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ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine
adjustments be peiformed by a competent engine mechanic.
The infonnation below is provided to assist the mechanic.
VALVE CLEARANCE ADJUSTMENT
NOTE:
Retorque the cylinder head bolts before adjusting the
engine's valves (see TORQUING THE CYLINDER HEAD
BOLTS).
1. Remove the rocker cover and
gaske~.
2. Position the No.1 piston at Top Dead Center (IDC) of its
compression stroke and adjust the #1 and #3 exhaust
No.1 and No.2 valves on the intake side of the cylinder
head and the No.1 and No.3 on the exhaust side. Rotate
the crankshaft 360° in a clockwise direction and adjust
the remaining four valves.
#1 INTAKE
#4 EXHAUST
3. Replace the rocker cover and the rocker cover gasket..
Rocker cover torque: 2.9-S.1Ih-ft (0.4-0.7 kg-m)
4. Adjust all values to 0.012 (0.30mm) with the engine hot.
~'.D121'."mm)
IGNITION TIMING
1.
Attach a timing light to the #1 spark plug and mark the
front crankshaft timing groove and the timing mark on the
scale embossed on the engine's front cover.
Each timing mark represents 2°.
CRANKSHAFT'
PULLEY
/
/ '
/
2. Start the engine and warm the engine to its nonnal
operating temperature.
3. Using the timing light, align the timing groove in the front
crankshaft pulley with the proper timing mark on the igni-
tion timing scale embossed on the engine's front cover.
Do tillS by loosening and slowly rotating the distributor
body. Refer to the timing specifications:
TIMING SPECIFICATIONS
0° TOC AT 625 RPM
ELECTRIC CHOKE
The electric choke uses a 12 volt heating element which
opens the choke automatically when the engine starts.
The choke is adjusted with the engine off and cooled. Adjust
the choke by loosening the three cover-securing screws and
rotating the cover clockwise to LEAN the choke and
counterclockwise to RICH the choke. The .choke is initially
set at the factory for an average of 700P (21°C) room
temperature. The choke may need readjustment at engine
commissioning for the ambient temperature of the area the
engine is operating in. The choke reference mark is located
on the underside of the choke cover.
SEE CARBURETOR
Engines
&
Generators
. 30
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Troubleshooting
