Engine Adjustments; Adjusting Idle Speed - Westerbeke 12C- TWO Operator's Manual

ENGINE ADJUSTMENTS
NOTE: WESTERBEKE recommends that the following
engine adjustments be peiformed by a competent engine
mechanic. The information below is provided to assist the
ENGINE IDLING SPEED
The engine idling speed is pre-set at the factory but once the
boat is operating in the water other variables such as pro-
peller size, shaft length, and the transmission can affect
the
idle speed.
The normal idle speed for these engine models is 1000-1200
rpm at normal engine operating temperatures. Where ever in
this rpm range the engine operates the smoothest, does not
stall when the throttle is restarted and no damper chatler is
produces. .
STOP CONTROL
ADJUSTING THE IDLE SPEED
1. Loosen the locknut on the idle adjustment bolt on the
fuel injection pump.
2. Adjust the bolt so that the throttle control lever will hold
the engine at a quiet idle. (1000-12000 rpm) .
3. Tighten the locknut.
4. Race the engine several times to ensure the idle speed
remains as set.
OPTIONAL FUEL RUN/SHUT-OFF SOLENOID
The fuetrun solenoid is mounted in a threaded hole on the
engine'S block just aft of and below the engine's injection
pump. Proceed as follows when installing a replacement or
new fuel run solenoid.
1. Visual access to the fuel injection pump's fuel rack is needed.
To obtain this, remove the shut off lever and gasket just
below the fuel injection pump.
2. Threed the locknut onto
the
solenoid and then apply a small
amount of Teflon sealant to the threads on the solenoid.
3. Thread the solenoid into the hole on the engine and
observe the solenoid plunger through the cover opening.
Allow the plunger to contact the fuel rack and move fully
into the injection pump. Do not thread further so as to
push the plunger into the solenoid.
4. Back the solenoid out
1/4 -
112 of a tum and secure it in
position with the locknut
LOCKNUT TORIlUE VALUE 28.9-36.2 Ff-LO (4.0-5.0 M-KG)
I
ENGINE STOP ADJUSTMENT
POSITION CABLE SO THAT THE
STOP CONTROL WILL SHUT THE
ENGINE DOWN. '
IOLE
4n.lIlOTM<I'T
BOLT
THE HIGH SPEED
ADJUSTMENT IS FACTORY
SET.
5. Properly connect the three electrical leads from the
solenoid.1\vo of the connections plug into the engine
harness and the third grounds to the engine block at an
adjacent inboard threaded hole with an 8mm bolt.
FUEL RUN SOLENOID
6. Re-assemble the shut-off lever with gasket and test run the
unit.
Make certain the unit stops when the solenoid is de-
energized. If it does not and only goes to idle.
Threed
the
solenoid in 1/8 - 1/4 tum till shut-off is obtained.
'"IIY'
WESTERBEKE
Engines
& Generators
38