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Maintenance and care
Cooling system maintenance
IMPORTANT
To maintain proper engine operating temperature, cooling air must pass freely through the cylinder fin area. This flow of air car-
ries combustion heat away from the engine.
Overheating and engine seizure can occur when:
Air intakes are blocked, preventing cooling air from reaching the cylinder,
or
Dust and grass build up on the out side of the cylinder. This build-up insulates the engine and prevents the heat from leaving.
Removal of cooling passage blockages or cleaning of cylinder fins is considered "Normal Maintenance". Any resultant failure
attributed to lack of maintenance is not warranted.
1. Air intake
1. Spark plug
Exhaust system
2. Cylinder fins
Tools required: 4mm x 130 mm (5") long hex wrench, cleaning
brush
Parts required: None, if you are careful.
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
22
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