POWER BLOWER

OPERATOR'S MANUAL 19

SPARK PLUG

Level 2.

Tools required: 3/4" Spark Plug deep socket, Feeler gauge (preferably a wire gauge),

Parts Required: Spark Plug, NGK BPM-7Y, P/N 99944500071

1.Remove spark plug (LN models; spark plug cover and 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.

4.Tighten spark plug to 145-155 kg/cm (125-135 in. lb.).

5.Install spark plug cover (LN models).

IMPORTANT

Always reinstall spark plug cover on LN models, otherwise engine cooling is greatly reduced, and will cause engine failure.

0.65mm (0.026 in.)

COOLING SYSTEMS CLEANING

Level 3.

Tools required: 25mm-50mm (1in.-2in.) medium bristle paint brush, Cross Head Screwdriver, Pointed Wood Stick.

Parts Required: None, if you are careful.

IMPORTANT

To maintain proper engine operating temperatures, cooling air must pass freely through the cylinder fin area. This flow of air carries combustion heat away from the engine.

Overheating and engine seizure can occur when:

•Air intakes are blocked, preventing cooling air from reaching the cylinder.

•Dust and grass build up on the outside of the cylinder. This build up insulates the engine and prevents the heat from leaving.

Removal of cooling passage blockages or cleaning of cooling fins is considered “Normal Maintenance”. Any failure attributed to lack of maintenance is not warranted.

Cleaning Grill

1.Remove accumulated debris from intake grill between backpack frame and blower housing.

INTAKE

GRILL