Hey I am new to the forum and new to boats and I need help! I have done lots with cars but I just picked up a 76 invaider with a 77 johnson 115 outboard 2 weeks ago. The boat needed work but I got it all fixed up in a weekend and the motor worked great. I have already taken in out 3 times and the only engine problem I have had was it dies at idle when I first get going but it stops after its run for awhile. I just assumed it was normal for an old motor. I was out on the lake today and cruising along pretty slow because it was rough out and it just died. I tried to start it and the starter engages but won't turn the crank. I tried manual and it wouldn't budge. I got towed back and pulled the plugs and got it cranking and eventually got it to run but it seemed like it was having a hard time turning the crank and getting started. I put it back in the water and idled it high for awhile then it would just die and I killed the battery pulled it out and just called it quits. I don't know alot about boat motors so any advice would help. I am going to try compression test and leak down tomorrow.