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Old 13-06-2010, 14:50   #16
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Here is another alternative PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D I cannot endorse them as I have not tried them, but R&D make a good product and it may be a good alternative.
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Old 24-06-2010, 07:10   #17
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Originally Posted by MoonlightSailor View Post
I recently had work done on my 4JHTE and the motor mounts will need to be changed soon. The mechanic stated that all 4 of the mounts ARE NOT the same size (port vs starboard). The reason he said was because of the torque of the engine displacing more force to one side than the other. Is this reasoning correct?
No. The harder rubber mounts go on the front of the yanmar diesel, the softer ones on the rear. In my case it was D50 rear and D70 forward.

I had actually reasoned the opposite. It wasn't until I located the Yanmar installation manual did I discover my error. I took the engine out a 2nd time and swapped the mounts.

It's a boat (sigh) .......
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Old 18-03-2011, 14:26   #18
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Re: Yanmar Engine Mounts

2GM20F

Seeking Yanmar engine mounts YD-4096 #100.

Are these Yanmar engine mounts obsolete? If so, what replaces?

Thanks, Roger



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Old 18-03-2011, 15:43   #19
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Re: Yanmar Engine Mounts

Quote:
Originally Posted by Tropic Cat View Post
No. The harder rubber mounts go on the front of the yanmar diesel, the softer ones on the rear. In my case it was D50 rear and D70 forward.

I had actually reasoned the opposite. It wasn't until I located the Yanmar installation manual did I discover my error. I took the engine out a 2nd time and swapped the mounts.

It's a boat (sigh) .......
When I bought my 3JH4E the heavier (150) were on the port side with the lighter (100) on the stbd side. In some manuals it also recommends changing out mounts every 1000 hours.
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Old 18-03-2011, 16:10   #20
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Re: Yanmar Engine Mounts

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Originally Posted by rpeebles View Post
2GM20F

Seeking Yanmar engine mounts YD-4096 #100.

Are these Yanmar engine mounts obsolete? If so, what replaces?

Thanks, Roger
not obsolete
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Old 20-03-2011, 15:35   #21
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Re: Yanmar Engine Mounts

Good, where can I find them?
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Old 20-03-2011, 16:30   #22
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Re: Yanmar Engine Mounts

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Originally Posted by rpeebles View Post
Good, where can I find them?
Where are you located? Yanmar has territorial reps.
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Old 20-03-2011, 18:24   #23
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Re: Yanmar Engine Mounts

Texas thanks!
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Old 20-03-2011, 18:31   #24
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Re: Yanmar Engine Mounts

Get R&D mounts. They have same sized replacements for yanmar mounts and are much better mounts for the same or less money
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Old 20-03-2011, 18:41   #25
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Re: Yanmar Engine Mounts

I just replaced my mounts for my 3JH with the R&D. They are much beefier than the OEM and at cruising speed I can really tell the difference. They aligned nicely and so far I'm very pleased. They were $114 at Port Supply, but had to be ordered and I have to pay the shipping.
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Old 20-03-2011, 19:22   #26
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Re: Yanmar Engine Mounts

Quote:
Quote:
Originally Posted by Tropic Cat
No. The harder rubber mounts go on the front of the yanmar diesel, the softer ones on the rear. In my case it was D50 rear and D70 forward.

I had actually reasoned the opposite. It wasn't until I located the Yanmar installation manual did I discover my error. I took the engine out a 2nd time and swapped the mounts.

It's a boat (sigh) .......
When I bought my 3JH4E the heavier (150) were on the port side with the lighter (100) on the stbd side. In some manuals it also recommends changing out mounts every 1000 hours.
I do see from this chart http://www.pyiinc.com/images/pdf/rd/...R%20YANMAR.pdf that some Yanmars do use different mounts in front/rear vs P/S.

Also this chart shows the interchange part #'s for the R & D mounts from Yanmar.

Also, here is the list of Yanmar dealers in TX. > Yanmar - Distributor or dealer
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Old 21-03-2011, 09:44   #27
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Re: Yanmar Engine Mounts

My original mount centers are about 6.75".

No replacements I have seen are this size. What gives? Do I have to get some kind of adapter fabricated?

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Old 21-03-2011, 10:05   #28
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Re: Yanmar Engine Mounts

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Originally Posted by rpeebles View Post
My original mount centers are about 6.75".

No replacements I have seen are this size. What gives? Do I have to get some kind of adapter fabricated?


We don't have a yanmar but changed to these mounts (without the yanmar adapter). I've found that being stiffer than the originals the initally transfer more vibration to the hull, but once motoring at normal cruising speed the whole mess was quieter than before. I attribute this the less engine movement keeping things lined up better, but what do I know

http://www.pyiinc.com/images/pdf/rd/...R%20YANMAR.pdf
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Old 21-03-2011, 10:48   #29
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Re: Yanmar Engine Mounts

To clarify...this is an original yanmar engine mount for a 2GM20F attached to a KM3V v-drive transmission. This mount attaches to brackets that attach to the v-drive case. All the new mounts that I have found have a 4 inch mounting hole spacing. These original mounts have a 6.75 inch spacing.

The boat is a 1988 33' CKY cat ketch. Thanks again!
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Old 21-03-2011, 11:27   #30
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Re: Yanmar Engine Mounts

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Originally Posted by rpeebles View Post
To clarify...this is an original yanmar engine mount for a 2GM20F attached to a KM3V v-drive transmission. This mount attaches to brackets that attach to the v-drive case. All the new mounts that I have found have a 4 inch mounting hole spacing. These original mounts have a 6.75 inch spacing.

The boat is a 1988 33' CKY cat ketch. Thanks again!
the pictured mounts are standard issue mounts for a 2/3 GM, YM series engine. The smaller mount you are finding is for a 1GM
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