Figure 35
1. Engine oil drain plug
Note: Dispose of the used oil at a cer tified
recycling center .
6. Clean around the oil dipstic k and unscrew the
cap .
7. Slo wly pour appro ximately 80% of the
specified amount of oil into the filler tube
and c hec k the oil lev el; refer to Chec king the
Crankcase Oil in Operation , pag e 22 . Slo wly
add oil to bring the lev el to the F mark on the
dipstic k.
8. Install the dipstic k.
Servicing the Spark Plug
Chec k the spark plug after ev er y 100 operating
hours or yearly , whic hev er occurs first. R e place
if necessar y .
T ype: Champion RN14Y C (or equi v alent)
Air Gap: 0.030 inc h (0.762 mm)
Checking and Replacing the Spark
Plug
Note: T he spark plug usually lasts a long time;
ho w ev er , the plug should be remo v ed and c hec k ed
whenev er the engine malfunctions .
1. Clean the area around the spark plugs so that
foreign matter cannot fall into the cylinder
when the spark plug is remo v ed.
2. Pull the wires off of the spark plugs and
remo v e the plugs from the cylinder head.
3. Chec k the condition of the side electrode ,
center electrode , and center electrode insulator
to ensure that there is no damag e ( Figure 36 ).
Important: A crack ed, f ouled, dir ty ,
or malfunctioning spar k plug must be
r eplaced. Do not sand-blast, scrape, or
clean electr odes by using a wir e br ush
because g rit may ev entuall y r elease fr om
the plug and f all into the cylinder . T he
r esult is usuall y a dama ged engine.
Figure 36
1. Center electrode insulator
3. Air gap (not to scale)
2. Side electrode
4. Set the air g ap betw een the center and side
of the electrodes at 0.030 inc h (0.762 mm)
( Figure 36 ). Install the cor rectly g apped spark
plug and tighten the plug to 14 ft-lb (20 N ⋅ m).
5. Install the spark plug wires .
Fuel System
Maintenance
Inspecting Fuel Lines and
Connections
Chec k the fuel lines and connections ev er y 400
operating hours or yearly , whic hev er occurs first.
Inspect them for deterioration, damag e , or loose
connections .
Replacing the Fuel Filter
R e place the fuel filter ev er y 800 operating hours
or yearly , whic hev er occurs first.
1. Raise the bo x and suppor t it with the prop rod.
33
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