Echo PB-620ST - Manual (Page 18)

18
A
B
C
exhaust system
Spark Arrestor Screen
Level 2.
Tools required: Cross head screwdriver, soft metal brush
Parts Required: Spark arrestor screen, Gaskets (3)
IMPORTANT
Carbon deposits in muffler will cause a drop in engine output and
overheating. Spark arrestor screen must be checked periodically.
1. Remove spark plug lead from spark plug, and remove engine or
muffler cover (5 screws).
2. Remove spark arrestor cover (A), gaskets (B) and spark arrestor
screen (C) from muffler.
3. Clean carbon deposits from muffler components.
NOTE
When cleaning carbon deposits, be careful not to damage the cata-
lytic element inside muffler.
4. Replace screen if it is cracked, plugged, or has holes burned
through.
5. Install engine cover or muffler cover and attach spark plug lead.
Cleaning Cylinder Fins
1. Disconnect spark plug lead (A), and pull lead out of upper cover
clamp and lower cover clamp.
2. Remove 5 screws and remove engine cover (B).
3. Clean cylinder fins (C) to allow cooling air to pass freely.
B
C
A