Engine Manual 21
B. Maintenance Schedule
* After rst (5) hours of operation.
** Spark plug gap to be set to 0.027 - 0.030 inches.
1
More often if operated in dusty conditions and/or over 100°F (37°C). Maintenance intervals should be performed
at half the above listed times.
2
Every 5 operating hours when engine is warm.
3
After the rst 50 hours.
Note
Following proper maintenance is critical under extreme operating conditions.
IX. Helpful Tips & Suggestions CONTINUED
After the rst
5 hours
Every 25
hours
Every 50
hours
Every 100
hours
Every 500
hours or
yearly
Clean
1
Clean
1
Check Replace
x
1
x
1
x
1
x
2
x
1
x
1
x
1
x
1,3
x
1,3
x
1
x
1
x
1
Daily/Before
each use
x
x
x
Check Oil Level
Replace Oil*
Replace Oil Filter*
Replace Outer
(Primary) Filter
Replace Inner
(Secondary) Filter
Replace Spark Plugs**
Replace Fuel Filters
Clean Oil Cooler Fins
Clean Cylinder Cooling
Fins
Clean Debris Screen
and Cooling Fan
Check/Adjust Valves
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