Hello I'm 21 and just bought my first boat for 400 bucks with my buddy. It's a 19' fiberform with a 73 johnson 115. We did all the basic tune-up things and got it running mint. What was done to this engine by the previous owner is a story for another day.
The engine ran and sounded great in the driveway, everything seemed to work properly so we took it out!
While idling up and down the river it seemed fine.. maybe a little burst of exhaust here and there.. I didn't really think much of it. So I decide alright, lets take it into the bay. It got up on plain but quickly started misfiring. Not enough of a misfire to take it off plane but it was noticeable. So I shut it off, switched gas tanks, checked out a few things.. no change. I took the boat right back in.
When I got it home I decided, okay lets pull the plugs. The first plug I pulled out was messed up. The ground electrode was bent all the way into the middle electrode. So basically there was no gap left.
Since I refused to believe there was something wrong with the engine I worked so hard on, I re-gapped it, ran it in the yard. Ran great plug looked great.
I took it out again, but the waves were way too rough. I took it out and took it right back in because my bilge wasn't working properly and we were taking on way too much water. But for that short time it ran great, felt as if all the power was there.
When back at the house I decided to inspect the plug again. The gap wasn't completely gone but the electrode was hit again. Now I know I can't just take it out before something really serious happens to the engine.
I'm thinking its a worn bearing, but I don't know much at all considering this is my first boat. It's pretty disappointing to work on something for so long, spend every cent you have on it... then this happens. But I still want to fix it, I need to.
If anyone has a better idea what happened to it or what I need to check or anything I can do.. your insight would be appreciated.