Do you know if you still have the oiler gear on the crank? If not you gotta tear the motor completely down. I have all the parts you need except for...
Or Da Bomb.
4 wheel steering is cool and use to be a thing they put on cars. I think Porsche puts it on their sports cars. But it's a passive system...
Another suggestion I have is start a log book. Note everything you do. Each and every adjustment and change with your thoughts. Build a data base of...
That may be the best route. But before you do that see what you can find to try prop wise. I am not suggesting a new stainless prop. A good aluminum...