Maintenance Of Saw Chain And Guide Bar - Zenoah G4101 Owner's Manual

2. Fuel filter
(a) Using a wire hook, take out the filter from the filler port.
(b) Disassemble the filter and wash with gasoline, or
replace with a new one if needed.
Note:
• After removing the filter, use a pinch to hold the end of the suction pipe.
• When assembling the filter, take care not to allow filter fibers or dust
inside the suction pipe.
3. Oil tank
With a wire hook, take out the oil filter through the filler
port and clean in gasoline. When putting the filter back
into the tank, make sure that it comes to the front right
corner. Also clean off dirt in the tank.

11. Maintenance of Saw Chain and Guide Bar

■ Saw Chain
It is very important for smooth and safe op-
eration to always keep the cutters sharp.
The cutters need to be sharpened when:
• Sawdust becomes powder-like.
• You need extra force to saw in.
• The cut path does not go straight.
• Vibration increases.
• Fuel consumption increases.
Cutter setting standards:
Be sure to wear safety gloves.
Before filing:
• Make sure the saw chain is held securely.
• Make sure the engine is stopped.
• Use a round file of proper size for the chain.
Chain type:
File size:
01-G4101_GB_306＿三.indd 13
Fuel filter
Oil filter
95VPX
3/16in (4.8mm)
4. Spark plug
0.65 mm
Champion : RCJ-7Y
NGK : BPM7Y or BPM7A
Clean the electrodes with a wire brush and reset the gap
to 0.65 mm as necessary.
5. Sprocket
Check for cracks and for excessive wear interfering with
the chain drive. If the wear is considerable, replace it
with new one. Never fit a new chain on a worn sprocket,
or a worn chain on a new sprocket.
Place the file on the cutter and push straight forward.
Keep the file position as illustrated.
After each cutter has been filed, check the depth gauge
and file it to the proper level as illustrated.
Appropriate gauge checker
0.025" (0.64 mm)
Depth gauge standard
G4101
G
B
Make the shoulder
round
GB-13
13.6.25 5:29:15 PM