Installation manual

ManualsBrandsWesterbeke ManualsAutomotive108B

ENGINE

ADJUSTMENTS

NOTE:

WESTERBEKE

recommends

that

the

following

engine

adjust-

ments

be

peiformed by a

competent

engine

mechanic.

The

information

below

is

provided

to

assist

the

mechanic.

TESTING

ENGINE

COMPRESSION

Make

certain

the

oil

level

(dipstick)

is

at

the

correct level

and

the

air

intake

filter

is

clean. The

battery

and

starter

motor

must

also

be

in

good

condition.

1.

Wann

the engine

to

normal

operating temperature.

2.

Disconnect

the

wire

to

the

fuel

shutdown

solenoid.

-

3.

Remove

all

the

glow

plugs

from

the

engine

and install

the

compression gauge/adapter

combination

to the

cylinder

on

which

the

compression

is

to

be

measured.

~FUEL

SHUTDOWN

{/!

/1

SOLENOID

4.

Close

the raw water seacock

(thru-hull).

5.

Crank

the engine

and

allow the

gauge

to

reach a

maximum

reading,

then

record that

reading.

6.

Repeat

this

process

for

each

cylinder.

NOTE:

If

the

readings

are

below

the

limit,

the

engine

needs

an

overhaul.

55'

FOUR

COMPRESSION

PRESSURE

441

PSI

(3.04

MPa)

NORMAL

AT

CRANKING

SPEED

OF

250

RPM.

44.1

PSI

BETWEEN

CYLINDERS

7. Re-install the

glow

plugs

(use

anti-seize

compound on

the

threads) and

reset

the fuel shut-off

to

the rnn

position.

S.

Open

the

raw

water seacock (thru-hull).

i

Low

Compression

When

low

compression

is

found,

determine

the

cause

by

applying

a small

amount

of oil

in

the

cylinder

thru the

glow

plug

hole.

Allow the

oil

to

settle.

Install

the

pressure

gauge

and repeat

the

above

test.

If

the

compression reading

rises

dramatically,

the

fault

is

with

the

rings.

If

the compression valve

does

not

rise,

the problem

is

with

the

valves.

A

slight

rise in compression would

indicate

a problem

with

both

the

rings and

the

valves.

MEASURING

COMPRESSION

COMPRESSiON

GAUGE

~

OIL

PRESSURE

The

engine's

oil

pressure, during operation,

is

indicated

by

the

oil pressure

gauge

on

the

instrument panel. During

normal

operation,

the

oil pressure will

range

between

40

and

85

psi.

NOTE:

A

newly

started,

cold

engine

can

have

an

oil pressure

reading

up

to

85

psi.

A

warmed

engine

can

have

an

oil

.

pressure

reading

as

low

as

25

psi.

These

readings

will

vary

depending

upon

the

temperature

of

the

engine

and

the

rpms.

Low

Oil

Pressure

The

specified

safe minimum oil pressure

is

5 - 10 psi. A

gradual

loss

of oil

pressure

usually indicates

worn

bearings.

For

additional

information

on

low

oil

pressure

readings,

see

the

ENGINE

TROUBLESHOOTING

chatt.

Testing

Oil

Pressure

To

test

oil

pressure, remove

the

oil pressure sender then

install

a mechanical

oil

pressure gauge in

its

place. After

warming

up

the

engine, set

the

engine speed

at

idle and

read

the

oil

pressure

gauge.

55'

FOUR

OIL

PRESSURE

43

TO

85

PSI

(290

TO

590

KPa)

NORMAL

.

MECHANiCAL

OIL

PRESSURE

GAUGE

. .

OIL

PRESSURE

SWITCH'

'~

.~

~.

~

WESTERBEKE

.

En~ines

&

~enerators

36