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designed purpose. Sustained high-load or high-temperature operation, or use in unusually wet or dusty
conditions, will require more frequent service.
REGULAR SERVICE PERIOD
（
2
）
ITEM
Performed at every indicated month or
operating hour interval, whichever
comes first.
Before
each
use
First
month
or 20
Hrs.
Every3
months
or 50
Hrs.
Every6
months
or 100
Hrs.
Every
year or
300
Hrs
Check
○
●
Engine oil
Change
○
○
Check
○
●
Air cleaner
Clean
○
(1)
●
Sediment cup Clean
○
Clean-Adjust
○
●
Spark plug
Replace
○
●
Spark arrester Clean
○
●
Idle speed Check-Adjust
○
●
Valve clearance Check-Adjust
○
●
Combustion
chamber
Clean After every 500 Hrs.
●
Fuel tank and
filter
Clean
○
●
Fuel tube Check
Every 2 years(replace if necessary)
(1) Service more frequently when used in dusty areas.
(2) For commercial use, log hours of operation to determine proper maintenance intervals.
Engine Oil Change
Drain the oil while the engine is warm to assure rapid and complete draining.
1 Remove the drain plug and sealing washer, remove the oil filler cap, and drain the oil.
2 Reinstall the drain plug and sealing washer. Tighten the plug securely.
3 Refill with the recommended oil and check the oil level.
Wash your hands with soap and water after handling used oil.
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