Hi, everybody. Been out of touch for a few weeks due to rootkit trojan on computer and no time to mess with it, so turned off wireless and let it sit. Just re-staged yesterday. Been building a wooden fence to hide my canoe trailer (bullshit HOA rules).
Anyway, next project is refurbing if possible the trim-tilt unit on my bay boat. This is a 1999 Yamaha 150 hp 2-stroke. Took it to the fixit shop near where we keep the boat (about 200 miles to the coast), their fix is replace the whole dang thing for over 2 boatbucks plus labor. Figured it was worth a look a that price, plus the trim-tilt is easy to remove as a subassembly, so I brought it home.
So far, I've got the motor/gear pump off. Corrosion in the threads is bad, as you'd expect for something on the bracket of a marine outboard. One cap screw broke off, leaving a decent stub. Others were stubborn as grim death, but eventually yielded to lots of heating and PB blaster, alternating over a few days. The broken cap screw has yet to yield. Continuing the same treatment, a little fire, a little PB Blaster. This is into a flat machined surface sealed by multiple o-rings for the different passages. Leak was at this interface.
Worst case, I can buy the new unit and save the labor costs. But it's worth a lot if I can get the bolt out. I'll probably helicoil the holes and use a good antiseize if successful. Realistically, if the boat lasts another 20 years, it'll be somebody else's problem (I'm
61).Am I missing any good tricks? I remember something about dissolving steel and leaving the aluminum for broken taps with alum, but will it work on stainless? Thanks.
Pete Keillor