10/15-Hour Maintenance
Clean the
spark plug and
check the gap
Figure 27
Every 10 to 15 hours of operation:
Remove and clean the spark plug. Adjust the spark plug electrode gap to 0.024 - 0.028 inch (0.6 - 0.7 mm). If the spark plug must be replaced, use only an NGK BPMR6A or equivalent resistor type spark plug of the correct heat range. See Figure 27.
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 cylin- der 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 29.
CAUTION!
Make sure you do not pierce the fuel line with the end of the hooked wire. The line is delicate and can be dam- aged 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 28
Hooked | Filter Element |
Wire |
|
Figure 29
15