Mystery White
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=38280
Printed Date: October-07-2024 at 12:25pm
Topic: Mystery White
Posted By: AussieRy
Subject: Mystery White
Date Posted: March-17-2016 at 3:26pm
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Hey Guys - For those that remember my struggles with my less than perfect engine here is an update. My 1990 Ski Nautique is now up and running, I have compression back in all cylinders and I have been able to put a whopping 5 hours on the engine. I still have one pesky issue that I can't seem to kick - white smoke. It is present most when on a hard run, or after a hard run. Smells a little gassy, but looks like steam. Here is some basic info: - runs and idles great - Starts straight up - Fuel pump not discharging into clear tube - new exhaust manifolds - complete set - good compression - drained old gas and replaced - new impeller - choke operating fine - timing good (electronic ignition upgrade) - new plugs (not leads though) - original intake manifold - temp 155-170 - Oil Pressure 55 Like i said, it runs great so Im not really concerned, but I know there is something in there that needs attention. Could there be a leak in the intake manifold somewhere causing the smoke? Im replacing the T-stat tomorrow to be sure it is OK, but temps have been fine while running. Any other thoughts? For those that are interested here are some links to a WOT run and IDLE immediately after the run. WOT: https://youtu.be/Uq7zklGRzho IDLE: https://youtu.be/VjQBpd8_6nE Thanks in advance guys. Pic of boat below.  ------------- 1990 Ski Nautique |
Replies:
Posted By: 8122pbrainard
Date Posted: March-17-2016 at 3:45pm
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Ryan, Looks normal to me. I don't feel you have anything to worry about concerning the white vapor. You need to factor in the dew point of the ambient ------------- /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: AussieRy
Date Posted: March-17-2016 at 4:23pm
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Thanks for the quick reply. My only concern with it is the strong smell associated with the mist/smoke. But it sure does run nice. ------------- 1990 Ski Nautique |
Posted By: JPASS
Date Posted: March-17-2016 at 4:25pm
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Our '92 did the same thing. Seems normal to me. Just steam. ------------- '92 Correctcraft Ski Nautique |
Posted By: AussieRy
Date Posted: March-17-2016 at 4:35pm
And exhale..... thanks for the vid. Makes me feel a little better about where I'm at. Is your engine stock? looked to be moving along real nice! ------------- 1990 Ski Nautique |
JPASS wrote:Posted By: GlassSeeker
Date Posted: March-17-2016 at 4:52pm
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What's the water temp of the lake? ------------- This is the life |
Posted By: Hollywood
Date Posted: March-17-2016 at 5:03pm
| that vaping is all the rage rn |
Posted By: Mountain Man
Date Posted: March-17-2016 at 5:10pm
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White smoke (steam) can be an indicator of moisture seepage into one or more cylinders. The moisture is being converted to steam on the combustion stroke and then expelled with the engine exhaust. If this is what you are concerned about - pull the spark plugs and look at the tips. If one or more plug tips are different in appearance of coloration from the others you will know where to look (which cylinder or general location of a head gasket leak). Spark plugs if exposed to steam cleaning will look especially clean compared to the normal carbon residue found on plugs. Good Luck! |
Posted By: AussieRy
Date Posted: March-17-2016 at 5:30pm
@ 60-62 ------------- 1990 Ski Nautique |
Posted By: quinner
Date Posted: March-17-2016 at 5:31pm
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White Smoke Matters ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1143" rel="nofollow - Mi Bowt |
Posted By: AussieRy
Date Posted: March-17-2016 at 5:31pm
Thanks - I pulled the plugs. All look pretty normal, but I'm not an engine whisperer, so will inspect again after I get some more hours on it. Thanks for the input. ------------- 1990 Ski Nautique |
Posted By: AussieRy
Date Posted: March-17-2016 at 5:32pm
 ------------- 1990 Ski Nautique |
Posted By: skutsch
Date Posted: March-17-2016 at 5:47pm
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Yep, I agree normal. Especially if you are running in cold water and air. I see a lot of that when we are skiing in the cold. ------------- Our http://www.correctcraftfan.com/diaries/details.asp?ID=4669" rel="nofollow - 98 Sport Nautique My Dad's 63 Ski N |
Posted By: Orlando76
Date Posted: March-17-2016 at 6:04pm
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I see it here when the atmospheric conditions are right. Dads motor has been doing it 41 years now.... Maybe there could be a problem. ------------- Please support The Cystic Fibrosis Foundation 1976 Ski Nautique 351 Escort 1993 Ski Nautique purple and black 351 HO PCM |
Posted By: 74Wind
Date Posted: March-17-2016 at 6:33pm
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Yup. Although at first thought JPASS video looked odd until realized 92 must be single exhaust. .... ------------- 1974 Southwind 18 1975 Century Mark II |
Posted By: 63 Skier
Date Posted: March-17-2016 at 7:38pm
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Mine does the same thing, looks exactly like that, in cooler water temps. My plugs all look normal. That engine sounds pretty healthy, enjoy the fun! ------------- '63 American Skier - '98 Sport Nautique |
Posted By: 8122pbrainard
Date Posted: March-17-2016 at 8:11pm
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Ryan, You mentioned you got the compression back. Did you do anything besides just run it? Regarding the white water vapor, did you own a boat before the CC purchase? If so, was it an I/O with underwater exhaust? ------------- /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: GlassSeeker
Date Posted: March-17-2016 at 8:51pm
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60 62...not very cold...usually colder water to get the steam cloud ...but it did seem to go away so...just watch it and have fun ------------- This is the life |
Posted By: AussieRy
Date Posted: March-18-2016 at 2:52am
Nope, just ran it. It was sitting for 5yrs prior. California. Had low compression in #6 but once run it came back. Never owned a boat before, but my mate has an 89 Nautique which we run often. More than anything it is the smell that seems off. Runs great though, so might just do that and forget about it. ------------- 1990 Ski Nautique |
Posted By: 8122pbrainard
Date Posted: March-18-2016 at 6:44am
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Ryan, The rich exhaust smell may indicate a carb rebuild is due. Keep running the boat and see what happens before digging into it. ------------- /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: JPASS
Date Posted: March-18-2016 at 8:34am
We sold her last August, but she was stock with roughly 1800 hours on her. Motor and trans checked out perfect when we traded her in. While you seemed to have more steam then I did at lower speeds, I still think you're OK. We didn't have any odd smells associated with any of the steam. Wonder if any of these smells are related to it sitting for 5 years? May have to rebuild the carb down the road. Our new boat steams a bit with the colder temps as well. ------------- '92 Correctcraft Ski Nautique |
Posted By: backfoot100
Date Posted: March-18-2016 at 9:31am
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I agree with everyone else, the steam is normal. I see it all the time. When you pulled the plugs what color were they? White, tan or black? Could very well be running a little rich and due for a rebuild like suggested. Also double and triple check the engine compartment while it's running to make sure you have no fuel leaks anywhere. Check everything from the tank to the carb. ------------- When people run down to the lake to see what's making that noise, you've succeeded. Eddie |
Posted By: AussieRy
Date Posted: March-18-2016 at 10:22am
I already have a new carb on it. The ild one was toast when I got it. ------------- 1990 Ski Nautique |
Posted By: 8122pbrainard
Date Posted: March-18-2016 at 10:26am
How was the new carb set up? Just out of the box and bolted on? Hopefully it's a marine.  ------------- /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: Hollywood
Date Posted: March-18-2016 at 10:38am
| transom nice and clean or do you get soot build up? |
Posted By: AussieRy
Date Posted: March-18-2016 at 10:38am
Out of the box. Certainly a marine. Idle adjust done only. ------------- 1990 Ski Nautique |
Posted By: AussieRy
Date Posted: March-18-2016 at 11:47am
Yeah, it's clean. I wonder if the new exhaust manifold and risers etc are burning off, creating a smell unrelated to the steam. ------------- 1990 Ski Nautique |