Figure 25
1. Spark plug wire
2. Clean around spark plug and remo v e plug
from cylinder head.
Important: R eplace a crack ed, f ouled,
or dir ty spar k plug . Do not sand blast,
scrape, or clean electr odes because engine
dama ged could r esult fr om g rit entering
the cylinder .
3. Set air g ap at 0.028-0.032 inc h ( Figure 26 ).
Install cor rectly g apped spark plug and tighten
fir mly to 17 ft.-lb .
Figure 26
Fuel System
Maintenance
Cleaning the Fuel Filter
Initially , clean fuel filter after the first 25 hours of
operation; thereafter clean after ev er y 50 hours
operation.
1. Close fuel shut off v alv e and unscrew bo wl
from filter body ( Figure 27 ).
Figure 27
1. Shut-off valve 2. Bowl
2. Clean bo wl and filter in clean g asoline and
install.
Electrical System
Maintenance
Servicing the Interlock
Switch
Use the follo wing procedure if the switc h needs
adjustment or re placement.
1. Mak e sure the engine is off and traction lev er
is Diseng ag ed.
2. Eng ag e traction lev er until it contacts neutral
stop ( Figure 28 ).
Figure 28
1. Traction lever 3. Interlock switch
2. Neutral stop
4. .032" Gap
26
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