Valve Clearance - Westerbeke 3.5KW SBCG-60Hz Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine
adjustments be peifonned by a competent engine mechanic. The
infonnation below is provided to assist the mechanic.
VALVES
VALVE CLEARANCE
It is routine maintenance to adjust the valve clearance after
the first fifty hours of operation. Valve clearance adjustment
must be performed when the engine is cool and the piston
must be the top dead center of the compression stroke.
Perform the following adjustment steps:
1. Remove the fuel pump and filter assembly from the
cylinder head cover. Unbolt the coil and move it out of
the way. This should give good access
to
the valves
behind the covet.
2. Remove the cylinder head cover.
3. Remove the flywheel 'cover to access the flywheel and
driven pulley.
4. Tum the driven gear and align the "I and 0" mark on the
driven pulley with the
"v'"
mark on the cylinder head.
~hO:02
FLYWHEEL
~ ~
VMAAK -
5. Adjust the intake and exhaust valve clearance for
cylinder #1.
a. Loosen the lock nut.
b. Insert a feeler gauge between the valve end and the
adjusting screw.
c. Set the valve clearance by the adjusting screw.
VALVE CLEARANCE:
INTAKE: 0.13 - o.17mm (0.005 - 0.007in)
E EXHAUST: 0.18 - 0.22mm (0.007 - 0.009in)
d; Tighten the lock nut.
e. Again, check the valve clearance.
6. Tum the driven gear and align the "2 and 0" mark on the
driven pulley with the" V" mark on the cylinder pead.
EXHAUST
SIDE
CYL. '1 ~f;6'-j~:::J#=:::::::1
ADJUSTING SCREW
FEELER GAUGE
INTAKE
SIDE
7. Adjust the intake and exhaust valve clearance for cylinder
#2 using the same sequence.
NOTE:
When loosening and tightening the lock nut, hold
the adjusting screw with a valve clearance driver to pre
vent it from moving.
VALVE
CLEARANCE
DRIVER
TIGHTEN TORQUE
PER LOCKNUT
4.4-5.8 FT-LB (0.6-0.8 KG-M)
8. Install the cylinder head cover. Apply sealant to the inside
rim of the cover as indicated by the shaded area of the
drawing.
BOLT TORQUE:
8 -10 Nm (0.8 -1.0 kg-m) 5.8 -7.2Ib.-ft
9. Install the flywheel cover and re-attach any wires removed.
SEAL THIS AREA
WITH LOCTITE
BLACK SILICONE
Engines & Generators
23