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Old 19-05-2013, 08:13   #31
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Re: Yanmar 4JH4-TE owners

Originally Posted by scoobert View Post
how much did you spend on the engines and transmission?
Canadian price list.

Nanaimo Marine Centre Store equipment parts and accessories

We don't need no stinking badges.
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Old 20-05-2013, 01:42   #32
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Re: Yanmar 4JH4-TE owners

Originally Posted by DennisDW View Post
'Time to retire the perkins 4-154.


Thanks all,
Hi Dennis,
I rebuild Perkins engines and need a 4.154 for parts as I am rebuilding two of them. Is your old engine for sale? If so, I will come and pick it up with cash in hand.

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Old 28-12-2013, 11:47   #33
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Re: Yanmar 4JH4-TE owners Defective turbocharger

3 yrs ago I bought this engine with turbocharger.
The installer kept the 2 1/2" exhaust pipe of the old Perkins.
Now the turbo charger stopped spinning and exhaust is black, probably has gummed up the turbo charger.
Besides changing the exhaust fitting, hose, (riser loop? Water lock?), what is involved in cleaning or repairing the turbo charger?
Replace it?

Any advice?

Thank you
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Old 30-12-2013, 23:57   #34
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Re: Yanmar 4JH4-TE owners

The manual says to clean the turbo once a week with Yanmar turbo cleaner. Seriously. Once a week.

You might be able to get it to free up with cleaner, but I doubt it. It takes about 2 hours to pull the turbo. Good tools and tiny fingers help. It's a puzzle. About the same to put it back together. We cleaned ours with EZ Off Oven Cleaner. Not the "green" stuff, the really nasty stuff. DO remember not to spin the turbo with water or air, as there is no oil for lubrication. Probably just needs a good cleaning.

In the future, run the pi$$ out of it regularly. I'm bad about doing that.
Bill Streep
San Antonio/Port Aransas, TX
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Old 12-11-2015, 04:51   #35
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Re: Yanmar turbo chargers

How do you clean a turbocharger and keep it from corrosion?
I have the Yanmar Diesel 4JH4S-TFE in a 43 ft sailing ketch.

After a year it was stuck in sud. Black smoke, RPM max 1900, less power.
reason: Exhaust too small. I had it increased to 3 " id, and the Turbocharger cleaned.
(Also the original exhaust elbow was made of aluminum and developed several cracks, I had a SS part made, so some water may have gone the wrong way in the exhaust elbow).

A year later it was totally corroded inside. My guess is that the island mechanic used the old gaskets and water leaked into it.

I also did not know about having to run it on high speed. I ran it between 1500 for motor sailing and 2100 RPM.
Another theory by one mechanic was that the amount of saltwater left in the rather long exhaust hoses and pipes (6ft up from engine and down, then 6 ft to exhaust elbow, seawater hose up 6 ft and 3 ft to exhaust)would get into the turbo charger. I doubt that.
I ran it high, enjoying the good speed, 7.2 knots at 2800 to 2900 RPM until I ran out of 120 gallons of fuel in 23 hours. 5.5 gall p. hour compared to my previous 3/4 gall/hour. Then running at 2100 to 2300 RPM and 6.5 kn in calm water I used 1.5 to 1.7 gall p hour.
My previous Perkins 63 HP, no turbocharger gave me 7.2 kn at 1 gall p.h.
So the turbocharger on the Yanmar is a bad choice for a sailboat (displacement 19 t Endeavour 43 ketch, 18" Maxprop).
But now that I have it, how do I maintain it?
It is made out of rusting iron and already shows rust after 2 weeks. But saltwater had sprayed over it from the seawater little nipple on top of the riser of the seawater hose. I attached a hose to that to lead the spill into the bilge. But I assume the same corrosion happens inside.
Thanks for your advice
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Old 12-11-2015, 05:32   #36
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Re: Yanmar 4JH4-TE owners

Dear wolfgang,

Something is wrong. Perhaps you should look at the installation again?

I can not really follow your description of installation.

I use a raiser (elbow) made of bronz. (Yanmar delivered)
(I only have 30 cm between elbow down to the muffler/waterlock.)

I have no corrosion on the Turbo after 7 years and 1300 hours.

I have done one turbo wash (that was not needed!) Easy job that you can do yourself.

I normally cruise at 2300-2400 RPM, 7 knots/4,4 l/h

18 " propeller sounds small to me! I use a 22"14, 3 blade Flex-O-Fold

Sent from my iPad using Cruisers Sailing Forum
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Old 09-02-2016, 22:21   #37
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Re: Yanmar 4JH4-TE owners


I have 44ft 12tons full keel that came with 1986 Yanmar 4JH-HTE 66hp that is turbo with intercooler. Since the turbo was not working and I wanted a better access to raw water pump, I removed the turbo and intercooler.

The boat can do 7.5 kn/hr on 3.3 liters/hr (0.9 gal/hr) on 2,500 rpm. I am not complaining.

Another boater with volvo engine with turbo was able to do 1.5 liter/hr !!!
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Old 09-02-2016, 23:29   #38
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Re: Yanmar 4JH4-TE owners

If you use your sailboat as a motorboat, a turbo will work fine. However, if you have a sailing boat, and only use the motor to charge the batteries or when the weather is calm, you will have turbo problems. You will not get the turbo speed and temperature high enough to keep it clean.

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