9
1
1
3. Do not sand-blast or bead-blast the spark
plug. Clean by scraping or wire brushing,
and then washing in a commercial solvent.
4. Using a wire gage, check and set the gap
(A, Figure 1-3) per Section 12 -
Specifications.
Figure 1 - 3
5. Re-install spark plug and torque to values
listed in Section 12 - Engine
Specifications.
6. Connect spark plug wire.
Cooling System
Dirt or debris can restrict air flow and cause the
engine to overheat, resulting in poor
performance and reduced engine life. Continued
operation with a clogged cooling system can
cause severe overheating and possible engine
damage. Clean these areas (A, Figure 1-4)
yearly or more often when dust or airborne
debris is present.
NOTICE: Do not use water to clean the engine.
Water could contaminate the fuel system. Use a
brush or dry cloth to clean the engine.
Figure 1 - 4
Charging Battery
1. Clean the battery of all dirt and corrosion.
2. Clean, then lightly grease the terminals.
3. Bring the battery to full charge using a
taper charge (automatically reduces
charge rate).
NOTE: Do not exceed a charge rate of 1/10
ampere for every ampere of battery rating.
Consult the battery manufacturer for maximum
charge recommendations.
NOTE: If the battery gets hot to the touch or is
spitting acid (gassing) excessively, unplug the
charger periodically.
4. With the battery fully charged, check the
specific gravity readings of each cell with a
temperature-compensated Battery
Hydrometer (Figure 1-5). All readings
should be above 1.250 (compensating for
temperature). If the readings vary by
0.050 or if all cells read less than 1.225,
replace the battery.
Figure 1 - 5
WARNING
Running engines produce heat.
Severe burns can occur on contact.
• Allow muffler, engine cylinder fins, and radiator
to cool before touching.
• Remove accumulated combustibles from muf-
fler area and cylinder area.
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