Exhaust System; Spark Plug - Echo PB-2155 Operator's Manual

EXHAUST SYSTEM

Level 3.
Tools Required: Phillips Screwdriver. Scrench. 10 mm Open end
wrench. Soft metal brush. Wooden carbon scraper. 3 mm Allen
wrench, 4 mm Allen wrench.
Parts Required: Spark arrester screen, gasket.
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 arrester screen must be checked periodically.
1. Remove spark plug and engine cover (seven screws).
2. Remove muffler.
3. Clean cylinder exhaust port being careful not to scratch cylinder or
piston, using a wooden or plastic scraper.
4. Remove spark arrester cover, exhaust diffuser, gasket and spark
arrester screen from muffler. Replace screen if plugged with
carbon deposits.
5. Install spark arrester screen, gasket, diffuser and cover.
6. Be sure gasket seals muffler spark arrestor screen to muffler.

SPARK PLUG

Level 2.
Tools Required: 19 mm Spark Plug deep socket, Feeler gauge. Prefer-
ably a wire gauge.
Parts Required: Spark Plug, Champion RCJ-7Y
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.
P B
OWER LOWER
O ' M
PERATOR S ANUAL
Muffler
Exhaust diffuser
Spark arrester cover
0.65 mm
19
Spark arrester
screen
gasket