Specifications
ENGINE
ADJUSTMENTS
NOTE:
WESTERBEKE
recommends
that the following engine
adjustments
be
performed by a competent engine 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 gasket.
2. Position the No.1 piston at Top dead Center (TDC)
of
its
compression stroke and adjust the #1 and #3 exhaust
calves. While facing the front
of
the engine, rotate the
crankshaft
360
0
clockwise and adjust the remaining
valves.
#1
EXHAUST
#2
INTAKE
#3
EXHAUST
3.
Replace the rocker cover and the rocker cover gasket.
ROCKER
COVER
TORQUE:
2.9
- 5:1Ib-fl
(0.4
-
0.7
ko-m)
4. Adjust all valves to 0.012 (0.30mm) with the engine hot.
(O.3Umm)
IGNITION
TIMING
1. Attach a digital 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.
timing mark
rl4!J~m!li
TIMING
GROOVE
CRANKSHAFT
PUllEY
/
2. Start the engine and warm the engine to its normal
operating temperature.
3.
Using the digital timing light, check the ignition timing
first with the vacuum hose disconnected from the
distribu-
tor and then with
it
connected. Compare timing with the
specifications below. Adjust the timing as needed.
Timing
Specifications:
16"
BlOC
at
1800
rpm
±
1·
(vacuum
advance
hose
disconnected)
33
0
BlOC
al1800
rpm
± 1
0
(vacuum
advance
hose
connected)
TORQUING
THE
CYLINDER
HEAD
BOLTS
After the initial break-in period (approximately 50 hours), the
cylinder head bolts should
be
re-torqued.
Tighten the cylinder head bolts according to the sequence
shown. Make sure the engine is cold when this is done, and
loosen one head bolt one-half
turn and then tighten it
between 43 - 511b-ft
(60 -
70
Nm). Then proceed to the next
head bolt in the sequence. Tighten the RS (rocker cover stud)
securely.
Engines & Generators
24
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