50 hour Maintenance
Every 50 hours of operation (more frequently in dusty or dirty condi- tions):
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 col- lar. Remove the filler plug from the side of the gearcase and press new grease into the gearcase until the old grease is pushed out. Use only
New Grease | Old |
| Grease |
■Use a hooked wire to extract the fuel filter from inside the fuel tank. See Fig- ure 30. Remove and replace the filter element. Before reinstalling the filter, inspect the condition of the fuel line.
If damage or deterioration are noted, the unit should be removed 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 dam- aged easily.
Hooked |
Wire |
Figure 30 |
Gear Shaft Collar
Figure 29
135-hour Maintenance
MAINTENANCE
Every 135 hours of operation, re- move and clean the muffler.
WARNING!
Never operate this unit with a dam- aged or missing muffler or spark arrester! Operating with missing or damaged exhaust components is a fire hazard and could also damage your hearing.
1.Remove the spark plug boot.
2.Remove the four 4 mm engine cover screws (two in the back and two in the front of the cover) and lift the cover from the engine.
3.Remove the two 5 mm muffler screws. Remove the lower muffler screw, then lift the muffler assembly from the engine.
4.Seperate the muffler from the forward muffler shield, while observing the orientation of the components.
See Figure 31.
IMPORTANT!
If you note excessive carbon buildup, consult with an authorized servicing dealer.
8.Reassemble the muffler in the reverse order of disassembly.
Rear Muffler |
| Spark Ar- |
|
Shield |
| Forward | |
| rester Screen | ||
|
| ||
|
| Muffler | |
|
|
| |
|
|
| Shield |
|
|
| 5 mm Muffler |
|
|
| Screws |
Rear Muffler |
|
|
|
Shield Screw |
|
|
|
| Muffler |
| Lower Muffler |
|
| Screw | |
|
|
| |
Figure 31 |
|
|
|
5.Remove the spark arrester screen and clean with a stiff bristle brush.
6.Gently tap the muffler on a wood sur- face to dislodge any loose carbon.
7.Inspect the cylinder exhaust port for carbon buildup.
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