Carburetor Troubleshooting And Adjustments; Battery Charging; Fuel Filter - Kohler MAGNUM 8 HP Owner's Manual

3. Check gap (0.025") using a wire feeler gauge.
Adjust the gap as necessary by carefully bending
the ground electrode. See Figure
7.
4.
Reinstall the spark plug into the cylinder head.
Torque the spark plug to 78-22 ft. Ib.
-/"
u
Ground
Electrode
0.025"
Figure
7,
Servicing Spark Plug,
Battery Charging
a
WARNING: Explosive Gas!
Batteries produce explosive hydrogen gas while being
charged. To prevent a fire or explosion, charge
batteries only in well ventilated areas. Keep sparks,
open flames, and other sources of ignition a way from
the battery at all times. Keep batteries out of the reach
of children. Remove all jewelry when servicing
batteries.
Before disconnecting the negative (-) ground cable,
make sure all switches are OFF: If ON, a spark will
occur at the ground cable terminal which could cause
an explosion if hydrogen gas or gasoline vapors are
present.
On engines equipped with an alternator charging
system, disconnect plug from rectifier-regulator prior to
charging battery.
Fuel Filter
Some engines are equipped with an in-line fuel filter.
Periodically inspect the filter and replace when dirty.
Use a genuine Kohler filter.
Reduction Gear Units
On engines equipped with a reduction gear unit,
remove the oil plug on lower part of cover every
50 hours of operation to check oil level. With the
engine level, the oil level of the unit should be up to the
bottom of the oil plug hole. To add oil, remove the
vented plug at the top of the unit. Use the same weight
and grade of oil as used in the engine crankcase.
Carburetor Troubleshooting
and Adjustments
Kohler M8
-
M16 engines are equipped with one of
three types of carburetors; Kohler adjustable main jet,
Walbro adjustable main jet, or Walbro fixed main jet.
Emissions certified engines will have fixed jet
carburetors. Walbro carburetors have the brand name
embossed in the side of the body casting, near the top.
The carburetor is designed to deliver the correct
fuel-to-air mixture to the engine under all operating
conditions. The main fuel and idle fuel needles on
adjustable jet carburetors are set at the factory and
normally do not require further adjustment. On fixed jet
carburetors, the low idle fuel needle is also set at the
factory and normally does not need further adjustment.
The main fuel jet is calibrated and installed at the
factory and is not adjustable.
Troubleshooting
If engine troubles are experienced that appear to be
fuel system related, check the following areas before
adjusting the carburetor.
Make sure the fuel tank is filled with clean, fresh
gasoline.
Make sure the fuel tank cap vent is not blocked
and that it is operating properly.
If the fuel tank is equipped with a shut-off valve,
make sure it is open.
If the engine is equipped with an in-line fuel filter,
make sure it is clean and unobstructed. Replace
the filter if necessary.
Make sure fuel is reaching the carburetor. This
includes checking the fuel lines and fuel pump for
restrictions or faulty components, replace as
necessary.
Make sure the air cleaner element is clean and all
air cleaner element components are fastened
securely.
If, after checking the items listed above, the engine is
hard to start, runs roughly, or stalls at low idle speed, it
may be necessary to adjust or service the carburetor.
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