Re: 1967 evirude 80hp model#80753
mine did the same thing when i first got it, i have a 1974 70hp and it was a bad coil. 2 cyclinders was firing fine, other had no spark. it would idle fine but going down the lake just missed and wouldnt gain rpms. i thought it wasnt a spark problem because it idled fine but it fooled me. check to make sure all cyclinders are firing.