Does anyone have any tips for extracting bolts with broken heads. A majority of the screws, nuts, and bolts have excessive mineral deposites on them. I have tried penatrating oil, heating with a torch, hitting with a hammer, and yelling curse words at it and have had no success. I broke one off in the head and am trying to ket it out.<br /><br /><br />Help<br /><br />Evinrude trouble
<br /><br />Learn to use heat and lots of it when removing bolts. When they break anyway:<br /><br />If possible have someone weld a nut onto the top of the broken bolt.<br /><br />If thats not an option, get a good set of drill bits and a center punch and drill out the broken bolt. Usually you will have to install a helicoil kit (which allows you to use the original OEM diameter bolt).<br /><br />I find it handy to have a Dremel tool and a carbide tipped tile grout remover bit for fine work such as recentering a hole.<br /><br />Now you know why the marine mechanic has such a colorful vocabulary and charges so much.