" My 1986 115 seems to have one cylinder that does not work when the engine is cold. After about 15 minutes or so you can feel the power gain or if its driven for a few minutes, shut off for 10 minutes and restarted, it runs good. Compression is 115-120 in all cylinders. I checked the spark when cold and the top 3 cylinders aren't sparking, the bottom three do but there is no way its only running on three when its cold. I figured it was only the top giving me problems. The coils look like their bundled in three. Is it possible all three are intermitantly bad? any suggestion would be appreciated. "