Frequency
Items
Every
time
First
month or
10 hrs of
operation
Thereafter,
every 3 months
or 30hrs of
operation
Every 6
months or 50
hrs of
operation
Every year
or 100 hrs
of
operation
Engine oil
Check-
Refill
√
Change
√
√
Air filter
element
Check
√
Clean
√
Change
√
Spark plug
Clean-
adjust
√*
Spark
arrester
Clean
√
Valve
clearance**
Check-
adjust
√
Fuel hose
Check
Every 2 years (change if necessary)
Cylinder
head, Piston
Remove
carbon
deposits
Every 125 hours
