Westerbeke W-70GA Manual de instalación descargar pdf (Pagina 41)

ENGINE

TROUBLESHOOTING

Problem

Probable

Cause

Verification/Remedy

Engine

slows

and

stops.

Fuel

lift

pump

failure.

Fuel

lift

pump

should

make

distinct

ticking

sound.

Replace

pump

with

spare.

Switches

and/or

wiring

loose

Inspect

wiring

for

short

circuits

and

loose

connections.

disconnected.

Inspect

switches

for

proper

operation.

Fuel

starvation.

Check

fuel

supply,

fuel

valves,

fuel

lift

pump.

Amp

circuit

breaker

tripping.

Check

for

high

amperage

draw

during

operation.

Ensure

breaker

not

overly

sensitive

heat

which

would

cause

tripping.

Exhaust

system

restricted.

Check

for

blockage,

collapsed

hose,

carbon

buildup

exhaust

elbow.

Water

fuel.

Pump

water

from

fuel

tank(s);

change

filters

and

bleed

fuel

system.

Air

intake

obstruction.

Check

air

intake.

Engine

overheats/shuts

down.

Raw

water

not

circulating.

Raw

water

pump

failure.

Check

impeller

replace.

Coolant

not

circulating.

Obstruction

raw

water

intake

raw

water

filter.

2a.

Thermostat

remove

and

test

hot

water.

Replace

thermostat.

2b.

Loss

coolant

check

hoses,

hose

clamps,

drain

plug,

etc.

for

leaks.

2c.

Broken

loose

belts

tighten/replace.

2d.

Air

leak

system;

run

engine

and

open

the

pressure

cap

bleed

air.

Add

coolant

needed.

Exhaust

smoke

problems

Blue

smoke.

Incorrect

grade

engine

oil.

Oil

diluted.

1a.

Crankcase

overfilled

with

engine

oil

(oil

blowing

out

through

the

exhaust).

Crankcase

breather

hose

clogged.

1c.

Valves

and/or

piston

rings

are

worn.

White

smoke.

Engine

running

cold.

Black

smoke.

Improper

grade

fuel.

3a.

Fuel

burn

incomplete

due

high

back-pressure

exhaust

insufficient

air

for

proper

combustion

(check

for

restrictions

exhaust

system;

check

air

intake).

3b.

Dirty

flame

arrester.

3c.

Faulty

carburetor.

Choke

stuck.

3d.

Lack

air-check

air

intake

and

air

filter.

Check

for

proper

ventilation.

3e.

Idle

mixture

jet

too

rich.

3f.

Overload.

TROUBLESHOOTING

COOLANT

TEMPERATURE

AND

OIL

PRESSURE

GAUGES

the gauge reading

other than what is nonnally indicated

by the gauge when the instrument panel is energized, the

fIrst

step is to check for 12 volts

between the ignition (B+)

and the Negative (B-) terminals

the gauge.

Assuming that there

12 volts as required, leave the

instrument panel energized and perfonn the following steps:

Disconnect the sender wire at the gauge and see

the

gauge reads zero, which is the nonnal reading for this

situation.

Remove the wire attached to the sender terminal at the

sender and connect it to ground. See

the gauge reads

full scale, which

the nonnal reading for this situation.

both

the above gauge tests are positive, the gauge

undoubtedly

and the problem lies either with the

conductor from the sender to the gauge or with the sender.

either

the above gauge tests are negative, the gauge

probably defective and should be replaced.

Assuming the gauge

OK, check the conductor from the

sender to the sender tenninal at the gauge for continuity.

Check that the engine block

connected to the ground.

Some starters have isolated ground terminals and if the

battery is connected to the starter (both plus and minus

tenninals), the ground side will not

necessmily be connected

to the block.

Engines & Generators

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Westerbeke W-70GA Manual de instalación Pagina 41

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