I have a 1986 110 hp evinrude vro. I put a regular fuel pump on it 4 years ago and mix the gas by hand. Ran great for 4 years. Last time I went out I floored it and it stalled. Started back up floored it again, rumbled, hesitated and eventually went to W.O.T. Changed out my 3 trip old champ. plugs with last years plugs. Had no effect. Noticed that 1 of em was wetter than the other 3. Stumbled but made it to dock. Today in the yard I ran it. Reved up in neutral but was missing. Put in gear and floored it briefly and repeatedly. Started to rumble and stalled. Started back up. Reved in neutral and ran for a bit then rumbled and shut off. Checked compression. 2 were 110 one was 115 and the other was 120 psi. Ran motor and pulled spark plug wire off on suspect cylinder and motor ran the same. Assumed that coil is bad. Removed the suspect cylinder's spark plug from block left it in its wire and grounded it. Big blue spark. Switched the suspected bad coil with a known good one. Same problem. Replaced champion plugs with brand new autolites. Same thing. 1 wet plug on the misfiring cylinder. What next?
