Yanmar 4JH4-HTE - Service Manual

Other manuals for Yanmar 4JH4-HTE

Questions and Answers

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Heather SmithAug 18, 2025
Why Yanmar 4JH4-HTE starter turns but engine does not start?
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  Kimberly McdonaldAug 18, 2025
  If your Yanmar Engine's starter turns but the engine doesn't start, it might be due to several reasons. You may have no fuel, so add fuel and bleed the fuel system. The fuel filter might be clogged, so replace the filter element. It could also be due to improper fuel, so replace it with the recommended fuel. For issues with fuel injection or compression leakage, consult your authorized Yanmar Marine dealer or distributor.
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Steven GonzalezAug 20, 2025
Why Yanmar 4JH4-HTE Engine producing black smoke?
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  Sean CoffeyAug 20, 2025
  If the exhaust from your Yanmar Engine is producing black smoke, it may be due to a few reasons. It could be that the load has increased, or there's an improper propeller matching. The intake silencer (air cleaner) might be dirty, so clean the element. Using improper fuel can also cause black smoke, so replace it with the recommended fuel. For a faulty spraying of the fuel injector, consult your authorized Yanmar Marine dealer or distributor.
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Kevin CoxAug 23, 2025
What to do if Yanmar Engine starter turns but the engine does not start?
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  Julie CraigAug 23, 2025
  If the starter turns but the Yanmar Engine doesn't start, it could be due to several reasons. You might be out of fuel, so add fuel and bleed the fuel system. Another possibility is a clogged fuel filter, in which case you should replace the filter element. Using improper fuel can also cause this issue, so replace it with the recommended fuel.
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Benjamin MurphyAug 26, 2025
Why Yanmar 4JH4-HTE Engine battery low charge indicator does not go out during operation?
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  Stephen VegaAug 26, 2025
  If the battery low charge indicator remains on during Yanmar Engine operation, it could be due to a loose or broken V-belt, which requires replacement or tension adjustment. Alternatively, the battery itself might be defective, so check the fluid level, specific gravity, and consider replacing it.
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james25Aug 28, 2025
What to do to ensure sufficient fuel in Yanmar Engine?
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  Patricia GoodwinAug 28, 2025
  To prevent running out of fuel for your Yanmar Engine, refill the fuel tank in advance. If the tank runs out of fuel, bleed the fuel system.
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campbellnicholasAug 30, 2025
What to do if Yanmar 4JH4-HTE Engine starter does not turn or turns slowly?
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  Walter PhillipsAug 31, 2025
  If the Yanmar Engine starter doesn't turn or turns slowly but the engine can be turned manually, ensure the clutch is in NEUTRAL before starting. Check the battery fluid level and recharge or replace the battery if necessary. Also, remove any corrosion from the cable terminals and tighten the battery cables.
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Laura NguyenSep 2, 2025
What to do if Yanmar 4JH4-HTE Engine has abnormal vibrations or noise?
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  Tommy WeberSep 2, 2025
  Engine and hull resonance may suddenly increase at certain engine speed ranges, causing heavy vibrations in Yanmar Engine. Avoid operation in this speed range. If any abnormal sounds are heard, stop the engine and inspect for cause.
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Rachel Gonzales DDSSep 4, 2025
What to do if alarm sounds during Yanmar 4JH4-HTE operation?
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  Jesus MckaySep 4, 2025
  If the alarm sounds during Yanmar Engine operation, immediately lower the engine speed, check the warning lamps and stop the engine for repairs.
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michaelrichardsonSep 7, 2025
What to do if not enough water is discharged from Yanmar 4JH4-HTE?
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  murrayteresaSep 7, 2025
  If the water discharge from the Yanmar Engine's seawater outlet pipe is low, stop the engine immediately. Identify the cause and repair.
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Daniel AnthonySep 9, 2025
What to do if the engine oil low pressure alarm indicator comes on in my Yanmar 4JH4-HTE Engine?
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  jonathan47Sep 9, 2025
  If the engine oil low pressure alarm indicator comes on, it could be due to a low engine oil level. In this case, check the engine oil level and add or replace as needed. Alternatively, the engine oil filter might be clogged. Try replacing the engine oil filter and the engine oil.

Yanmar 4JH4-HTE Specifications

General

Engine Model	4JH4-HTE
Number of Cylinders	4
Aspiration	Turbocharged
Fuel System	Direct injection
Lubrication System	Forced lubrication by trochoid pump
Bore x Stroke	84 mm x 90 mm
Rated Output	55.2 kW (75 PS) at 3, 300 rpm
Cooling System	Freshwater cooled
Starting System	Electric
Alternator	12V
Engine Type	4-stroke, water-cooled diesel