I have a 1996 Johnson Ocean Runner that has been intermittently cutting on and off over the past couple of years. It first happened during a 20-25 mile run in from offshore. While cruising at a constant 25 knots or so for 30 minutes or so the motor feels like it completely shuts off then back on very quickly. It will do this in succession a few times then if I let off the throttle, it smooths out. Sometimes the motor quits completely but it starts back up fairly easily most of the time. Occasionally, restarting seems to take a few tries but it turns over fine all the while. It has done this some at lower speed as well but it is usually upon acceleration. I have made complete trips without anything happening but these trips were of a shorter duration. The last time out, it ran fine for a 10 trip to catch bait, then when heading on out to fish, it acted up during acceleration right away. I made it back to the ramp at a slower constant throttle position. I've had a new stator installed, carbs cleaned, lower unit gears replaced, new spark plugs and a new gasline pump bulb. My mechanic wants to ride in it to be feel the symptoms for himself but it's too hard to coordinate getting on the water when it's convenient for both of us. There isn't much left to replace and he says it's probably the computer(I guess powerpack would be correct for this year of motor), which I guess are fairly expensive. Another mechanic I talked to today said he's seen this in OMC engines frequently and says it's likely the computer(powerpack). He says he found that they were developing moisture for some reason, which is why this problem is intermittent. What do you guys think? thanks
. test everything else and if all tests ok look at the pack.
