I was trying to get the screws loose on my 2002 Murcury 125 OB trim sending unit. I sprayed them up for 2 days with PB power break and then rapped them with my impact driver. I thought they were loosening so I put the bit in my ratchet and with a little pressure they stated turning, I twisted both the screw heads off. One has about 4 threads sticking out, the other is almost flush. I gues the only thing left to do is drill and re tap.
5string
5string