STOP switch to the STOP
position.
Check chain for proper tension. Adjust
chain tension if necessary.
Sharpen cutters.
S To sharpen the cutters, position the
file holder level (90˚) so that it rests
on the top edges of the cutter and
depth gauge.
SPARK PLUG
The spark plug should be replaced each
year to ensure the engine starts easier and
runs better. Ignition timing is fixed and non-
adjustable.
NOTE: The chain has both left and
right hand cutters.
1.
2.
3.
4.
Loosen 3 screws on cylinder cover.
Remove the cylinder cover.
Pull off the spark plug boot.
Remove spark plug from cylinder and
discard.
File Holder
Cutter
File
5.
Replace with Champion RCJ--7Y spark
plug and tighten securely with a 19 mm
socket wrench. Spark plug gap should
be 0,5 mm.
90˚
Depth Gauge
6.
7.
Reinstall the spark plug boot.
S
Align the 30˚ file holder marks paral-
lelwiththebar andtothecenter ofthe
chain.
Reinstall
the
cylinder
cover
and 3
screws. Tighten securely.
Cutter
Cylinder
Cover
3
0˚
Cutter
File Holder Line
Spark
Plug Boot
S
Sharpen cutters on one side of the
chain first. File from the inside of each
cutter to the outside. Then, turn the
chain saw around and repeat the pro-
cess for the other side of the chain.
Fileontheforward strokeonly. Use2
or 3 strokes per cutting edge.
Keep all cutters the same length
when filing.
S
S
S
Spark
Plug
File enough to remove any damage
to cutting edges (side plate and top
plate of cutter).
All Cutters
Same Length
Remove Damage
CHAIN SHARPENING
WARNING: Improper chain sharpen-
ing techniques and/or depth gauge mainte-
nance will increase the chance of kickback
which can result in serious injury.
Top Plate
Side Plate
WARNING: Wear protective gloves
when handling chain. The chain is sharp and
can cut you even when it is not moving.
Conditions which indicate the need for chain
sharpening:
S
File chain to meet the specifications
as shown.
80
˚
60˚
S Reduction in size of wood chips. The size
ofthewoodchipwilldecreaseas thechain
gets duller until it becomes more like a
powder than a chip. Note that dead or
rotted wood will not produce a good chip.
S Saw cuts to one side or at an angle.
S Saw has to be forced through the cut.
30˚
Hook Angle
0,65 mm
Tools required:
S 5/32 inch (4 mm) diameter round file and
file holder
Rounded
Corner
S Flat file
S Depth gauge tool
Right
14
| Categories | Chainsaw Manuals, McCulloch Chainsaw Manuals |
|---|---|
| Tags | McCulloch M838 |
| Model Year | 2009, 2010 |
| Download File |
|
| Language | English |
| Product Brand | McCulloch. Support Phone for US: Wheeled (Mowers, Tractors, Tillers, Snow Throwers) - 1-800-849-1297
McCulloch Handheld (Chainsaws, Trimmers, Blowers, Edgers) - 1-800-554-6723 All McCulloch Products - 1-800-521-8559, Chainsaw |
| Document File Type | |
| Publisher | mcculloch.com |
| Wikipedia's Page | McCulloch Motors |
| Copyright | Attribution Non-commercial |
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