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EXHAUST SYSTEM
Level 3.
Tools Required: Phillips Screwdriver, 4mm Allen wrench, Soft metal
brush. Wooden carbon scraper.
Parts Required: Spark arrestor screen P/N 14586240630, gasket P/N
14586642031.
Muffler and Exhaust Port
IMPORTANT
Carbon deposits in cylinder exhaust port and muffler will cause a
drop in engine output and overheating. Muffler exhaust port and
spark arrestor screen must be checked periodically.
1. Remove spark plug and engine cover (three screws).
2. Remove muffler (D).
3. Clean cylinder exhaust port being careful not to scratch cylinder
or piston, using a wooden or plastic scraper.
4. Remove spark arrestor cover (A), gasket (B) and spark arrestor
screen (C) from muffler. Replace screen if plugged with carbon
deposits.
5. Install spark arrestor screen, gasket, and cover.
6. Be sure gasket seals muffler spark arrestor screen to muffler.
SPARK PLUG
Level 2.
Tools Required: 3/4" Spark Plug deep socket, Feeler gauge. Prefer-
ably a wire gauge.
Parts Required: Spark Plug, NGK BPM-7Y, P/N 99944500071
1. Remove spark plug and check for fouling, worn and rounded
center electrode.
2. Clean the plug or replace with a new one. DO NOT sand blast to
clean. Remaining sand will damage engine.
3. Adjust spark plug gap by bending outer electrode.
0.65 mm
(0.026 in.)
B
A
D
C
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