Engine mounting bolts. - SailNet Community
LinkBack Thread Tools
post #1 of 3 Old 11-20-2006 Thread Starter
Junior Member
Join Date: Sep 2005
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Engine mounting bolts.

When I tightened the starboard foreward engine mounting nut (the one under the starter) it broke off. Is there a procedure for re-securing the engine there if you can't get a drill to it to drill it out? It's a stud tapped into glassed over wood. No under access. Any ideas out there?
CowboyPhD is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 3 Old 11-20-2006
Reward for lost Kraken!
hellosailor's Avatar
Join Date: Apr 2006
Posts: 11,674
Thanks: 6
Thanked 141 Times in 138 Posts
Rep Power: 11
Is this a motor mount, or a simple stud set into a hard point?

Usually for a broken stud, you would either arc weld a bar to it, and then spin it out, or drill down into it (with a hardened metal bit) and then insert an "Easy out", which screws in and then screws the stud out. (They're reverse threaded.)

Could you get in there with a right-angle drill? A right-angle adapter? A Dremel with the flex adapter on it?

You could probably rig a saddle over the mounting foot to hold it down, as long as there's enough stud to keep it centered properly...a kludge job but one that could be perfectly good if inelegant.

Last edited by hellosailor; 11-20-2006 at 10:27 PM.
hellosailor is offline  
Quote Quick Reply Share with Facebook
post #3 of 3 Old 11-21-2006
the pointy end is the bow
erps's Avatar
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,260
Thanks: 2
Thanked 27 Times in 26 Posts
Rep Power: 11
If this is a mount bolt securing one of the flexible engine mount pads to the stringer, there might be another way to patch it up if you can't get the bolt out. The engine mount pads usually have one end with a round hole, the other side often has an oblong hole so you have some wiggle room for adjusting shaft alignment etc. Turn the mounting pad 180' and drill another hole next to the broken bolt for a lag bolt.

If there is enough of a stub of the old stud sticking up, remove the engine mount and see if you can get at it with vice grips or a small pipe wrench if there is no room to drill. Soak with WD-40 or penetrating oil before attempting to spin it out.
erps is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Runaway Diesel Engine Ben Hilke Gear and Maintenance Articles 0 07-19-2004 09:00 PM
Keel Bolt Concerns Don Casey Gear and Maintenance Articles 0 10-12-2003 09:00 PM
Surveying a Diesel Engine Tom Wood Buying a Boat Articles 0 01-26-2003 08:00 PM
Surveying a Diesel Engine Tom Wood Gear and Maintenance Articles 0 01-26-2003 08:00 PM
Replacing the Diesel Engine Sue & Larry Gear and Maintenance Articles 0 06-12-2000 09:00 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome