7-5.2. Adjustments. The governor maintains engine speed
when changing loads and limits the engine speed. Initial
adjustment is made at the factory and should not be re-
quired in the field unless the linkage works loose or becom-
es disconnected. Speed adjustment should be made if the
engine surges when changing loads or if speed drops consid-
erably when a normal load is applied.
A. Initial Governor Adjustment (Figure 7-7 or 7-8).
1. With engine ‘stopped, loosen (do not remove) the arm
retaining nut which secures the governor arm to the cross
Figure 7-8.
Governor Components and Adjustment Points
(4.5kW Single)
Figure 7-7.
Governor Components and Adjustment Points (3.5kW)
2. Grasp the end of the shaft with pliers and turn the shaft
as far as possible in counterclockwise direction until the
internal tab on the shaft stops against the governor gear
mechanism.
Hold shaft in this position, pull governor
arm all the way from the carburetor then retighten the arm
retaining nut.
B. Governor Speed Adjustment.
1. If overspeed or underspeed condition is suspected, check
speed with a tachometer or frequency meter at rated load.
2. Loosen speed adjusting nuts to decrease speed and
tighten speed adjusting nuts to increase speed.
C. Sensitivity Adjustment. If the speed drops considerably
when a normal load is applied, the governor may not be
sensitive enough.
If speed surging occurs with changing
load, the governor may be too sensitive.
1. To make the governor MORE sensitive, increase the
spring tension by moving the spring hooks into holes spaced
further apart.
2. To make the governor LESS sensitive, decrease the
spring tension by moving the spring hooks into holes
spaced closer together.
7-6. GOVERNOR HUNTING CHECKS (4.5 kW SINGLE
ONLY).
Governor hunting is a periodic frequency variation. If the
variation (hunting) is audible to the unaided ear, it is not
acceptable. Use the checklist below to help maintain
proper governor operation. The items in this list may be
used singly or in combination to achieve smoothest pos-
sible operation.
NOTE
Due to variances in generator output wave
shape, not all pointer type frequency meters are
compatible.
1. Set the point gap to 0.020 in. (0.51 mm) with a feeler
gauge and adjust the carburetor for peak performance.
2. With the engine not running check for free governor
linkage movement from idle to full throttle. (Note: Remove
excess paint from governor spring and dampening spring
and make sure choke wires do not interfere.)
3. With the engine shut down the throttle will be in wide
open position. Adjust the governor linkage so that approxi-
mately l/32” (0.79mm) space exists between the throttle
lever and carburetor body. (Note: This can be done by
sight, no fine measurement is necessary.)
7-5
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