Echo PB-625 Operator's Manual page 25

1. Air intake
1. Spark plug
Exhaust system
1. Spark arrester screen
3. Spark arrester cover
2. Cylinder fins
2. Gasket
Maintenance and care
Cleaning Grill and Cylinder Fins
1. Remove accumulated debris from intake grill between back-
pack frame and blower housing.
2. Disconnect spark plug lead from spark plug.
3. Remove engine cover - 5 screws.
4. Clean cylinder fins to allow cooling air to pass freely.
5. Reassemble parts in reverse order.
IMPORTANT
Do not over-tighten screws, otherwise mounting holes may be-
come stripped.
Spark Arrester Screen
Tools required: Cross Head Screwdriver, 4 mm Hex Wrench,
Soft metal brush
Parts required: Spark arrester screen, Gasket
IMPORTANT
Carbon deposits in silencer will cause a drop in engine output
and overheating. Spark arrester screen must be checked peri-
odically.
1. Disconnect spark plug lead from spark plug.
2. Remove engine cover - 5 screws.
3. Remove spark arrester cover , gasket , and spark arrester
screen from silencer. Replace screen if plugged with carbon
deposits.
4. Install spark arrester screen, gaskets, and cover.
5. Install engine cover.
Silencer and Exhaust Port
Tools required: 4 mm Hex Wrench, 5 mm Hex Wrench, Wood-
en or plastic scraper
Parts required: Gasket
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