muffler spark arrestor

IMPORTANT

Carbon deposits in muffler will cause a drop in engine output and overheating. Spark arrestor screen must be checked periodically.

1.Remove air filter cover and remove spark plug lead.

2.Remove two guide bar nuts and remove sprocket guard.

3.Remove three muffler cover screws and remove muffler cover.

4.Remove spark arrestor screen cover, gaskets, and screen from muffler body.

5.Clean carbon deposits from muffler components.

NOTE

When cleaning carbon deposit, be careful not to damage the catalytic element inside muffler.

6.Replace screen if it is cracked, plugged, or has holes burned through.

7.Assemble components in reverse order.

Exhaust Port Cleaning

Level 2.

Tools required: 4 mm Hex Wrench., Wood or plastic scraper

Parts Required: As needed: Muffler Gasket

1.Remove air filter cover and remove spark plug lead.

2.Loosen chain tension, release chain brake, and remove two guide bar nuts, clutch cover, guide bar, and chain.

3.Remove muffler cover screws and remove muffler cover. (See

“Guide Bar and Saw Chain – Install/Remove” in Instruction Manual for detailed disassembly instructions.)

NOTE

Some units may have a metal shim (A) between the muffler cover and clutch cover. Make sure shim is installed properly when reassembling parts.

4.Place piston at top dead center.

5.Remove muffler nuts (B), washer sets (C), eyeplate (D), muffler (E), and muffler gasket (F). Check parts for wear or damage, and replace if necessary.

A

F

E

D

B C

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