I'm trying to get the prop shaft out of my Clansman to replace the cutless bearing, probably the gearbox coupling also as its badly rusted on the gearbox side, and eventually move the engine back to access the bilge pump, float switch and clean the bilge.
I've removed one grub screw but the second one is rusted in. I've soaked it for days with WD40, but my good quality allen keys are twisting with the effort - using an extension on them.
I gave up and decided to drill it out, but good quality sharp drill bits are no match for the hardness of the screw and they get blunt quickly (using lubricant and slow speed) with little impression on the grub screw. The little bastard seems to be indestructible!
I'm reluctant to put a torch in there to heat it, but have now run out of ideas.
Does anyone have a suggestion?