Westerbeke W-70GA Manual de instalación descargar pdf (Pagina 39)

ENGINE

TROUBLESHOOTING

Problem

Probable

Cause

Verification/Remedy

Engine

starts,

runs

and

then

shuts

down.

1.

Dirty

fueVwater

separator

filter.

1.

Change

filters.

2.

Faulty

fuel

lift

pump.

2.

Pump

should

be

"ticking".

Check

connections,test

for

12

volts.

Engine

starts,

runs

but

does

not

throttle

up.

1.

Fuel

line

restriction.

1.

Inspect

all

fuel

lines.

2.

Throttle

plate

binding.

2.

Adjust

linkage.

3.

Faulty

fuel

lift

pump.

3.

Lift

pump

should

"tick".

Check

connections,

test

for

12

volts.

4.

Air

intake

restriction.

4.

Check

air

intake.

Clean/replace

filter

screen.

5.

High

exhaust

back

pressure.

5.

I

nspect

exhaust

elbow

for

corrosion.

Check

exhaust

elbow

hose.

Test

back

pressure.

Engine

hunts

1.

Low

battery

voltage.

1.

Check

batteries.

2.

Cracked

distributor

cap.

2.

Replace

distributor

cap.

3.

Faulty

high

tension

wires.

3.

Test

wires.

4.

Faulty

fuel

lift

pump.

4.

Lift

pump

should

"tick".

Check

connections,

test

for

12

volts.

5.

High

exhaust

back

pressure.

5.

Inspect

exhaust

elbow

for

corrosion.

Check

exhaust

elbow

hose.

Test

back

pressure.

6.

Valves

are

out

of

adjustment.

6.

Adjust

valves.

7.

Dirty

fuel

filters.

7.

Change

filters.

Battery

runs

down.

1.

Oil

pressure

switch.

1.

Observe

if

gauges

and

panel

lights

are

activated

when

engine

i

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

altemator

not

charging

5.

Check

connections,

check

belt

tension,

test

alternator.

See

(tachometer

not

operating).

ALTERNATOR

TESTING.

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.

Engine

misfires.

1.

Poor

quality

fuel.

1.

Check

filters

for

water.

Change

fuel.

1a.

Fuel

blockage.

1a.

Replace

inlet

fuel

filter,

check

fuel

lines.

2.

Incorrect

timing.

2.

Adjust

timing.

3.

Dirty

flame

arrester.

3.

Clean

with

compressed

air

or

kerosene.

4.

Cracked

distributor

cap.

4.

Replace

distributor.

5.

Faulty

ignition

wires.

5.

Test,

replace.

6.

Spark

plugs

are

worn.

6.

Replace

spark

plugs.

7.

High

exhaust

back-pressure.

7.

Test

back

pressure.

8.

Valve

clearances

are

incorrect.

8.

Check

clearances.

Engines & Generators

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