Westerbeke 20B TWO Installation Manual download pdf (Page 44)

ENGINE

TROUBLESHOOTING

The

following

troubleshooting

table

describes

ce11ain

problems

relating

to

engine

service,

the

probable

causes

of

these

prob-

lems,

and

the

recommendations

to

overcome

these

problems.

NOTE: Fuel run/shut

off

solenoid (Optional).

Problem

Probable

Cause

No

panel

indications;

fuel

solenoid

1.

Battery

switch

not

on.

or

fuel

pump

is

not

working

(key

switch

is

on

and

PREHEAT

button

is

depressed).

2.

20-amp

circuit

breaker

tripped.

3.

1

0-amp

breaker

tripped

on

preheat

solenoid

4.

Loose

battery

connections.

5.

Preheat

solenoid

not

operating.

START

button

is

depressed,

no

starter

1.

Connection

to

solenoid

faulty.

engagement.

2.

Gear

shift

not

In

neutral.

3.

Faulty

switch.

4.

Faulty

solenoid.

5.

Loose

battery

connections.

6.

Low

battery.

START

button

is

depressed;

panel

1.

Poor

connections

to

fuel

solenoid.

indications

OK;

starter

solenoid

OK;

fuel

solenoid

not

functioning.

2.

Defective

fuel

solenoid.

Engine

cranks,

but

does

not

1.

Faulty

fueling

system.

start,

fuel

solenoid

energized.

2.

Preheat

solenoid

faulty.

3.

Low

battery

power.

Engine

can't

be

stopped.

1.

Faulty

DC

alternator.

2.

Disconnect

fuel

shut-off

cable.

NOTE:

The

engine's electrical system

is

protected

by

a

20

ampere

manual

reset

circuit

breaker located

on

a

bracket

at

the

back

of

the

engine.

The

preheat solenoid

is

mounted

on

the

same

bracket.

Verification/Remedy

1.

Check

switch

and/or

battery

connections.

2.

Reset

breaker;

if

breaker

trips

again,

check

preheat

solenoid

circuit

and

check

circuit

for

shorts

to

ground.

3.

Check

the

voltage

both

at

and

after

the

breaker

on

the

preheat

solenoid.

4.

Check(+)

connection

to

starter

solenoid

and

(-)

connection

to

engine

ground

stud.

Check

battery

cable

connections.

5.

Check

solenoid

"S"

terminal

for

voltage.

1.

Check

connection.

2.

Gear

shift

must

be

in

neutral

(see

NEUTRAL

SWITCH

under

HURTH

HSW

TRANSMISSIONS).

3.

Check

switch

with

ohmmeter.

4.

Check

that

12

volts

are

present

at

the

solenoid

connection.

5.

Check

battery

connections.

6.

Check

battery

charge

state.

1.

Check

connections.

2.

Check

that

12

volts

are

present

at

the(+)

connection

on

the

fuel

run

solenoid.

1.

Check

that

fuel

valves

are

open.

1

a.

Check

for

air

In

fuel

system.

Bleed

air

from

fuel

system.

1b.

Fuel

filters

clogged.

Replace

filters

and

bleed

air

from

fuel

system.

2.

Check

solenoid.

3.

Switch

to

combine

house

and

start

batteries.

3a.

Replace

batteries.

1.

Remove

Exc.

connection

at

alternator;

repair

alternator.

2.

Check

connection

at

shut-off

lever.

Pull

lever

back

to

close

offthe

fuel

3.

Fuel

run

solenoid

will

not

de-energize.

3.

Manually shut the engine down using the shut

off

lever

adjacent to the throttle lever on the engine.

Battery

runs

down.

1.

Oil

pressure

switch.

1.

Observe

if

gauges

and

panel

lights

are

activated

when

engine

.

is

not

running.

Test

the

oil

pressure

switch,.

2.

High

resistance

leak

to

ground.

2.

Check

wiring.

Insert

sensitive

(0-

.25

amp)

meter

in

battery

lines.

(Do

not

start

engine.)

Remove

connections

and

replace

after

short

is

located.

3.

Low

resistance

leak.

3.

Check

all

wires

for

temperature

rise

to

locate

the

fault.

4.

Poor

battery

connections.

4.

Check

cable

connections

at

battery

for

loose

connections,

corrosion

5.

DC

alternator

not

cliarging

5.

Check

connections,

check

belt

tension,

test

alternator.

See

(tachometer

not

operating).

DC

ELECTRICAL

SYSTEM/ALTERNATOR.

Battery

not

charging

1.

DC

charge

circuit

faulty.

1.

Perform

DC

voltage

check

of

generator

charging

circuit.

See

Testing

the

Battery

Charging

Circuit.

2.

Alternator

drive.

2.

Check

drive

belt

tension;

alternator

should

turn

freely.

Check

for

loose

connections.

Check

output

with

voltmeter.

Ensure

12

volts

are

present

at

the

Exc.

terminal.

(continued)

Engines

& Generators

36

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