Originally Posted by SailnParadise
Impact wrench and heat did work. Any other suggestions before i cut the heads?
Sometimes cutting the head
and/or drilling the screw out is faster and easier than trying to screw it, especially with dissimilar metals in a marine environment
If you drill it out, be sure to get LOTS of drill bits as it can take a number of them before finishing the job depending upon the makeup of the screw and drill bit. Titanium or carbon steel
drill bits are more expensive but more effective. Go slow and use lubricant. Be sure to try an EZ out screw extractor
first and you might get lucky (great use of 12 bucks).
If you wish to minimize scratches/damage to the bow roller surface, you can protect the area surrounding the screw with tape and even a piece of wood
, delrin, starboard, any scrap with a hole that allows access to the screw while protecting the surrounding area.
The big question for me is what is it screwed into? You might need to tap or helicoil the hole (for metals) or fill it and create a new hole (for wood). You could try going a larger size screw as well once it's out. For an older boat
I've learned the value of keeping all the tools needed for this on board.
And since your photo
shows bolts, I would replace the screws with hex head
bolts (metals) or lag screws (for wood) instead of those annoying and hard to work with screws.