2001 Johnson 50 HP Spark on one plug

[slipnot52]

Have a 2001 Johnson 50 HP just started having problems recently. I took the pontoon out and ran compression check have 120 in both cylinders. Clean new fuel filter. I switched spark plug cables around. I am not getting "spark" to the top cylinder regardless of which spark plug wire I tried so it has to be upline. Any help would be appreciated. New to the forum. Thanks!

 

[Haffiman]

Re: 2001 Johnson 50 HP Spark on one plug

Might be power pack, might be sensor coil.
Check for signal going into power pack from sensor coil, best to use a DVA, but even a multimeter might do. If signal from sensor coils and swapping coils make no difference, change power pack.