Spark Plug
CAUTION!
Never allow dirt or debris to enter the cylinder bore! Before remov- ing the spark plug, thoroughly clean the spark plug and cylinder head area! Allow the engine to cool before servicing the spark plug! Cylinder threads can be damaged by tightening or loosening the spark plug while the engine is hot!
1.Use the spark plug wrench to remove the spark plug. See Figure 14.
2.Clean and adjust the spark plug gap to 0.6mm (0.024 in.). If the plug must be replaced, use a NGK CMR5H or equivalent type plug of the cor- rect heat range.
3.Install the spark plug
Cooling System
CAUTION!
The engine is cooled by air drawn into the air intake cover on the blower housing. The blower fan then pushes the cooling air through an opening in the fan housing, forcing it past the cylinder cooling fins. Failure to keep the cooling system and its passages clear of debris will likely result in engine overheating, a major cause of serious engine problems that can lead to failure.
•Remove all dirt and debris from blower exterior and the engine. Check the cooling fins and air cleaner for clogging and clean as necessary.
1.Remove engine cover.
2.Clean cylinder fins to allow cooling air to pass freely.
•Carefully remove any accumulations of dirt or debris from the muffler and fuel tank. Dirt
Counter-
clockwise to remove.
Clean the spark plug
and check the gap
0.6mmat the electrode. (0.024 in.)
Figure 14 | NGK CMR5H |
15