1991 Johnson GT 150-1cylinder miss- HELP

[wmsthree]

1991 90 degree V6 cross flow 150hp 35amp charge system. Problem: Dead cold, runs fine. Get 1/2 mile down river, drops number 5 cylinder (bottom cylinder on drivers side bank). Other 5 cylinders running great according to plug readings. Replaced coil and wire on number 5, still same problem. Replaced power pack with brand new OMC factory replacement, still same problem. I am now down to the timer sensor, but dealer (who desperately wants me to bring it in so he can RIP ME OFF - I am speaking from experience here, not bad-mouthing dealers)says it might be stator. Please correct if wrong - timer sensor has 6 double wound coils, 1 used for start, 1 used for run. Stator coils supply power to power pack. If stator was bad, wouldn't I have more than one cylinder misssing? SOMEONE PLEASE HELP. I have been struggling with this problem for several months - I really want to get my boat running so I can go fishing and spend time with my Dad, which is very important to me. Any advice will be apprieciated.

 

[Bear]

Re: 1991 Johnson GT 150-1cylinder miss- HELP

What does the #5 sparkplug look like when it goes dead? Is it wet or dry?<br />Did you ever replace this spark plug? Put it on the other side and see if the problem moves.<br /><br />If the #5 sparkplug is dry it might be fuel related. Probably a stuck float or float valve. There could be just two positions, fully closed and almost fully closed. The #5 carb just run out of fuel. Working fine for half a mile you says. Is that distance shorter if you go fast and longer if you go slow? <br /><br />I hope you'll go fishing any day now.<br /><br />/Bear