Westerbeke M4-30 Owner's Manual download pdf (Page 24)

The injector pump internal unit can

now

be loosened and removed. It may

necessary to remove

fuel lines from injector nozzles to aid

pump removal

There are several shims located just below the pump top plate which will

used to adjust the

timing. These shims are

.006

inch thick and are equal to

1-V

2° or approximately 3/16" of distance

the circumference of the flywheel. Addition of shims will retard the timing and removing shims

will advance the timing.

If the mark on the flywheel is below the pointer, the fuel is being injected sooner than required and

the fuel timing must

retarded. Shims must

added until the timing marks are aligned. The op-

posite is true if the flywheel mark is above the pointer. See figure

If at all possible, it

better

operate the engine with the timing advance rather than retarded.

Replace fuel injector pump, making sure the fuel rack pin aligns with the housing opening and is

properly inserted into the slotted arm. Tighten injector pump cover in place. Reconnect fuel line

from fuel filter

pump. Repeat steps 2 thru

on engine timing.

If timing is satisfactory, then reassemble.

certain that all plates, covers, fuel lines and connec-

tions are tight and free of leaks so that safe operation may

expected when the engine is

started. Clean engine throughly.

10.

Caution:

sure

all

fuel lines and connections are kept clean during adjusting, to prevent fouling

nozzles when reassembled.

FIGURE 5

SHIM PLACEMENT

DECOMPRESSION DEVICE ADJUSTMENT:

(on

models which have decompression)

The decompression device must

adjusted every time the rocker arm cover is removed or tightened.

Remove cover over flywheel timing mark inspection hole. (Tool

B).

No decompression lever

models

and 35.

Turn crankshaft over by hand being careful not to damage the spline

end of crankshaft,

until flywheel mark 1-TC is aligned with the pointer

the wall of the inspection hole.

Remove decompression covers from top of rocker arm cover over number 1 cylinder. (Tool

A).

With the alignment of the pointer and flywheel mark 1-TC the no. 1 cylinder decompression

adjustment

can

now

accomplished.

Pull and hold lever to full decompression position.

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Westerbeke M4-30 Owner's Manual Page 24

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