2001 Nautique 196 hunting and stalling.
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=43212
Printed Date: October-06-2024 at 2:26pm
Topic: 2001 Nautique 196 hunting and stalling.
Posted By: macey
Subject: 2001 Nautique 196 hunting and stalling.
Date Posted: July-22-2018 at 11:18am
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New to the forum so would like to wish everyone best wishes from over in Ireland. I hope I am posting this in the correct place because it may end up quite a long post so apologies in advance. After many years of sports boat ownership I finally purchased a 2001 Nautique 196 last year. Boat was a bit of a project, new upholstery required, general tidying and had been inactive for a couple of years. I knew a little of the history of the boat and the issue I am having has probably existed for some time but now we are at the stage where the boat will not run for much more than 10 minutes. Generally fires up first turn and runs smoothly, or at least to my uneducated ear. The problem begin after around ten minutes or when engine generates heat. I am not sure whether the issue relates to electrical, fuel or heat. Engine would pull fine in the water, would lift a skiier no problem but starts hunting and eventually stalls. Will sometimes start again but will get to the point where it is very difficult to start. Will generally start if left for a while. I have found several references to problem similar to mine so I have done some things which would seem to cause the above problem. I have checked breather to fuel tank, condition of pipework to and from fuel tank, strainer on fuel pick up, added fresh petrol, checked strainer in LPFP, applied power directly to LPFP (seems ok but have not actually calculated rate of flow), changed FCC filter, checked pressure when boat is running at Schrader valve on FCC, not quite 40PSI but close. Fuel pressure does not drop noticeably when engine is hunting or eventually stalls. Pressure seems to increase slightly if I look at pressure gauge several minutes later. I have changed relays and the housings that connect the relays as these had very poor looking connections. I have changed the spark plugs and leads. The 60A main breaker was stuck so I replaced that. The 12.5 and 15A breakers seem ok but that is just visual and a wiggle. I have checked several earth cables and all seem ok. I have replaced the coil and the alternator. I have replaced the battery and fitted new terminals. I have not yet removed wiring and checked connections at the ECU. I have read several posts with similar symptoms to mine but, as I live in Ireland, access to even fairly basic parts is quite limited. I would really appreciate if someone could suggest what to try next and possibly point out anything obvious or simple I may have missed. The original owner did have some issue with stalling but it is not as bad as I am experiencing. He would have used the boat for hours before any issue and the boat would have fired up a few minutes later and been fine again. There have been three distributor caps fitted over the years and the current one looks brand new so I did not replace that. I did mention heat earlier in the post. I have fitted a new impeller but the constant running from a hose has probably done it no favours. The exhaust risers get quite hot, I have no idea how warm they should be but I do have an infra red probe to check. Water coming out exhaust is quite steamy. Oil change done and no signs of any moisture in oil. I am currently waiting on a simple fault code reader coming across from America but will be a few days before I see that. I have no problems throwing some parts at this, it is now 17 years old and many components will be past their best. My main issue is waiting at each stage of the diagnosis for parts to arrive, get across to boat, get them fitted and test. Summer is wearing on and nothing I have done has had any effect. I may have forgotten some things I have done/checked but this probably covers most of it. Many thanks in advance for any help. Best Wishes, Neil. |
Replies:
Posted By: SNobsessed
Date Posted: July-22-2018 at 11:36am
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If you can isolate it to ignition vs. fuel, then you can focus on 1 path. Have you tried manually squirting gas into intake when it quits? Does it have spark when it quits? ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: sport1999
Date Posted: July-22-2018 at 11:44am
| I guess this is a gt40 engine? Running on gas? |
Posted By: macey
Date Posted: July-22-2018 at 11:48am
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Hello, thank you both for the prompt responses. It is running on gas as opposed to LPG. When you suggest spraying fuel directly when it starts hunting and wanting to stall do you suggest removing the flame arrestor and introducing the fuel there? Thanks, Neil. |
Posted By: Jonny Quest
Date Posted: July-22-2018 at 1:13pm
Correct. Introducing petrol (gas or gasoline) into the intake manifold can help isolate the problem. If the engine will run with petrol squirted into the intake manifold, but won't run properly without the added petrol, then you have some valuable information. I like to use a spray bottle with some type of atomizer rather than just a stream of raw fuel. Just use caution and a little common sense here. With the flame arrestor removed, a back-fire while holding a bottle of petrol nearby is not a good scenario. JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
macey wrote:Posted By: macey
Date Posted: July-22-2018 at 2:22pm
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Many thanks to all, will try this and come back, will probably be next weekend before I can get back to boat. Any other suggestions in the meantime would be appreciated. Won't take long to try this so what would be the next step if engine picks up when fuel introduced. I believe it is a fuelling issue but this remains to be seen. Cheers, Neil. |
Posted By: DVskier
Date Posted: July-22-2018 at 2:34pm
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Hi Macey, I had a 97 SN with the GT 40 engine. It had a similar issue and it turned out to be a 1.5 inch clear plastic hose in the Fuel Control Cell (FCC). The hose develops a split that opens up as the engine heat builds, thus causing the problem. I recommend replacing the hose, Discount Inboard Marine should have these in stock and Vince can provide you with one. See www.skidim.com. Good luck! |
Posted By: 8122pbrainard
Date Posted: July-22-2018 at 2:52pm
https://www.skidim.com/HOSE-KIT-FCC-H_P-PUMP/productinfo/RK045098/" rel="nofollow - Here's the hose but Skidim says it's for a 1996 to 1998 ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: macey
Date Posted: July-22-2018 at 3:24pm
| Hi Pete, have seen a few posts with reference to this part. Did take a quick look at this when changing the filter, it did look ok but I didn't bend it too much to find cracking. Would deterioration of this pipe be in keeping with my fault? |
Posted By: macey
Date Posted: July-22-2018 at 3:33pm
| Hi DVskier, thanks for reply. All assistance greatly appreciated. |
Posted By: DVskier
Date Posted: July-22-2018 at 4:22pm
| No worries, that hose issue plagued me for months. Three different dealers couldn't find the problem so I traded for a 2004 SN, very happy with it. |
Posted By: DVskier
Date Posted: July-22-2018 at 4:31pm
| Correct Pete, however since he doesn't know the history of the power plant perhaps the FCC has been replaced. Who knows? Thought is was worth mentioning. |