Sputtering out after high speeds

Is it points or electronic ignition?

My finger would point towards the coil or the ignition pickup (if it is electronic) getting hot from the higher spark rate then cooling back down after it runs lower rpms for a while.

so to answer your question, im not really sure. there is a distributor, so i guess points. but the spark plugs don't plug into the distributor, there is a wire harness that attaches to the distributor that runs to some kind of coil maybe? and then the spark plugs attach to that.

so this weekend we took the boat out. after wakeboarding for a few hours we brought the boat back to the dock to empty the fat sacs for skiing. took about 30 min or so. after about an hour we got back in the boat for some slalom. after 15 more min i pulled my friend out of the water just fine and was getting up to speed, at about 25 mph it would just misfire and wouldn't let me go any faster. this happened every time we tried to accelerate past 25. it will hold at 25 and run perfectly normally, but anything past 25 it misses badly, i am new to slalom and it was my first time out for the season, so i just wanted to practice getting up, after a few attempts i got up and the boat ran perfect i got a few passes in at 36 mph, we swapped skiers and we got a few more passes in, and once again out of no where it started missing and we went back down to 25. ill try to get some pics today. but it seems to be getting worse.

any suggestions?

electrical?

Fuel?

Spark plugs?

same issue that started this thread. it seems to be happening more often now and i would really like to fix it.

carb was brand new as far as i know. ill check how fuel looks, i think im just going to go ahead and change out spark plugs

what do you mean by check the pipeline of spark fom coil to plugs?

lol HW.

pipeline: I just mean, test the spark coming from the coil, then test the spark from each plug wire, then test the plugs themselves. The spark should be the same along each path. For instance, when I was testing my ignition, we did each wire, then the plug on the wire and when I got to #5 wire it was similar, but the plug had a different spark. replaced all the plugs and was back on track.

Yeah that's a protec setup, its going bad and very likely the cause of your issue.   A new ignition system will probably be your best bet. Do a site search on protec ignition failure or replacement to learn more.

Yes. That goes in the garbage and a distributor gets installed.

camron18 wrote: id really like to not spend too much.

well duh, not too many people do like to over spend but there are good better best options

I have no reason to believe his 94 Hydrodyne is not a LH engine.

Post up the engine model number. Starts with a P. There should be a black and white metal tag bolted on the top of the engine.

what i ment was the good option is probably all i need.

any reason why a used one on ebay would be a bad idea?

JoeinNY wrote: Definitely too many epoxy fumes over this way... there probably isn't such a thing as a RH protec in any boat

Randy in ohio could probably tell us... Pretty sure he has a RH 1:1 proboss/protec in his '93 Sport.

Randy has a distributor.

happened found a guy parting out a 1993 pcm in my area on craigslist!! the whole shebang for $100! that should work right?

It is not the protec system, and it is left handed, same as mine. Normal distributor with coil and ballast resistor plug wires and wiring harness

shierh wrote: Also sounds like water in the gas. would rule that out as well.

It's worth looking into, but since it sounds like it runs normally at idle and there's no indication of white smoke, I'd say the likely culprits would be ignition, fuel or fuel\air mixture.