Governor - Kohler 4EOZ Service

5.10 Governor

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1. Governor body
2. Pin
3. Spacer
4. Bridge
5. Spring retainer
6. Full speed spring
7. Idle speed spring
8. Cross slot nut
Figure 5-16 Governor Components
The centrifugal, mechanical governor keeps the engine
speed constant by automatically adjusting the amount
of fuel supplied to the engine according to changes in
the load. No regular service is required on the governor.
The factory adjusts the governor during run-in, and
further adjustment should not be needed unless poor
governor control develops after extended generator
usage.
Governor Construction and Function
The governor consists of two flyweights and a set of
springs that balance the centrifugal forces of the
governor flyweights.
TP-6137 5/03
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The governor is installed at the crankshaft and turns with
similar speed. If the engine operates with a decreasing
load, the engine speed will increase. The centrifugal
force spreads the governor weights and its pin pushes
the tappet bolt of the inner control lever. It pivots on the
eccentric shaft so that the injection pump pin moves
towards the position for lower fuel supply rate. During
conditions with less fuel, the engine speed decreases,
the governor pin returns to its hole, and the inner control
lever moves the injection pump pin towards the position
for higher fuel supply rate to increase the engine speed.
Consequently, the engine speed has permanent
oscillations but these are so small that only a very
sensitive revolution meter could detect them.
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Section 5 Fuel System
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