Governor - Westerbeke 9.0 BCG Technical Manual

GOVERNOR
Governor Description
The belt-driven, mechanically operated governor maintains the engine's rpm under various load conditions.
Engine speed determines the hertz and voltage output of the generator.
NOTE: Periodically adjust the governor's belt tension. The belt's tension should be between
3/8 to 1/2 inch deflection between the widest span of this belt. Since belts stretch slightly, this
stretching will, to some degree, affect the governor's action .. Maintain a 22 pound pressure
to the belt's outer face for proper governor operation. Replace this drive belt when it becomes
worn, frayed or cracked.
CAUTION
Do not over tighten the governor's drive belt. Over tightening causes premature wear of the
governor, the belt, or could bend the governor's shaft.
The governor will maintain engine speed to within 3 hertz of generator frequency output from no-load to full
rated load of the generator. (See the generator's scarlet and gold Data Plate)
Governor Adjustments
Operate the generator set to bring the unit up to its operating temperature before attempting an adjustment.
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. (Refer to the following illustrations.)
CARBURETOR THROTTLE LEUER
1. 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.
163 Westerbeke Generators