Boat dies when hot...
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=18363
Printed Date: November-23-2024 at 6:01am
Topic: Boat dies when hot...
Posted By: paul96cc
Subject: Boat dies when hot...
Date Posted: July-05-2010 at 10:18pm
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Hi all,
I have a problem with my 96 Ski Nautique....been going on for 2 summers. Its a GT40 fuel injected engine. It seems that when it gets too hot that it dies. Heres how it happens. As long as im running it and never shut it down for very long its fine ( the engine is vented enough by air flow and it doesnt get too hot ), but if it runs for a couple hours and then gets turned off for a while... from a half hour to an hour or more and then restarted....it seems that something gets to hot under the engine cover and soon after restarting the engine sputters and dies. If I them open the cover and allow it to cool off for an hour or so...it will then start again and run fine. So Ive been trying to figure out what is getting to hot. At first I thought it might not be getting a good spark when its too hot and replaced the distributor cap. But then i started thinking it wasnt getting fuel. I just replaced the low pressure fuel pump that pulls the gas from the tank, as well as the fuel pickup assembly which means it has a new check valve back there. I still have the same problem when it gets hot. So Im left thinking its one of two things: 1. The high pressure fuel pump which im told it has but im not sure it even does. Does this engine have a high pressure fuel pump? And if so, where is it located? or 2. The ignition control module which Im told is very expensive, and im not sure where that is either. Is the ignition control mosule the big flat box on the back top side of the engine? It seems to sputter backfire and within 30 seconds die. If you try to restart same thing..sputters alot and half runs then dies...will never really start back up till it cools down. Its difficult to tell if its not getting fuel or not getting spark. Has anyone had a similar problem? If so please advise me. Also please let me know if and where there is a high pressure fuel pump and where is the ignition contol module. Thanks.... -Paul ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |
Replies:
Posted By: 79nautique
Date Posted: July-06-2010 at 10:41am
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3. RELAYS ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: tygartbf
Date Posted: July-15-2010 at 12:08pm
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I have this same exact problem on my 95 GT40. I replaced rotor, cap, plugs, plug wires, and fuel filter. Still had the same problem. I tested the fuel pressue and it was close to 40psi so no problem there.
Then, I disconnected the hose from the tank and hooked it back up and it started right up! So the next day I started it cold ran it for awhile and then came back 2 hrs later. It would not start. I disconnected the hose to the tank and put it in a 5 gal can. It started right up! I assumed then my problem is with either the antisiphon valve on the tank or the vent for the tank. Seems like I am developing a vacuum seal in the tank. Last night I replaced the antisiphon valve with just a valve without the ball in it. I will try that to see if that fixes it. I will also try to open the gas cap when it doesn't start to see if that isolates it to the tank vent. I checked out the tank vent and it seemed ok. I blew air in it with the gas cap off and felt air coming out so it is not clogged. Let me know what you find out! |
Posted By: Mikey43
Date Posted: July-15-2010 at 6:39pm
| My '93 Pro Boss throttle-body FI motor has same symptoms. However, it seems to be the fuel pump is too hot, so I pour lake water over the pump and it then starts right up. I THINK the fuel in the pump is boiling and it wont pump until it is cooled down. |
Posted By: paul96cc
Date Posted: August-06-2010 at 4:03am
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More updates....I replaced the high pressure fuel pump as well ( its in the fuel control cell, that big canister on the front of engine ). Still has same problem. So last time out we rigged some wiring so that when it dies we could bypass the electric system and run the high pressure pump right off the battery. Yep it died, we bypassed and ran the high pressure pump right off the battery. It started back up and ran fine for the rest of the day....in the heat on a very hot day. So now im left thinking it is the fuel control cell relays ( which i replaced a year ago when this problem started ), or something in the wiring getting power to the high pressure pump. I also have rigged a jumper that will plug in instead of the relay, so the next time it dies im going to remove the relay and plug in the jumper and see if it runs. If that doesnt work then the battery bypass to the fuel pump is still there and ill plug that in and see if it runs.
In the mean time i have two new relays ordered that should be here tommorow, as well as a new ignition coil ( several people have said it could be the coil and its fairly cheap so wtf im replacing it too ). I can tell you this ..... Im sick of it. The only reason im still messing with it is 1: It doesnt have the problem if its not under load...so the dealer has told me they doubt they can duplicate the problem. And 2: I cant sell it this way, knowing it will break down any time its hot on the next guy. Ill say this though, Im way ready to sell it or trade it in on a boat that runs. And after this experience...if I do trade it in I wouldnt be trading it in on another Correct Craft. Id buy some other competition boat. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |
Posted By: TRBenj
Date Posted: August-06-2010 at 12:46pm
You realize that your boat is 14 years old, right? All boats need some degree of maintenance, even new ones. If you have had a mostly trouble free boat, then I would be thankful for the good experience if I were you. You could very well be fighting a dirty or corroded connection (at the relay or pump), which is pretty minor problem- especially considering that 1996 was only the 2nd year that CC/PCM offered the GT40 multiport EFI engine. If that turns out to be the case Im not sure you could consider that to be a design flaw. Do a little searching elsewhere and you may realize that other comp boats from that era had much more significant issues compared to what youre fighting here. I would not be so quick to sell Correct Craft down the river. ------------- |
paul96cc wrote:Posted By: paul96cc
Date Posted: August-06-2010 at 3:12pm
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Yes Im probably being hard on correct craft. I think what im really dissapointed in is the dealer. I was really told in not so many words....dont bother bringing it in because we wont be able to fix it. So im left on my own and Im not a mechanical type. Thats why Ive had the problem for 2 years. My friend that is a mechanic is helping me now and its the only reason there is any progress. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |
Posted By: kapla
Date Posted: August-06-2010 at 3:18pm
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I guess with some help from your friend and guys here..and some wrenches this problem is an easy taker.... ------------- <a href="">1992 ski nautique |
Posted By: C-Bass
Date Posted: August-06-2010 at 3:21pm
You're not the only one, there have been several instances here lately where others were less than satisfied with their dealer's support.
This is not necessarily a bad thing! It's better than them taking it in and throwing a bunch of unnecessary parts at it just to hand it back to you in the same condition with a heavy bill. Stick around here long enough and the people here will get you fixed up...more expertise here than any dealer I'm convinced. ------------- Craig 67 SN 73 SN http://www.correctcraftfan.com/diaries/details.asp?ID=6103" rel="nofollow - 99 Sport 85SN |
Posted By: 79nautique
Date Posted: August-06-2010 at 4:05pm
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typically the issue is the relays or the plastic tube within the fuel cell cracks and causes the issue. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: paul96cc
Date Posted: August-06-2010 at 5:08pm
79nautique - Thanks for this tip....I did replace the hose inside the fuel cell with the new one that came with the new high pressure pump. Also new relays are supposed to arrive today. Fyi if anyone doesnt know...i did find two online companies to get most of these parts from, and the prices are reasonable: http://www.skidim.com http://nautiqueparts.com -Paul ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |
Posted By: 79nautique
Date Posted: August-06-2010 at 5:28pm
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MyCorrectCraftparts.com is another good source and a site sponsor as well so usually we try and steer members there but all are good sources for parts. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique |
Posted By: paul96cc
Date Posted: August-08-2010 at 12:43am
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I just had a thought.....my themostat went out about 6 months ago and I put in a 170 degree thremostat I got at an auto parts store. I was looking at parts and noticed a 160 degree thermostat for sale....that is what mine should be. It used to run at around 160 degrees but now runs around 180, could that be part of my problem? Would the extra 20 degrees be enough to have problems on a hot day? Maybe have vapor lock? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |
Posted By: paul96cc
Date Posted: August-13-2010 at 2:10am
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Well....have had it out 4 times since replacing the fuel control cell relays ( again ) and the coil. No problems, but it hasnt been really hot out these past few times and thats when it tended to fail...on hot days. Also just replaced the thermostat and the fuel filter with new. Now it runs at 160 degrees again like it should. I really wonder if that non-nautique thermostat i had in it letting it run 20 degrees hotter then normal was part of the issue? I dont know but i do know its run pretty good since putting in the new coil....and the tachometer has worked perfect for the first time since ive owned the boat since putting in the new coil. So if the fuel relays got a sence from the coil to know when to be on....maybe the coil was it.
Anyway, supposed to be hot this weekend so Ill take it out and we will see if its really fixed or not. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |
Posted By: bspinne
Date Posted: August-16-2010 at 3:39am
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Paul,
Very interested to see if you had any luck with the latest fix. I have a '99 196 with the GT40 and have been having similiar problems for the past two months. Boat runs great for ~2 sets through the slalom course (~45 min) then begins to "cut-out" under load. If I let the boat "rest/cool down" for around 30 minutes it'll normally go another set w/out issue. Come back the next day and the boat repeats the same scenario. I've replaced the fuel filter and the cap and rotor. Plugs and wires are on their way. Not sure which other parts to begin replacing. I've seen a lot of posts with similiar issues but no smoking guns. -Brian |
Posted By: paul96cc
Date Posted: August-17-2010 at 4:22am
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bspinne...
Had it out saturday and gave it the test that ussually made it fail every time: 1 Nice hot day. 2. Took it out ran it for a while then turned it off for 45 minutes with the hood down. 3. Restarted and ran....ussually at this point it would fail very soon after restart ( minute or two ), it ran for 30 minutes without issue. I am tentatively thinking it is fixed. Last things replaced: Fuel control cell relays, coil, thermostat and fuel filter. Dont think it was the fuel filter but did it anyway so your left with the other 3. The thing that helped tell the story was this test my friend did. We ran it till it failed. Once it failed he had some wires that we used to jump power directly from the battery to the high pressure fuel pump ( thats the two wire plug going into the fuel cell canister in the front of the engine )....once we did that the boat started back up and ran the rest of the day ( it was a hot day too ) without issue. Makes me think the logical conclusion is it was the fuel cell relays and that is a cheap fix....12.95 per relay at the online stores mentioned...and it takes two of them. If you did the same test it should tell you if its an electrical problem or not. One warning though....once you run the fuel pump off the battery its always on....so if you turn off the boat your going to want to disconnect the wires or at least the positive wire to stop the pump from running when the boats off. I actually left these bypass wires run in the boat....that way if I get the problem again I can at least connect the bypass and get it home. Hope this helps you. If you have any other questions Im happy to share any info ive learned....you can email me at: paul.queen@yahoo.com -Paul ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=3008&sort=&pagenum=3&yrstart=1996&yrend=2000 |