50 outboard's pivot tube has been getting stiffer and stiffer. I used to be able to free it up with a quick blast of a butane torch, but that doesn't do the trick anymore.
There is a grease nipple/zirk at the top and bottom. I have tried greasing there and clean grease squeezes out. It doesn't help.
I expect what has happened is that the grease has solidified inside, maybe with a bit of corrosion
mixed in. I should really pull it apart and clean it properly, but I dare not touch it. It is a major task of surgery to strip it and there are corroded expensive parts
that will most probably break if I do try to pull it apart, so I would rather not. The plan is to get a few more years out of it before repairs
become uneconomic and I have to get a new one.
So how do I deal with that old grease? I thought I might fill up a grease gun with something and try to flush it out. Is there a magic solvent that dissolves old grease well and allow me to fill it up with new again?
Any other suggestions?