Injectidn Pump Timing Adjustment - Westerbeke 20B TWO/30B THREE Operator's Manual

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Injection Pump TIming Adjustment (Spill TIming)

InCOlTeCt fuel injection timing will result in hard engine starting and poor engine performance. Adjust the in-

jection timing as follows:

NOTE: The shut-off lever (throttle) must be in the RUN position while making the adjustment

or no fuel will flow to the fuel injection pump.

Refer to

the

cutaway

view of the

fuel Injection pump. Remove the cylinder glow plugs to allow the engine's

crankshaft to be easBy

rotated

whDe making this adjustment. Rotate the engine so as to position the No. 1

piston

approximately the beginning

its compression stroke. Remove

the

high pressure injector line from

betweer1

the

Injector pump

and the

No. 1 injector. Carefully remove the delivery valve holder from the pump

and lift

out the

delivery valve spring. Carefully reinstall

the

delivery valve holder and tighten it in

the

pump.

Reatlach

the

No. 1 high pressure injector line to the delivery valve holder

but

not

connect it to the No. 1

injector;

rather,

swing the line out away from the engine so that during the timing check fuel will flow from

this line

and

into a

bucket and

not on the engine.

Slowly work

the

priming lever on the

fuel

lift pump. Working this lever will prime

the

injector pump and fuel

will flaw

from

the

No. 1 injector line. Continue priming slowly and rotate

the

engine's crankshaft in its nor-

mal

direction of

rotation

(moving

the

No. 1 piston up on its compression stroke). Observe

the

fuel flow from

the No. 1 injector line as the crankshaft is slowly turned. The instant the fuel flow stops marks the beginning

offuel

injection.

Check that

the 19" BTDC timing mark on the crankshaft pulley is in alignment

with

the timing

pointer on

the

front cover.

The injection timing should be within

0.5°.

DELIVERY VRLVE HOLDER

DELIVERY

VALVE

SPRING

B R R R EL

-=:::"":l:7Ttl

CONTROL

PINION

PLUNGER SPRING

:ni>-":"-'-"7.:~-

CO" T R 0 L R A C I

Cutaway View of the 30B THREE's Fuel Injection Pump

"WIV'

WESTERBEKE

Engines & Generators

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20b two 30b three

Injectidn Pump Timing Adjustment - Westerbeke 20B TWO/30B THREE Operator's Manual

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