Homelite UT903650 Spark Plug Maintenance, Cleaning the Exhaust Port and Muffler, Spark Arrestor

MAINTENANCE

SPARK PLUG MAINTENANCE

See Figure 15.

The spark plug must be properly gapped and free of deposits in order to ensure proper engine operation. To check:

Remove the spark plug cap.

Clean any dirt from around base of spark plug.

Remove spark plug using wrench (not included).

Inspect spark plug for damage, and clean with a wire brush before reinstalling. If insulator is cracked or chipped, spark plug should be replaced.

NOTE:  If replacing, use the following recommended spark plugs or equivalent:  NGK BR-6HS or Champion RL86C.

Measure plug gap. The correct gap is 0.028−0.031 in.

(0.7-0.8 mm). To widen gap, if necessary, carefully bend the ground (top) electrode. To lessen gap, gently tap ground electrode on a hard surface.

Seat spark plug in position; thread in by hand to prevent cross-threading.

Tighten with wrench to compress washer. If spark plug is new, use 1/2 turn to compress washer appropriate amount. If reusing old spark plug, use 1/8 to 1/4 turn for proper washer compression.

NOTE:  An improperly tightened spark plug will become very hot and could damage the engine.

CLEANING THE EXHAUST PORT AND MUFFLER

Depending on the type of fuel used, the type and amount of lubricant used, and/or your operating conditions, the exhaust port and muffler may become blocked with carbon deposits. If you notice a power loss with your gas-powered products, you may need to remove these deposits to restore perfor- mance. We highly recommend that only qualified service technicians perform this service.

SPARK ARRESTOR

See Figure 16.

Inspect the spark arrestor for breaks or holes. Replace if necessary. To purchase a replacement spark arrestor contact Homelite customer service at 1-800-242-4672.

Use a brush to remove carbon deposits from the spark arrestor screen as needed.

DRAINING FUEL TANK/CARBURETOR

See Figures 17 - 18.

To help prevent gum deposits in the fuel system, drain the fuel from the tank and carburetor before storing.

DRAINING THE FUEL TANK

Turn the engine switch OFF ( O ).

Turn the fuel valve to the OFF position.

Remove the fuel line from the petcock by squeezing the ends of the retaining clip and sliding the fuel line off.

Install one end of a drain line over the petcock, and place the other end in a fuel container large enough to catch the fuel being drained from the tank.

Turn the fuel valve to the ON position.

When the fuel has drained from the tank, close the fuel valve and reinstall fuel line on petcock.

DRAINING THE CARBURETOR

Turn the engine switch OFF ( O ).

Turn the fuel valve to the OFF position.

Position a suitable container under the carburetor drain screw to catch fuel; loosen the screw.

Allow fuel to drain completely into container.

Retighten drain screw.

NOTE:  Consult hazardous waste management guidelines in your area for the proper way to dispose of used fuel.

REPLACING FUEL FILTER

See Figure 19.

Occasionally the fuel filter may become clogged and need replacing. To purchase a replacement fuel filter contact Husky customer service at 1-800-242-4672.

NOTE:  Fuel tank must be empty before replacing fuel filter. Run unit until tank is empty, if needed, or inspect filter prior to fill-up.

To replace:

Turn the fuel valve to the OFF position.

Remove the fuel line from both sides of the filter by squeezing the ends of the retaining clip with pliers.

Slide the fuel line off.

Replace with new fuel filter.

Reinstall fuel lines to new fuel filter.

Turn the fuel valve to the ON position.

TRANSPORTING

Turn engine switch OFF ( O ).

Turn the fuel valve to the OFF position.

Make sure engine and exhaust of unit is cool.

Keep unit level to prevent fuel spillage.

Do not drop or strike unit or place under heavy objects.

Page 15 — English