10/15-Hour Maintenance
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Figure 29
Every 10 to 15 hours of operation:
nRemove and clean the spark plug. Adjust the spark plug electrode gap to 0.024
0.028 inch
NOTE:
The NGK CMR5H also meets the requirements for electro magnetic compliance (EMC).
CAUTION!
Before removing the spark plug, clean the area around the plug to prevent dirt and debris from getting into the engine’s internal parts.
50-Hour Maintenance
Every 50 hours of operation
(more frequently in dusty or dirty conditions):
nRemove and clean the cylinder cover and clean grass and dirt from the cylinder fins.
nRemove the cutting attachment, cutting attachment holder and gear shaft collar. Remove the filler plug from the side of the gear case and press new grease into the gear case until old grease is pushed out. Use only
nLubricate main shaft splines.
nUse a hooked wire to extract the fuel filter from inside the fuel tank.
See Figure 31.
CAUTION!
Make sure you do not pierce the fuel line with the end of the hooked wire. The line is delicate and can be damaged easily.
Remove and replace the filter element.
Before reinstalling the new filter element, inspect the condition of all the fuel system components (fuel
New
Grease
Old
Grease
Gear Shaft
Collar
Figure 30
Hooked
Wire
Filter Element
Figure 31
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