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Old 25-10-2018, 20:14   #1
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yanmar 4jh4e injector pump removal

A few months back I had to remove the injector pump from a yanmar 4jh4e. I was not happy when I looked at what was required, a lot of work to remove the the front timing cover.

Upon closer inspection and some thought it became obvious that all that work was not needed. The manufacture of a Puller to hold the injector drive gear in place while removing the injector pump was all that was required.

The puller bolts into the 4 holes that the cover plate bolts use, two bolts into the gear itself and one big fellow in the center to pop the shaft. Be sure to rotate the gear so that the key is on top before you begin. Easy as that.

A couple of hours later the puller made, put in place, an hour after that and the pump was on it's way for a full service. A week later.....and a nice wad of cash gone.....the pump was back in place and the motor purring like a kitten
.
This may be common knowledge, I am not sure. I just thought I would let folks know it's easy done if they need to do it.

Later, Ralph

PS; I do still have the puller, and no use for it, so I suppose I would part with it.
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Old 25-10-2018, 20:25   #2
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Re: yanmar 4jh4e injector pump removal

Good to know..... I have same engine on my Beneteau 423...... second year with the boat and love the engine. Has 550 hours on it Do have a question...... little off your topic but what is your typical cruising speed?

Thanks
Greg
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Old 25-10-2018, 20:57   #3
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Re: yanmar 4jh4e injector pump removal

Yup, great motor. It's in a 42 Tayana, she moves along happily 6 to 7 knots.
A lot depends on prop and how hard you like to run your engine. I don't like running her hard.
Anyone in a hurry in a sailboat is in the wrong boat.
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Old 26-10-2018, 01:26   #4
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Re: yanmar 4jh4e injector pump removal

Agree...... I run typically at 2200 and she does just fine.... I have a 3 blade fixed prop.
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Old 26-10-2018, 08:33   #5
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Re: yanmar 4jh4e injector pump removal

Hi,

Just out of curiosity, how many hours did you have on the engine when you had to replace the pump?

I usually motor around 2500 on my Jeanneau 45 at around 8 knots.

Bill
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Old 26-10-2018, 08:36   #6
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Re: yanmar 4jh4e injector pump removal

Allied39,

I have a 4JH4E and would be interested in your puller.

Art Watson
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Old 26-10-2018, 09:34   #7
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Re: yanmar 4jh4e injector pump removal

Hi there
Any picture of the puller? It will be interesting.
Thanks for sharing!!
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Old 26-10-2018, 10:22   #8
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Re: yanmar 4jh4e injector pump removal

Hi, I have a 4JH4E with about 2200hrs and will service the injectors this year. I was wondering how many hrs you had on yours when you serviced the injector pump.
Thanks
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Old 26-10-2018, 11:17   #9
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Re: yanmar 4jh4e injector pump removal

The engine is basically new, 850 hrs. Long story short it was a contamination issue.
I will get some pics up and dimensions as well in the next day or so.

Hey Art, would you be willing to make a contribution to keep the " Guiness in the fridge fund" ?

Oh, can someone tell me how to PM? It's not obvious to me (like a great many things.
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Old 26-10-2018, 13:57   #10
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Re: yanmar 4jh4e injector pump removal

Sounds more like $50 deposit & $30 refunded when returned?
There is a mob on Australia that do that with harmonic removers for just about every vehicle known to man.
I reckon it's a good arrangement?
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Old 26-10-2018, 20:59   #11
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Re: yanmar 4jh4e injector pump removal

Images of puller. Will draw pic and show dimensions at some point soon
Attached Thumbnails
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Old 28-06-2019, 11:13   #12
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Re: yanmar 4jh4e injector pump removal

Allied 39 no longer participates with this forum. if you need you can PM but give alternative contact info or you will not likely get a reply.
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Old 28-06-2019, 11:24   #13
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Re: yanmar 4jh4e injector pump removal

I did that recently, just jammed several clean rags into the space between the gear and the gear cover all around from about 12'oclock to 5. The index marks lined up first obviously. The pump came out and the gear stayed in mesh.
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Old 29-06-2019, 06:15   #14
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Re: yanmar 4jh4e injector pump removal

Yanmar JH4 Series Service Manual
http://www.newmorning.info/page65/fi...e%20manual.pdf
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Old 09-10-2019, 16:49   #15
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Re: yanmar 4jh4e injector pump removal

If you would like to get a hold of the puller I made check this thread, it may be available from the last guy who needed it.

Removing Yanmar Fuel Injection Pump - Page 2 - Cruisers & Sailing Forums

it was a thread titled "removing yanmar injector pump" posted by steve77
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