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Go Back   SailNet Community > General Interest Forums > Gear & Maintenance > Engines > Gas > Atomic 4
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  #1  
Old 11-20-2006
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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?
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GCC.
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Old 11-20-2006
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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 09:27 PM.
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Old 11-21-2006
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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.
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