Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 07-05-2009, 20:33   #1
Registered User
AaronJ's Avatar

Join Date: May 2009
Location: Indialantic, FL
Boat: Hunter 30 - "Nolina"
Posts: 26
Replacing Mounts w/o Pulling Engine

My mechanic told me he can replace the Yanmar 2GM20F motor mounts without pulling the engine out. He suggested supporting the engine under the oil pan with a jack and replacing the mounts one by one. Does anyone have experience with this? It doesn't sound like rocket science, so I'd like to do it myself...including shaft alignment afterward.

AaronJ is offline   Reply With Quote
Old 07-05-2009, 21:33   #2
Registered User
James S's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: Yemen & Lebanon... the sailboat is in Lebenon, the dhow is in Yemen
Boat: 1978 CT48 & 65ft Cargo Dhow
Posts: 5,789
Images: 139
I would not support the engine under the oil pan unless it is designed to hold that kind of weight and I have no reason to believe they are.
But you can certainly change the mounts as he said but support under more substantial areas.
You may also be able to hang/support from the top.

S/V Arctic Lady
I love my boat, I can't afford not to!
James S is offline   Reply With Quote
Old 08-05-2009, 05:12   #3
Eternal Member
imagine2frolic's Avatar

Join Date: Feb 2008
Location: Las Brisas Panama AGAIN!
Boat: Simpson, Catamaran, 46ft. IMAGINE
Posts: 4,508
Images: 123
What about using the boom for a support to lift the engine? This is how I removed my motor. Tied the halyard over where the lifting point was to be. Wrapped a strap around the boom with block, and lifted.......i2f
SAILING is not always a slick magazine cover!
BORROWED..No single one of is as smart as all of us!
imagine2frolic is offline   Reply With Quote
Old 08-05-2009, 05:57   #4
Sponsoring Vendor
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 2,888
One way, there are a couple of unused threaded holes on the side towards the back of the 2GM20F. I made a small 90 degree bracket that could be bolted to those and then used a jack to life one side at a time to replace the mounts. This job certainly can be done without removing the engine. I would frown upon jacking any engine by it's oil pan.
Tellie is offline   Reply With Quote
Old 08-05-2009, 07:49   #5
Registered User

Join Date: Apr 2007
Location: house-North Vancouver BC boat-barra de navidad
Boat: c&c landfall 43
Posts: 120
Totally can be done I just finished this job myself and had the same conversation with my local mechanic. I rented a jacking kit which came with a scissor type jack or spreader type this worked great for the tight areas. I disconnected the shat from the tranny and replaced one mount at a time alot easeir than I thought it was going to be.
limmer is offline   Reply With Quote
Old 08-05-2009, 07:57   #6
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 3,720
The oil pan may be strong enough, but if you support the engine on it the pan gasket will start leaking oil, especially from British engines which still use cork gaskets...the voice of experience.
donradcliffe is online now   Reply With Quote
Old 08-05-2009, 08:08   #7
Registered User
r.furborough's Avatar

Join Date: Oct 2008
Location: Norfolk, VA
Boat: Freedom 32 (Hoyt)
Posts: 223
The oil pans on Yanmars are generally cast aluminum and can take the weight of the engine. When lifting the engine some have tried using a deflated basket ball and then inflating it to lift the engine with success.
the memories of a man in his old age, are the dreams of a man in his prime
Pink Floyd - 'Free Four'
r.furborough is offline   Reply With Quote
Old 08-05-2009, 15:26   #8
Registered User

Join Date: Sep 2007
Location: Colombo
Posts: 1,059
I am not too familiar with the particular engine but as far as I know (I may be wrong) the feet on the engine that the mount stud goes through are removable. If so can you not just remove them one at a time - foot and mount all in one piece - attach the new mount to the foot and bolt back onto the engine?

The engine will sag a little in the corner the current mount and foot is off as the diagonally opposite mount goes into tension to support the engine but the adjustment in the new mount can be used to jack it back up again.
MidLandOne is offline   Reply With Quote
Old 09-05-2009, 20:21   #9
Senior Cruiser
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,138
I2F described exactly what I did to fix a leaking oil pan, but instead of just a loop around the boom, I also added a line as an outhaul.
Between the halyard (vertical lift) the outhaul (fore and aft control) and the traveler, I had 3D control of the engine. I just hung it to remove the pan from the comfort of my cockpit.

Of course, you only need to lift it a few inches,, but the same theory might apply to your situation.

Steve B.
senormechanico is offline   Reply With Quote
Old 09-05-2009, 20:50   #10
Registered User
Maddog's Avatar

Join Date: Jul 2005
Posts: 318
My mechanic did it with a hydlaulic press, lifting each foot one at a time. Very simple.
It's kind of like tearing up $100 bills while standing in a cold shower.
Maddog is offline   Reply With Quote
Old 09-05-2009, 21:04   #11
Moderator Emeritus
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
My mechanic did it with a hydlaulic press, lifting each foot one at a time. Very simple.
That really is the easy part. Doing the shaft alignment is the part that is not so simple. The good news is you don't do that untill you replace the mounts. All of them is just the only way to go.

Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Corroding Engine mounts ccannan Engines and Propulsion Systems 6 28-09-2015 23:13
Changing Engine Mounts davefm3 Engines and Propulsion Systems 5 05-08-2008 19:38
Engine Mounts wallyf Engines and Propulsion Systems 7 04-07-2008 14:11
Pulling an engine Stevek Engines and Propulsion Systems 11 22-10-2007 00:43
Engine mounts - When to replace? dkall Engines and Propulsion Systems 5 13-01-2007 03:49

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:56.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.