Kohler MAGNUM M18

SECTION 3
PERIODIC MAINTENANCE
CHECK SPARK PLUGS
Every 100 operating hours, remove the spark plugs,
check condition and reset gaps, or replace with new
plugs as necessary. Refer to Figure 3-6.
Wire Gauge
Spark Plug
0.035" Gap
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Ground Electrode
Figure 3-6. Servicing Spark Plugs.
. Before removing spark plugs, clean the area
around the base of plugs to keep dirt and debris
out of engine.
2. Remove the plugs and check conditions. Replace
the plugs if wom or if reuse is questionable.
Use Champion® Type RV17YC or equivalent spark
plugs.
NOTE: Do not clean the spark plugs in a machine
using abrasive grit. Some grit could re-
main in spark plugs and enter the engine
causing extensive wear and damage.
3. Check gaps using a wire feeler gauge. Adjust
gaps to 0.035" by carefully bending the ground
electrode.
4. Reinstall spark plugs into cylinder heads. Torque
plugs to 10/15 ft. Ib.
IGNITION SYSTEM SERVICE
Magnum engines are equipped with a dependable
electronic magneto ignition system. Other than peri-
odically checking/replacing the spark plugs, no main-
tenance, timing, or adjustments are necessary or
possible with this system.
CHECK FUEL FILTER
Fuel Filter
Figure 3-7. In-line Fuel Filter.
Some engines are equipped with an in-line fuel filter.
Visually inspect the filter periodically. Replace when
dirty with a genuine Kohler filter.
SERVICE STARTER MOTOR DRIVE
Every 500 operating hours, or annually (whichever oc-
curs first), clean and lubricate tne drive splines of the
Bendix-drive electric starter motor. Refer to
Figure 3-8.
S Splines
Drive Shaft
Drive Pinion
Stop Gear
Spacer
Dust Cover NS ©з,
Spacer ee
Spring E че
Dust Cover
Stop Nut
Figure 3-8. Starter Drive Components.
1. Remove starter from crankcase, (Refer to the
“Disassembly” Section.)
2. Remove dust cover, stop nut, stop gear spacer,
spring, Gust cover spacer, and drive pinion.
3.5