Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-25-2018, 03:21 PM   #1
Senior Member
 
Westiculo's Avatar
 
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
Generator motor mounts - sound isolation

The raw water pump on my generator (westerbeke 8BTD) has been leaking since well before I bought the boat, completely rusting out and destroying one of the mounts. I fixed the pump, but the generator is really loud since the mounts aren't doing their jobs anymore.
Any recommendations on what mounts to get?
I want whatever offers the best vibration isolation for soundproofing. The engine weighs a bit under 500 pounds.

Thanks!

See pictures, good vs bad.
Attached Thumbnails
Good.JPG   Bad.JPG  
Westiculo is offline   Reply With Quote
Old 04-25-2018, 04:30 PM   #2
Senior Member
 
cool beans's Avatar
 
City: Norfolk, VA
Vessel Model: Bayliner 3870
Join Date: Jul 2015
Posts: 308
Following along as I'm in a similar situation. Though, I'm one to believe the rotten frame rail is leading to more movement and noise than bad mounts. Mine are extra squishy which I think would make for excellent dampening if not for the compromised steel stringer.
cool beans is offline   Reply With Quote
Old 04-26-2018, 07:12 AM   #3
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 22,553
Soft anti vibration mounts are part of a System.

The exhaust , fuel supply and electricals must be able to flex with the noisemaker.
FF is offline   Reply With Quote
Old 04-26-2018, 07:26 AM   #4
Guru
 
City: LI or Fla
Join Date: Jul 2013
Posts: 1,148
Rather then re-engineer what was well engineered from manufacturer, get a replacement set of engine mounts and you will be good to go.
The enemy of good is better.............................
Marlinmike is offline   Reply With Quote
Old 05-03-2018, 11:36 AM   #5
Senior Member
 
Westiculo's Avatar
 
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
My solution - not to say it's the best, but it seems pretty good. The mounts are from tech products, the heavy-duty stable flex. Pretty dang cheap, but seem high quality (also are in stainless). The whole setup is stronger than the original. The original had the steel rails which seem strong, but they were mounted to a single 3/4 inch piece of ply which was suspended between two aluminum capped stringers. I doubled up on the ply, and suspended it between all 4 stringers, making it much stronger even without the steel rails. Added a little glass for abrasion resistance and waterproofing. Hoisted the machine with a couple of home depot turnbuckles off of a clothing bar also from home depot that I had laying around the boat. No problems. Pretty simple fix.
Attached Thumbnails
hoisting method - not real pretty, but functional.JPG   Replaced destroyed mount.JPG   stbd side generator mounts.JPG  
Westiculo is offline   Reply With Quote
Old 05-03-2018, 11:38 AM   #6
Senior Member
 
Westiculo's Avatar
 
City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
also, it was impossible to remove the bolts because they were too rusty. The trick was to hoist the generator some so the pressure is off of the feet, then get under the feet with a hack saw and go to town. I hope to never do that again. The bolts must be grade 8, because they completely destroyed my dremel and oscillating tool bits.
Westiculo is offline   Reply With Quote
Old 05-03-2018, 11:52 AM   #7
Guru
 
menzies's Avatar
 
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
My tech found the exact same problem with my Northern Lights genny in March when doing the annual service. The weep hole in the pump was doing it's job and signaling that the pump was going bad. Unfortunately it had ruined one mount. He bought replacement mounts (two to a pack) and left the other with me.

I have just looked at it and it is a Lord 283p-220.
menzies is offline   Reply With Quote
Old 05-03-2018, 01:59 PM   #8
Senior Member
 
neworleansrich's Avatar
 
City: New Orleans
Vessel Name: Catalyst
Vessel Model: 50 ft Power Cat
Join Date: Sep 2013
Posts: 141
On my Defever, I have a Westerbeke 12kw that had the same issue. I bought some blower mounts from Grainger that have been great and are still in place to this day. I mounted them on two sections of painted (treated) 2x4s to get the generator a little higher to make it easy to work on and clean underneath.

As you look through Grainger's selection, you want to upsize the mounts and look for those that handle some side loading to handle the boat's healing and pitching.
neworleansrich is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 03:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012