Figure 7-3. Shutdown Control Solenoid (3.5kW-7kW)
2. Lift the solenoid and remove the plunger.
3. Replace the solenoid and retaining bracket and
the main fuel needle. (See Carburetor Adjustment).
readjust
7-4. CRANKCASE BREATHER (3.5kW, 4.5kW)
7-4.1. General. Reed type breathers are used to maintain a
slight vacuum in the crankcase. A clogged or pinched crank-
case breather, or faulty reed assembly can cause positive
pressures to build up in the crankcase resulting in unseating
of the dipstick and oil leakage thru the oil fill tube. See
Figure 7-4, 7-5 or 7-6.
STUD
FILTER
GASKET
\
,
VALVE COVER
Figure 7-4. Crankcase Breather Assembly (3.5kW)
7-5. GOVERNOR (3.5kW, 4.5kW)
7-5.1. General. All Kohler Single Cylinder Engines are
equipped with centrifugal flyweight mechanical type gov-
BREATHER PLATE
VALVE COVER
COVER GASKET
BREATHER
HOSE
Figure 7-5. Crankcase Breather Assembly (4.5kW Single)
COVER GASKET
BREATHER PLATE
GASKET -
Figure 7-6. Breather Assembly (4.5kW Twin)
ernors. The governor gear flyweight mechanism is mounted
within the crankcase and driven off a gear on the camshaft.
In operation,
centrifugal force causes the flyweights to
move outward with increase in speed and inward with de-
creasing speed. As the flyweights move outward, they force
the rod portion of the assembly to push outward. Tension
of the governor spring pulls the flyweights back inward
with decrease in engine speed. The rod, in turn, contacts
a tab on the governor cross shaft causing it to rotate with
changing speed. One end of the cross shaft protrudes thru
the side of the crankcase. Thru external linkage, the action
of the cross shaft is transmitted to the throttle (or butter-
fly) valve in the carburetor. When the engine is at rest, the
tension of the governor spring should hold the throttle
valve in open position.
7-4
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