Westerbeke 9.0 BCG Technical Manual page 205

Gasoline Model Governor Adjustments
Operate the generator set to bring the unit up to its operating temperature before attempting an adjust-
ment.
NOTE: If the governor is severely out of adjustment, manually adjust the linkage without any
load on the generator to obtain a safe output voltage before proceeding with the adjustment.
Three adjusting points are on the governor.
1. Bumper Screw: This screw is used to remove a no-load surge only. Never turn the bumper screw into
the governor far enough so that it increases the no-load speed. To adjust the governor, turn the bumper
screw in until the engine stops surging. Now bring the Increase\Decrease Screw (on the governor) up
until the generator runs between 61.5 and 62.0 cycles no-load. Apply a 1/4, 1/2, and 3/4 load to the gen-
erator and ensure the generator does not surge under these three load intervals.
NOTE: Only if the generator surges at any of these load intervals are you to follow steps #2
and #3 below.
2. Increase/Decrease Speed: This adjusting bolt sets the no-load speed of the engine. (The linkage arm be-
tween the governor arm and throttle lever should be adjusted to hold the throttle full open when the en-
gine is not running.) Make sure this linkage moves freely and that the ball joint connectors are properly
lubricated. Use graphite lubricant at this connection. Disconnect the ball joint and apply a graphite
lubricant to the inside of the joint.
3. Hunting/Regulation: If the variation in engine speed between no-load and full-load is too great, adjust this
eye bolt to draw the spring closer to the lever hub. The increase/decrease speed bolt may need to be ad-
justed as well.
If the governor surges while under a load, adjust this eye bolt to move the spring away from the lever hub.
(Check the speed adjustment.)
To increase or decrease the speed of a diesel engine-driven generator, adjust the linkage between the throt-
tle arm and the solenoid plunger with the plunger completely bottomed in the solenoid.
199
INCREASE/DECREASE SPEED SCREW
CARBURETOR THROTTLE LEVER
Westerbeke Generators