I finally got my boat back out last night with its new (2003) Johnson 4 stroke 140hp motor.I love it she runs about 35 top end I think with a different prop I would get a little faster but the old 176 2 stroke only did 44 at best.I didn't catch much but it sure was good getting out on the boat.
when I have been running for about 5 minutes at full blast on the homeward trip the engine dies, then after a couple of attempts it stars right up. but only to die again after about 15 seconds of being on the plane. Sounds to me like fuel starvation as it will run fine at about 5 knots. no alarms sounding, oil in the tank & plenty of fresh fuel.