Maintenance Of Saw Chain And Guide Bar - Zenoah G3800 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.

8. 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: 91VG
File size: 5/32 in (4.0 mm)
Fuel filter
3. Spark plug
0.6 ~ 0.7 mm
Clean the electrodes with a wire brush and reset the gap to
0.65 mm as necessary.
4. 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
91VG .025" " " " " (0.64 mm)
Depth gauge standard
G3800
Champion
RCJ-7Y
G
B
Make the shoulder round
GB-13