10/15-Hour Maintenance
Every 10 to 15 hours of operation:
■Remove and clean the spark plug. Adjust the spark plug electrode gap to 0.6 mm. If the plug must be replaced, use a NGK BMR6A or equivalent spark plug of the correct heat range.
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
0.6 mm
Clean the spark plug and check the
gap at the electrode.
CAUTION!
Incorrect spark plug installation can result in serious engine damage.
50-Hour Maintenance
Every 50 hours of operation (more frequently in dusty or dirty conditions):
■Remove and clean the cylinder cover and clean dirt and debris from the cylinder cooling fins.
■Remove the sprocket cover and inspect the sprocket for excessive dirt, debris, or wear. Remove the guide bar and clean out the guide bar groove. If the sprocket is excessively worn, replace it with a new one.
Inspect the
sprocket
■Lubricate the gear case. To perform this operation, first remove the gear case from the upper outer tube as follows.
•Loosen the gear case clamp bolt.
•Remove the index bolt from the gear case.
•Slide the gear case out of the tube.
■Using a
Gear Case Clamp
Index
Bolt
Grease Fitting
Clean or replace fuel filter
■Use a hooked wire to extract the fuel filter from inside the fuel tank. Inspect the fuel filter element for signs of contamination. Replace it with a new one if required. Before reinstalling the filter, inspect the fuel line. If you find damage or deterioration, remove the unit from service until it can be inspected by a
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.
Hooked Wire |
Filter Element |
16
