Zenoah CHAIN SAWS G2500 - Manual (Page 16)

G2500
GB-16
7. Muffler
If you do not attach the muffler correctly, after engine starts,
the muffler will be loosen and the hightemperature exhaust
gas spout. After cleaning the muffler, pay attention to fit up
the muffler according to the explanation as follows.
1. Muffler body, muffler cover and baffle will be combined
correctly.
2. Be sure the gasket is not broken. If it is broken, change to
the new one.
3. Before tightening the screw, rub the gross on it.
4. After making a test run, re-tighten the screw (TORQUE:
6.9-7.8 N.m./70-80 kg-cm)
■ 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 / 25AP
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
Appropriate gauge checker
Make the shoulder round
Depth gauge standard
0.025″″″″″ (0.64 mm)
WARNING
WARNING
WARNING WARNING
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 inside the muffler.