90 rude 120 1 cylinder dead

W

wolfsmurf

Petty Officer 2nd Class
Joined
May 6, 2010
Messages
131
I've got good compression in 95-110 on all cylinders, the 1 in question will spark fire across 1/2 gap. Squirting fuel into the carb of that cylinder makes no difference in engine sound. Spark plugs have been changed. I have swapped coils, no change. How do I test The power pack? Any help is great!
 
M

multimech

Petty Officer 1st Class
Joined
Apr 26, 2012
Messages
386
Re: 90 rude 120 1 cylinder dead

Well for starters you have 15lbs difference between two cylinders. That is not good. Recheck the compression while engine is warm and throttle plates open.

It should jump a 7/16" gap with a blue spark. If compression is good. If spark is good. If fuel is good. Then you have an air leak near the cylinder causing you a problem. Spray around the cylinder (at halves and intake) see if your engine speed picks up.
 
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