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How to remove stripped bolt

E

Eldorado

Member
Hey guys I have a bolt here on the lower unit that is completely rounded. I have sprayed it with lubricants and even bought an expensive bolt extractor that stripped the bolt further. The bolt extractor is the socket type that fits around it. I would buy the extractors that drill into the center, however, the prop shaft is preventing the drill fit from entering straight. I also heated it up with a torch. Bolt was 3/8 but is probably more like 9 mm now. Also,
it is recessed a little so I can't get vise grips in there. 20170610_142329.jpg.
 
Done more that one of those.----------Weld a nut on there is one option.---------I have broken / chiseled the trim tab off too ( have lots of replacements on hand ) then use heat to get the bolt out once tab is gone.
 
Not sure what you have in your work shop / tool kit.---------That is one option.----If chisel approach sound brutal to you them rent an angle drill and drill head off the bolt.
 
Last edited:
Its a screw like bolt it has no nut. Here is where I am now guys. I lubed it with liquid wrench penetrating lube for about a week. And use vice grips. I also tried fitting a smaller socket on by heating it up but it simply wasn't tight enough. Finally I took it to a local man to weld a nut onto it as a better head. Instead he first tried the bolt extractor method. When he finally welded on the nut the bolt shredded in two. Now if got a basically flush vilt with a cock eye hole on it. So I try the screw exyractor method again but the other hole is no good and neihter is the one I made. Should I take it in to a shop? Have them fill it, rebore it, and rethread it? All this bolt does is hold on the trim tab, after all.20170617_204609.jpg
 
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