Homelite UT10517/18 manual Cleaning the Engine, Checking the Fuel Filter, Replacing the Spark Plug

maintenance

CLEANING THE ENGINE

See Figures 68 - 69.

Clean the cylinder fins and flywheel fins with compressed air or a brush periodically. Dangerous overheating of the engine may occur due to impurities on the cylinder.

WARNING

Never run the saw without all the parts, including the drivecase cover and starter housing, securely in place.

Because parts can fracture and pose a danger of thrown objects, leave repairs of the flywheel and clutch to factory trained authorized service center personnel.

Note:  If you notice a power loss with the gas-powered tool, the exhaust port and muffler may be blocked with carbon deposits. These deposits may need to be removed to restore performance. We highly recommend that only qualified service technicians perform this service.

CHECKING THE FUEL FILTER

See Figure 70.

Check the fuel filter periodically. Replace it if contaminated or damaged.

REPLACING THE SPARK PLUG

See Figure 71.

This engine uses a Champion RCJ-4 with .025 in. electrode gap. Use an exact replacement and replace every 50 hours or more frequently, if necessary.

nLoosen the spark plug by turning it counterclockwise with a wrench.

nRemove the spark plug.

nHand thread the new spark plug, turning it clockwise. Tighten securely with wrench.

Note:  Be careful not to cross-thread the spark plug. Cross-threading will seriously damage the cylinder.

clean

cylinder­

fins

Fig. 68

clean flywheel

fins

Fig. 69

fuel filter

Fig. 70

Fig. 71

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