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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...
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...
