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Author Topic: engine mounts one more time  (Read 1185 times)

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glennd3

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engine mounts one more time
« on: March 25, 2021, 09:45:11 AM »

Would it make a difference if I replace the front mounts with the k75 and leave the rear mounts? I can do the front fairly easily.
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Glenn Davis
Knot Yet
1990 Catalina 34 Mk 1.5
Hull 1053
TR/WK
M25XP
Patapsco River
Chesapeake Bay Maryland

KWKloeber

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Re: engine mounts one more time
« Reply #1 on: March 25, 2021, 09:49:56 AM »

Of course.
If they donít need it then donít replace em. If they do then replace em.
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Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

Ron Hill

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Re: engine mounts one more time
« Reply #2 on: March 25, 2021, 02:43:25 PM »

Glenn : Sure!  You'll just have to see if you still get the "buzz' in your feet. 

You can always take the Vetus mounts apart to do the rear - which I've done with everything still connected!  If these are the original mounts I believe that you'll want to change all 4 mounts. Try 2 and see.

A few thoughts
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Ron, Apache #788

tvorgitch

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Re: engine mounts one more time
« Reply #3 on: April 27, 2023, 08:39:24 PM »

Ron,
How were you able to disassemble the Vetus mounts? When I try and remove the bolt, this weird nut on the bottom just spins, even with an impact driver. Even if I did get it apart, I would be concerned about assembling it.
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Tom Vorgitch
Goose III
1993 Catalina 34 Mk 1.5
Hull 1235
TR/FK
M35
Ventura, CA

Ron Hill

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Re: engine mounts one more time
« Reply #4 on: April 28, 2023, 03:21:44 PM »

tvo : you need to put a vice grips on that underside nut to hold it so you can unscrew the threaded shaft.

A Thought
« Last Edit: April 28, 2023, 03:22:57 PM by Ron Hill »
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Ron, Apache #788

Noah

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Re: engine mounts one more time
« Reply #5 on: April 28, 2023, 04:02:41 PM »

Ron- I donít get it??? If it takes a vice grips to hold the nut underneath, which mean the nit is not ďcaptiveĒ, how would you hold the nut to tighten the stud once the mount is turned right-side up under the engine, let alone bolted down?? I am confused.
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1990 hull #1014, San Diego, CA,  Fin Keel,
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tvorgitch

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Re: engine mounts one more time
« Reply #6 on: April 28, 2023, 05:30:19 PM »

Yes, this is my concern. I read about this approach here: https://forums.sailboatowners.com/threads/motor-mounts.175915/#post-1257331

I will call Vetus on Monday.

I will ask if it's possible to put 2 (or 3) small self-taping screws in the plate nut to hold in place for disassembly and reassembly.
« Last Edit: April 29, 2023, 07:17:44 AM by tvorgitch »
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Tom Vorgitch
Goose III
1993 Catalina 34 Mk 1.5
Hull 1235
TR/FK
M35
Ventura, CA

Ron Hill

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Re: engine mounts one more time
« Reply #7 on: April 29, 2023, 08:31:27 AM »

Guys : The idea is to unscrew the threaded shaft out of the mount so you can place the mount under the bracket on the engine. Then screw the shaft back into the mount. I've done it a couple of times.

A thought
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Ron, Apache #788

Noah

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Re: engine mounts one more time
« Reply #8 on: April 29, 2023, 09:57:35 AM »

RON- I hear what you are saying but he said the nut SPINSómeaning the nut is NOT captive. How to you retighten the stud later if you cannot hold the nut again once the mount is down??
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Ron Hill

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Re: engine mounts one more time
« Reply #9 on: April 29, 2023, 12:39:21 PM »

Guys : Sorry, I guess that Vetus must have redesigned their mounts ?!? 

So to do what I mentioned (remove the threaded shaft) you'd have to tack weld a spot to hold that underside nut in place.

A thought
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Ron, Apache #788

waughoo

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Re: engine mounts one more time
« Reply #10 on: April 29, 2023, 04:55:10 PM »

tvo : you need to put a vice grips on that underside nut to hold it so you can unscrew the threaded shaft

I thought vice grips were employed in your method
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Alex - Seattle, WA
91 mk1.5 #1120
Std rig w/wing keel
Universal M35
Belafonte

Ron Hill

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Re: engine mounts one more time
« Reply #11 on: April 30, 2023, 03:19:55 PM »

Alex & Guys : The older K75s must have had a Welded? Stationary thread in the mount itself - which has change to a free pined nut in the underside!!

A thought
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Ron, Apache #788

WBev

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Re: engine mounts one more time
« Reply #12 on: May 01, 2023, 09:09:38 AM »

I replaced my rear engine isolators, originals, in April of 2022 using Vetus K75s.  I put the base into a vise at home.  I used an 8mm allen wrench on top of the post.  They come apart.  Don't overthink it like I did.  The post is on with a loctite like product, so once you crack it, away you go.  I used the same, blue loctite, when I put the post back on the isolator with the base screwed to the engine joist. 

In 2021 I replace the front isolators, originals, with Vetus K75s.  I couldn't build up the nerve to cut the rear ones off during sailing season.   Yes, it did make a difference, but my port side front original was completely shot, so ymmv.  The front took about 20 minutes each side, including putting in new lag bolts. The engine supported itself on three, so really an easy job.

Glenn - if you are still on the hard, let me know. 
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Wobegon II
1992 C-34 MK 1.5
 #1211,  Wing/Tall Rig
Magothy River, MD

tvorgitch

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Re: engine mounts one more time
« Reply #13 on: May 01, 2023, 10:37:27 AM »

I called Vetus and they confirmed that there was a design change about 4 years ago.

WBev, were you able to reassemble the engine isolators using the flat nut pictured above?

I assume if I get my fingers under that that might be possible.
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Tom Vorgitch
Goose III
1993 Catalina 34 Mk 1.5
Hull 1235
TR/FK
M35
Ventura, CA

tvorgitch

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Re: engine mounts one more time
« Reply #14 on: May 01, 2023, 05:46:13 PM »

Ok, it turns out the nut is captive. After a few drops of acetone on the bottom of the bolt, I was able to disassemble the mount. You can see that the threads go all the way through the mount. I'm confident that once I clean the threads, I'll be able to reassemble it without any difficulty.

Thanks for all the help!
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Tom Vorgitch
Goose III
1993 Catalina 34 Mk 1.5
Hull 1235
TR/FK
M35
Ventura, CA
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