I have a 1995 Johnson 90hp ocean runner on a 17ft McKee craft. 17x13 1/4” prop. Won’t go over 4000rpm at WOT.
What’s been done to this point:
New champion plugs
New CDI power pack
New Johnson coils
New CDI optical sensor
New CDI stator
New CDI plug wires
Carbs rebuilt with new bowls (all Johnson parts)
New fuel filter
Replaced VRO with new Johnson fuel pump
Link and sync done by local Johnson mechanic
New flywheel
All new fuel lines from tank to motor
New vent hose from tank to filler
New pick up in tank (no change on portable tank)
Compression is around 120ish on all 4 cylinders
Replaced tach with new
Motor runs fine at idle, mid range, and no noticeable miss at WOT.
All cylinders arc from boot to plug over 3/4”
I am completely at my wits end with this motor. I have no idea what else it could be.
What’s been done to this point:
New champion plugs
New CDI power pack
New Johnson coils
New CDI optical sensor
New CDI stator
New CDI plug wires
Carbs rebuilt with new bowls (all Johnson parts)
New fuel filter
Replaced VRO with new Johnson fuel pump
Link and sync done by local Johnson mechanic
New flywheel
All new fuel lines from tank to motor
New vent hose from tank to filler
New pick up in tank (no change on portable tank)
Compression is around 120ish on all 4 cylinders
Replaced tach with new
Motor runs fine at idle, mid range, and no noticeable miss at WOT.
All cylinders arc from boot to plug over 3/4”
I am completely at my wits end with this motor. I have no idea what else it could be.