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Old 06-04-2019, 19:59   #1
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Yanmar 4JH4-TE engine mounts

After 2000 engine hours Im considering changing engine mounts.

Not that there is anything wrong with the existing ones.

All 4 engine mounts are the same 200 (original Yanmar)
One mechanic said that was wrong. Should be different mounts on SB and Port

Any thoughts?
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Old 11-01-2021, 09:47   #2
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Re: Yanmar 4JH4-TE engine mounts

I have over 2400 hours on my engine and the rear mounts are starting to separate. Im now in the process of changing them out. Wasnt a problem 4 weeks ago but this last trip the engine was shaking and prop shaft was moving all over. These were installed in 2009 so after 12 years I guess I cant complain.
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Old 12-01-2021, 10:01   #3
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Re: Yanmar 4JH4-TE engine mounts

OceanSailer, that's the first I've ever heard of that. The loads are different, because the mounts have to absorb torque as well as thrust, but every engine mount I've seen will do both push and pull. Are they getting squishy? Engine shifting with load on the prop?

Big family, I'm concerned that there may be a major inbalance in your system. If the mounts are worn out, I'd expect a big clunk when load goes on the propeller and another clunk when the propeller loads the engine, but between those two events the engine should be leaning on one side and pulling on the other.

OK. Two metal parts, one the mount to the frame and the other the bolt to the engine. Contained in a rubber molding capable of keeping everything in place while absorbing torque in both directions and vibrations. Your alignment does not go to hell just because you added RPMs. Your engine does not shift noticeably or go clunk because you went from forward to reverse. No run-out in the prop shaft.
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Old 12-01-2021, 10:46   #4
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Re: Yanmar 4JH4-TE engine mounts

The parts manual for the 4JH4-TE shows 4x "engine mount 200".



Your mechanic might be confused by some other engines, my 4JH2-TE does show 200 to port and 150 to starboard in the operations/installation manual.
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Old 12-01-2021, 14:02   #5
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Re: Yanmar 4JH4-TE engine mounts

Following. I have the same engine with about 2,500 hours. No noticeable issues yet.

I found this online

Quote:
Description
YANMAR Engine mount '200'
Yanmar part number: 129670-08351
Genuine Yanmar Parts & Accessories
This listing is for one Engine mount for:
4JH Please note that these are number '200'
This refers to the hardness of the rubber.
Various models have different mounts front/rear/port/starboard.
(the number is moulded into the rubber)
200 mount fits:
4JH3-TE (all round)
4JH4-HTE (all round)
4JH5E (Port side only)
Please inquire if you aren't cert
https://www.bottomlinemarine.com/pro...351_8529.shtml

212 EACH ?!!!

And if you dont like that answer here is a different one with an explanation.

Quote:
How To Select (details required):
1.Define the total weight of the engine and the transmission.
2.Determine 60% of the total weight and then divide by 2 to determine the capacity of each of the rear mounts (the mounts on the tranmission side of the engine).
3.Determine 40% of the total weight and then divide by 2 to determine the capacity of each of the front mounts (the mounts opposite the tranmission side of the engine).
4.Determine the stud necessary stud diameter and footprint of the mount.
5.Choose mount most appropriately sized for the per mount weight. When possible, choose the mount nearest the middle of the weight range.

Example:
Engine weight is 480lbs., transmission weight is 110lbs., footprint is 4″, stud diameter is 5/8″.
Total weight is 590lbs.
590 x .6 / 2 = 177 lbs per rear mount. Mounts required are 800-010
590 x .4 / 2 = 118 lbs per rear mount. Mounts required are 800-037
$177 each.


https://www.atlanticmarinedepot.com/...utm_term=20081

http://www.randdmarine.com/enginem.asp


So there you have it, 3 different answers.’
1: all the same
2: port and starboard different
3: front and back different

Welcome to Yanmar.
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Old 12-01-2021, 14:20   #6
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Re: Yanmar 4JH4-TE engine mounts

I was quoted around 300 for 1 engine mount for my 3JH4E Yanmar 2 years ago.
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Old 12-01-2021, 14:33   #7
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Re: Yanmar 4JH4-TE engine mounts

I dont know about yr model Yammer or where in the world you are but there are custom motor mount manufacturerers around if you want to save getting into the Yanmar mafia clutches.
They just need to know dimensions, weight of engine & Hp usually
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Old 12-01-2021, 14:44   #8
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Re: Yanmar 4JH4-TE engine mounts

I found a copy of an R&D that explains in more detail how to select the correct engine mount. Might be useful.

https://www.yumpu.com/en/document/re...logpdf-pyi-inc

I am still not clear on how to classify “shear.”
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Old 12-01-2021, 15:28   #9
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Re: Yanmar 4JH4-TE engine mounts

If you think the Yanmar prices are bad (and they ARE), try the prices from Kohler on generator mounts. They wanted $1600 for the set! And it's a little 8KW generator. We came up with another (better) solution. Cost about $120.
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