Westerbeke 65B-FOUR Manual de instalación descargar pdf (Pagina 35)

ENGINE

TROUBLESHOOTING

Problem

Probable

Cause

Verification/Remedy

Engine

slows

and

stops.

1.

Fuel

lift

pump

failure.

1.

Fuel

lift

pump

should

make

a

distinct

ticking

sound.

Replace

pump

with

spare.

2.

Switches

and/or

wiring

loose

2.

Inspect

wiring

for

short

circuits

and

loose

connections.

or

disconnected.

Inspect

switches

for

proper

operation.

3.

Fuel

starvation.

3.

Check

fuel

supply,

fuel

valves,

fuel

lift

pump.

4.

20

Amp

circuit

breaker

tripping.

4.

Check

for

high

DC

amperage

draw

during

operation.

Ensure

breaker

is

not

overly

sensitive

to

heat

which

would

cause

tripping.

5.

Exhaust

system

is

restricted.

5.

Check

for

blockage,

collapsed

hose,

carbon

buildup

at

exhaust

elbow.

6.

Water

in

fuel.

6.

Pump

water

from

fuel

tank(s);

change

filters

and

.

bleed

fuel

system

.

7.

Air

intake

obstruction.

7.

Check

air

intake

Engine

overheats/shuts

down.

1.

Raw

water

not

circulating.

1.

Raw

water

pump

failure.

Check

impeller-

replace.

2.

Coolant

not

circulating.

2.

Obstruction

at

raw

water

intake

or

raw

water

filter.

2a.

Thermostat-

remove

and

test

in

hot

water.

Replace

thermostat.

2b.

Loss

of

coolant-

check

hoses,

hose

clamps,

drain

plug,

etc.

for

leaks.

2c.

Broken

or

loose

belts-

tighten/replace.

2d.

Air

leak

in

system;

run

engine

and

open

the

pressure

cap

to

bleed

air.

Add

coolant

as

needed.

Engine

alarm

sound

pulsates.

1.

Loss

of

all.

1.

Check

dipstick,

look

for

oil

leaks

at

oil

filter

and

at

oil

drain

hose

connection.

2.

OH

pressure

switch.

2.

Replace

oil

pressure

switch.

Engine

alarm

sounds

continuously.

1.

Engine

coolant.

1.

Check

engine

coolant

level.

2.

High

temperature

switch

opens

at

.

2.

Check

for

satisfactory

operation

with

switch

bypassed,

too

low

a

temperature.

check

with

ohmmeter,

replace

if

faulty.

Exhaust

smoke

problems

1.

Blue

smoke.

1.

Incorrect

grade

of

engine

oil.

1a.

Crankcase

is

overfilled

with

engine

oil

(oil

is

blowing

out

through

the

exhaust).

2.

White

smoke.

2.

Engine

is

running

cold.

2a.

Faulty

injector

or

incorrect

injector

timing.

3.

Black

smoke.

3.

Improper

grade

of

fuel.

3a.

Fuel

bum

incomplete

due

to

high

back-pressure

in

exhaust

or

insufficient

air

for

proper

combustion

(check

for

restrictions

in

exhaust

system;

check

air

intake).

3b.

Improperly

timed

injectors

or

valves,

or

poor

compression.

3c.

Lack

of

air-

check

air

intake

Check

for

proper

ventilation.

3d.

Overload.

TROUBLESHOOTING

WATER

TEMPERATURE

AND

OIL

PRESSURE

GAUGES

If

the

gauge

reading

is

other than what is normally indicated

by

the

gauge

when

the

instrument panel

is

energized, the

first

step

is

to

check for

12

volts DC between the ignition (B+)

and

the

Negative

(B-) terminals of the gauge.

Assuming

that

tl1ere

is

12

volts

as

required, leave the

instrument

panel

energized and perform the following

steps:

1._

Disconnect

the

sender wire at the gauge

and

see

if

tlle

gauge

reads

zero,

which is tlle normal reading

for

tllis

situation.

2.

Remove

the

wire

attached to the sender terminal at

tl1e

gauge

and

connect

it

to

ground. See if the gauge reads

full

scale,

which

is

the

normal reading for

tllis

situation.

If

botl1

of

the above gauge tests are positive,

the

gauge

is

undoubtedly

OK

and

tlle

problem lies either

with

the

conductor from the sender to the gauge or

with

tl1e

sender.

If

either of the above gauge tests are negative,

tl1e

gauge

is

probably defective and should be replaced.

Assuming

tlle gauge is

OK,

check

tl1e

conductor

from

the

sender to the sender terminal at the gauge

for

continuity.

Check

tha,t

the engine block

is

connected

to

ilie

ground.

Some

starters have isolated ground tenninals

and

if

the

battery

is

cotmected to the starter

(both

plus

and

minus

terminals), the ground side

will

not necessarily

be

connected

to

tlle

block.

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