Recent content by sojo81007

My 1966 Evinrude Big Twin has developed a unique problem. It usually starts up and runs fine but does so only on the top cylinder. About 1/2-2/3 throttle the other cylinder will suddenly cut in and the engine opens up and runs fine at high planing speeds. I believe it is fuel related because...

Re: 1966 Evinrude Big Twin 40hp Running on One Cylinder...but has spark at both plugs I've got the wires properly seated in the coils, everything is bolted back together. (I wrapped the kill wires in electrical tape just to be sure there was nothing going on with them.) I've checked and...

Re: 1966 Evinrude Big Twin 40hp Running on One Cylinder...but has spark at both plugs Here's a picture of the inside, not sure how well you can see. It did seem to have a small nick on the side. I will order a new key.

Re: 1966 Evinrude Big Twin 40hp Running on One Cylinder...but has spark at both plugs I put the engine in my test tank, totally disconnecting the safety/vacuum switches. It didn't change anything - the problem isn't there. When I removed the flywheel I noticed the one coil has a nick on the top...

On a recent trip to the lake my Big Twin began running on one cylinder. This happened at the dock, and it had run fine on the previous trip several weeks before. I checked spark, and it seemed that the top cylinder had none. I pulled the flywheel and found that one of the coils was broken in...