I found the problem. The four pin connector at the main tank had a broken wire on the back one of one of the pins. Which made it intermittent . Removed
How big is the boat got pics? A good aluminum welder should be able to design a jack plate that will work but for a 50hp motor you may have issues getting
Can you give us an update on what happened with your motor? Even it is was not related to the engine, fuel issues, water, whatever, will be helpful.
I am seriously considering the 6.0 for my 26' Shamrock rebuild. It started life with a 351 around 250hp, then to a Marine Power 5.7 and now an empty hole
I had the same problem. I needed a used extra long shaft motor, and they are hard to find in good condition in my area. I went with a electric jack plate,