36
NOTE:
Good operating conditions are indicated
if plug has light coating of gray or tan deposit. A
dead white, blistered coating could indicate
overheating. A black (carbon) coating may
indicate an over-rich fuel mixture caused by a
clogged air cleaner or improper carburetor
adjustment.
4.
Reinstall the spark plug into the cylinder head.
Torque the spark plug to 18-22 ft. lbs. (24.4-29.8
N.m).
NOTE:
Do not overtighten plug. The gap may
change considerably due to the distortion of the
plug outer shell.
FIG. 19
SPARK PLUG:
Every 100 hours of operation
remove the spark
plug (See FIG. 18), check condition and reset the
gap (See FIG. 19), or replace with a new plug, as
necessary. Replace spark plugs after every 400
operating hours to assure proper engine
performance. Use a Champion
®
type RC12YC
(or equivalent) spark plug.
IMPORTANT!
Equipment to be operated in
Canada must use a resistor type spark plug in
compliance with Canadian Government
regulations.
1.
Before removing the spark plug clean the area
around the base of the plug to keep dirt and
debris out of the engine.
2.
Remove the plug and check its condition.
Replace the plug if worn, or reuse is questionable.
ENGINE MAINTENANCE
1. Oil Fill Cap
3. Oil Dipstick
2. Air Filter
4. Spark Plug
FIG. 18
IMPORTANT:
A cracked, fouled, dirty or
otherwise malfunctioning spark plug must be
replaced. Do not sandblast, scrape, or clean
electrodes by using a wire brush, because grit
may eventually release from the plug and fall into
the cylinder. The result is usually a damaged
engine.
3.
Check the gap using a wire feeler gauge.
Adjust the gap to .040 in. (1.02mm) by carefully
bending the ground electrode. (See FIG. 19)
1774
4
2
1
3
1863-1
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