Yanmar 4JH45 Spezifikationen PDF herunterladen (Seite 88)

TROUBLESHOOTING

82 JH Series Operation Manual

Is there water, oil or fuel

leakage? Are there any

loose bolts or

connections?

Check the engine room daily for any leaks

or loose connections.

Is there sufficient fuel in the fuel tank?

Refill fuel in advance to avoid running out

of fuel. If the tank runs out of fuel, bleed

the fuel system. See Bleeding the Fuel

System on page 36.

When operating the engine at low speed

for long periods of time, race the engine

once every 2 hours. Racing the engine

with the clutch in NEUTRAL, accelerate

from the low-speed position to the

high-speed position and repeat this

process about five times. This is done to

clean out carbon from the cylinders and

the fuel injection valves.

NOTICE

Neglecting to race the engine will result in

poor smoke color and reduce engine

performance.

Periodically operate the engine near

maximum speed while underway. This will

generate higher exhaust temperatures,

which will help clean out hard carbon

deposits, maintain engine performance

and prolong the life of the engine.

TROUBLESHOOTING

INFORMATION

If the engine does not operate properly,

refer to the Troubleshooting Chart on page

83 or consult authorized Yanmar Marine

dealer or distributor.

Supply the authorized Yanmar Marine

dealer or distributor with the following

information:

• Model name and serial number of your

engine

• Boat model, hull material, size (tons)

• Use, type of boating, number of hours

run

• Total number of operation hours (refer to

hour meter), age of boat

• The operating conditions when the

problem occurs:

• Engine speed (min

-1

)

• Color of exhaust smoke

• Type of diesel fuel

• Type of engine oil

• Any abnormal noises or vibration

• Operating environment such as high

altitude or extreme ambient

temperatures, etc.

• Engine maintenance history and

previous problems

• Other factors that contribute to the

problem

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