Sputtering out after high speeds
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=36174
Printed Date: May-07-2024 at 11:43am
Topic: Sputtering out after high speeds
Posted By: camron18
Subject: Sputtering out after high speeds
Date Posted: May-29-2015 at 12:10pm
| I have a 1994 hydrodyne with a pcm 351. so i run it at full throttle, it tops out at about 40 ish. then i come back down to idle for a little. when i start giving it gas again it sputters out, at about 20 and cant get going faster than that. after cruising around for about 15-20 min it seems fine again and runs like normal. It seems like it might be starving for something or loosing a cylinder. its not a big deal, i just wont go full thottle anymore. skier speed seems to be just fine, and the lake is so small it take about 5 seconds to get across the lake at full thottle anyway. just want to know what is causing it. thanks |
Replies:
Posted By: phatsat67
Date Posted: May-29-2015 at 12:18pm
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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. ------------- |
Posted By: camron18
Date Posted: May-29-2015 at 12:22pm
| it was originally electronic fuel injection, but was converted to carb by the previous owner. maybe that could have something to do with it? |
Posted By: camron18
Date Posted: May-29-2015 at 1:01pm
| 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. |
Posted By: SNobsessed
Date Posted: May-29-2015 at 2:01pm
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Pictures would be valuable here. ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: camron18
Date Posted: June-15-2015 at 3:39pm
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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? |
Posted By: spiralhelix
Date Posted: June-15-2015 at 4:22pm
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Is this still the same problem that started the thread or did that resolve and this is now a different issue? Pics would definitely help. Have you checked timing? are the advance weights moving or are they stuck? After that, check the pipeline of spark from coil to plugs. Though it might be redundant to check spark from coil, pretty simple to rule it out.
how does the fuel look when squirting into the carb? was the carb brand new, rebuilt, crusty junk pulled off the shelf? |
camron18 wrote:Posted By: camron18
Date Posted: June-15-2015 at 5:27pm
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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? |
Posted By: Hollywood
Date Posted: June-15-2015 at 5:34pm
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pictures. now. ------------- |
Posted By: spiralhelix
Date Posted: June-15-2015 at 5:56pm
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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. |
Posted By: camron18
Date Posted: June-15-2015 at 6:42pm
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here are the pics! LOL every one loves pictures. it doesn't seem like there is any advance mechanism under the disturber cap. so posiably whatever advances is going bad?     |
Posted By: JoeinNY
Date Posted: June-15-2015 at 6:46pm
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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. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: spiralhelix
Date Posted: June-15-2015 at 6:47pm
| ill have to gracefully bow out here. I have no clue with that setup. but im sure someone else does. I'm intrigued though. Is that like a coil for every two plugs? |
Posted By: Hollywood
Date Posted: June-15-2015 at 6:54pm
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Yes. That goes in the garbage and a distributor gets installed. ------------- |
Posted By: camron18
Date Posted: June-15-2015 at 7:46pm
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Yeah it looks like that is exactly what it is after researching pro-tech ignition!! Thanks a lot guys! i guess ill have to toss it. any suggestions on what distributor? id really like to not spend too much. |
Posted By: Hollywood
Date Posted: June-16-2015 at 11:32am
well duh, not too many people do like to over spend but there are good better best options ------------- |
Posted By: JoeinNY
Date Posted: June-16-2015 at 11:46am
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Ebasic power shows a couple options in RH for distributors from 190-360 - you will also need a matching coil and maybe a ballast resistor depending on your choice. Don't throw away the gear on the bottom of that distributor type thingy yet until you find out if the RH options are actually available. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: Hollywood
Date Posted: June-16-2015 at 12:06pm
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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. ------------- |
Posted By: JoeinNY
Date Posted: June-16-2015 at 12:13pm
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Definitely too many epoxy fumes over this way... there probably isn't such a thing as a RH protec in any boat ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: camron18
Date Posted: June-16-2015 at 2:48pm
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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? |
Posted By: JPASS
Date Posted: June-16-2015 at 3:09pm
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you're also going to need new wires as well. I'd say spend the money and get a whole new set-up (wires, dizzy, and coil). Don't waste time with used stuff from eBay. It should cost less than $500 if you install it yourself. Skidim has a replacement kit http://www.skidim.com/prodinfo.asp?number=RK107025A" rel="nofollow - Here We also get a discount for being a CCFan member. Should help with the cost. ------------- '92 Correctcraft Ski Nautique |
Posted By: TRBenj
Date Posted: June-16-2015 at 3:45pm
Randy in ohio could probably tell us... Pretty sure he has a RH 1:1 proboss/protec in his '93 Sport. |
Posted By: Hollywood
Date Posted: June-16-2015 at 3:55pm
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Did Mullin's RH scrappy come with ProTec? I know he changed distributors after ownership. I'm guessing the 240hp RH engines got distributors http://www.correctcraftfan.com/forum/new_reply_form.asp?Quote=1&PID=264483&PN=1&TR=7" rel="nofollow - [QUOTE=SneakyPete - I have a 93 Ski Nautique Standard with a RH 351 and the 1:1 tranny. It does not have a protec. ------------- |
Posted By: Hollywood
Date Posted: June-16-2015 at 4:00pm
Randy has a distributor. ------------- |
Posted By: Bri892001
Date Posted: June-16-2015 at 4:05pm
| Nope, mine came with a two wire Prestolite Electronic distributor. |
Posted By: camron18
Date Posted: June-16-2015 at 7:48pm
| happened found a guy parting out a 1993 pcm in my area on craigslist!! the whole shebang for $100! that should work right? |
Posted By: TRBenj
Date Posted: June-16-2015 at 9:25pm
| Probably not. It'll either have the same problematic ignition system or one with a gear meant for an engine with the opposite rotation as yours. Most likely the former, in which case I wouldn't pay $5 for it. |
Posted By: camron18
Date Posted: June-17-2015 at 12:18am
| 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 |
Posted By: shierh
Date Posted: June-17-2015 at 4:21pm
| Also sounds like water in the gas. would rule that out as well. |
Posted By: xarmypilot
Date Posted: June-17-2015 at 4:59pm
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. ------------- '87 SN 2001 http://mbbw.com/WIP/DSCN9620.JPG" rel="nofollow - '68 Chris~Craft Grand Prix (Past family boat) '72 Checkmate Mx16 (Past family boat) "Speed is life, altitude is life insurance" |
Posted By: camron18
Date Posted: June-17-2015 at 5:46pm
|
After reading about protec problems, and how common they are. I'm pretty convinced that is it, especially because it only does it sometimes. I will look into that tho. Thank you I think I'm going to buy the used kit from Craigslist, any reason I. Shouldn't? |
Posted By: spiralhelix
Date Posted: June-17-2015 at 6:20pm
| the generic answer is that you would most likely be buying a used item and therefore buying something with a shortened life span. But that is also relative as used items could still last forever (or outlive the thing they are going into). You won't know until you do it. At least with a new item, there is a greater potential to rectify a problem on someone else's dime. To me, I'd take the risk from CL at the price you quoted above. If you get a year out of it and it fails...you aren't out that much. If a used one was only a couple hundred less than new...i'd get new. |
Posted By: camron18
Date Posted: June-17-2015 at 6:26pm
| Thanks! That's what I was thinking. Save a couple hundred and go with the risk. He says it works great and all boxed up ready for me already! |
Posted By: camron18
Date Posted: June-19-2015 at 5:38pm
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Well I think I may have found the problem. Today I took the dyne out. Whipped around a couple laps, it then began to sputter at 2500 rpm in limp mode. I pulled the wire off of the protec oil switch and water temp switch. Shut the engine off to reset the computer. Fired it back up and whipped around the lake again. Never went into limp mode. Ran perfect the whole time. Plugged back in the water switch and it ran perfect still plugged in the oil switch and it still ran perfect. It seemed to idle and run better overall with the oil switch dissconected. The post on the oil switch was very loose and felt broke. I think that was the problem, for now anyways. I'll order a new switch from skidim and see what happens. Save 500 bucks if it goes well. |
Posted By: Bri892001
Date Posted: June-19-2015 at 6:00pm
| Cool! Let us know if that fixes it. |
Posted By: Jonny Quest
Date Posted: June-21-2015 at 12:22am
+1 on a ProTech system failing. Time for a new Davis Unified Ignition HEI distributor set-up. ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |