Homelite UT10519 - Manual (Page 35)

Page 35 — English
MAINTENANCE
CLEANING THE ENGINE
See Figures 67 - 68.
Clean the cylinder fins and flywheel fins with
compressed air or a brush periodically. Danger-
ous overheating of the engine may occur due to
impurities on the cylinder.
WARNING
Never run the saw without all the parts, including
the clutch 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 69.
Check the fuel filter periodically. If contaminated or
damaged, have fuel filter replaced by an authorized
service center.
REPLACING THE SPARK PLUG
See Figure 70.
This engine uses a Champion RCJ6Y with .025 in.
electrode gap. Use an exact replacement and
replace every 50 hours or more frequently, if
necessary.

Loosen the spark plug by turning it counter-
clockwise with a wrench.
 Remove the spark plug.
 Hand 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.
Fig. 68
Fig. 69
Fig. 70
Fig. 67
STOP
clean
cylindeR
Fins
clean
Flywheel Fins
FUel FilteR