Valve Clearance Adjustment; Injection Timing - Westerbeke 12C- TWO Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine
adjustments .be petformed by a competent engine mechanic.
The
information below is provided to assist the mechanic.
VALVE CLEARANCE ADJUSTMENT (CDNT.)
5. When setting IDe for the No.2 cylinder proceed as
follows:
a. For the two engine (2 cylinder) from IDC for
the No.1 cylinder, rotate the crankshaft 180
0
clockwise
(as viewed from the front of the engine) and adjust the
valve clearances for both the intake and exhaust valves
for the No.2 cylinder.
Rotate the crankshaft another 240 clockwise to,
position theNo,2 cylinder at IDC. Adjust the valve
clearances for both the intake and exhaust valves for
the No.2 cylinder.
Injection Pump Timing Adjustment (Spill Timing)
The shut·off lever (throttle) must be in the run position and
the throttle fully open while making these adjustments or no
fuel will flow to the injection pump. .
Remove the cylinder glow plugs to allow the engines
crankshaft to be easily rotated.
1. Remove the high pressure fuel line from between the
No.1 injector and the No.1 fuel delivery valve holder.
2. Remove the No.1 fuel delivery valve holder over the
"0" ring and remove the delivery valve spring beneath
the holder.
3. Reinstall only the delivery valve holder and re·attach the
high pressure fuel line
to
the delivery holder. Attach it so
that the end that would connect to the fuel injector is .
pointing away from the engine. Fuel will flow from this
line during the timing check.
IT MARK
ON PULLEY
Rotate the engine's crankshaft in its normal direction of
rotation to position piston No.1 at the beginning of its
compression stroke. , .
Move the throttle lever to its full open position and operate
the electric lift pump. Slowly rotate the crankshaft clockwise
(as viewed from the front), catching the friel from the No.1
fuel line, until the instant the fuel completely stops flowing ,
(no drips). At this instant, the 19 0 BIDCtiming mark on the
crankshaft pulley should be directly aligned with the timing
indicator on the front of the gear case ±
.5
degrees.
If the specified injection timing (19 0 BIDC) can not be
attained, adjust the timing by increasing or decreasing the
thickness of shim material under the injection pump's
mounting flange to change the injection timing point.
Changing the shim thickness by 0;004in (O.01mm) changes
the injection timing by approxilllately one degree. To
advance the timing, decrease
tile
shitt! thickness, as required.
To retard the timing, increase the shim thickness, as required.
HIGH PRESSURE
FUEL LINE
'!\,-+---t'"'"'
FUEL
... CONTROL
RACK
FUEL INJECTION PUMP
"'iIV'
WESTERBEKE
Engines 1I<:4eneratprs
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