Zenoah GZ3500T - Manual (Page 15)

GZ3500T
GB-15
G
B
7. Muffler
Regularly inspect the muffler for loose fastening screws,
damage and rust. If you find that exhaust gas leaked out,
Please check or repair in the repair specialty store. At the
same time, inspect also the spark arrester.
■ Saw Chain
It is very important for smooth and safe operation 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)
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.
8. Maintenance of Saw Chain and Guide Bar
WARNING
WARNING
WARNING
9. Exhaust port
Wipe away any carbon buildup after every 100 hours of use in
the repair specialty store. Wipe away any carbon buildup on
the muffler exhaust vent and the cylinder exhaust port at the
same time.
WARNING
Appropriate gauge checker
Depth gauge standard
0.025″″″″″ (0.64 mm)
Make the shoulder round
Right after stopping the engine, do not touch the muffler
with one's bare hands. It will cause to burn your hands.
If carbon clogs between the muffler, it will cause the poor-out-
put and the trouble in starting. After each 100 hours, check
and clean the muffler in the repair specialty store.