Marvel Mystery Oil fogging
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=40217
Printed Date: November-16-2024 at 10:35am
Topic: Marvel Mystery Oil fogging
Posted By: tommer12
Subject: Marvel Mystery Oil fogging
Date Posted: November-21-2016 at 6:08pm
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Hey everyone. I used to fog my nautiques with carbs with Marvel. Just dump some down the throttle body and smoke it up and shut it down. I have a new nautique with a PCM EFI. Can I still do this or is it frowned upon or mess up something? Thanks! ------------- 84 SN, 92 SNOB, 2005 SANTE 2006 SN 206 |
Replies:
Posted By: Hollywood
Date Posted: November-21-2016 at 9:05pm
| I suggest you follow the manual. |
Posted By: Bri892001
Date Posted: November-21-2016 at 11:03pm
| Do you have TBI or Port Injection? Either way, I agree, read the manual. I believe it's more harmful with the more modern, port style, injection. Aka, anything with a sensor that in an area of the intake that is designed to be dry under normal operating conditions. |
Posted By: quinner
Date Posted: November-22-2016 at 9:51am
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Really been meaning to start a thread about this very question, not sure what the manual says however have always been told exactly what Brian said, don't fog the intake on EFI. Recently a very trusted mechanic told me it is not a problem and via intake ensures valves are treated as well. So there lies the question, with EFI is it really bad to fog via the intake and why?? I will add however, just winterized mine last weekend and stuck with my usual EFI procedure, fogged via the spark plug hole using a spray. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1143" rel="nofollow - Mi Bowt |
Posted By: tommer12
Date Posted: November-22-2016 at 10:03am
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I saw another thread where some pulled the fuel filter, mixed up marvel and gas 50/50 and put it back on. Ran the boat and was done. I agree, follow the manual, but I was asking to see if anyone has seen or heard other ideas. ------------- 84 SN, 92 SNOB, 2005 SANTE 2006 SN 206 |
Posted By: 63 Skier
Date Posted: November-22-2016 at 10:40am
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I don't agree with your mechanic, the issue is just as simple as sensors don't want to be bathed in an oily mist. Once coated with oil there is nothing to clean them off, no heat, no combustion, no fuel to wash them. And on the issue of getting valves coated, I'm pretty convinced that fogging cylinders and spinning the engine over gets enough oil on valves to take care of them. It's really the mating surfaces that you care about. ------------- '63 American Skier - '98 Sport Nautique |
Posted By: Gary S
Date Posted: November-22-2016 at 11:37am
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It can be done,just does not seem worth the effort,but then again I never have had my intake covers off to see how it would be done on the PCM .I just pull the plugs instead. http://seafoamsales.com/wp-content/uploads/2016/03/HOW2_Sea-Foam-Intake-Port-GDI.pdf" rel="nofollow - Here's Sea Foams method ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: 63 Skier
Date Posted: November-22-2016 at 12:07pm
Right, so they are just saying to direct the spray to the throttle plate, beyond the MAF sensor to keep it clean. I guess that's an option if someone really really really doesn't want to pull spark plugs. I do think that sometimes people mistake the fogging purpose. While it's good to coat all metal surfaces, it's really mating surfaces that are critical. Cylinder walls and rings, valve seats and valves, are the critical points. If the inside of the intake manifold stays dry it's not like it's going to rust away on you and cause problems. ------------- '63 American Skier - '98 Sport Nautique |
Gary S wrote:Posted By: gun-driver
Date Posted: November-25-2016 at 2:12pm
Don't think I'd want to run that through my injectors!!! |
Posted By: lewy2001
Date Posted: November-25-2016 at 9:55pm
Yep most marine FI engines run a MAP (Manifold Absolute Pressure) sensor not a MAF airflow sensor. The MAP sensor is in the inlet manifold downstream of throttle plates. I would play safe and just remove plugs like David indicated. ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
Posted By: 63 Skier
Date Posted: November-26-2016 at 1:47pm
MAP, MAF, FAP, PAM, whatever you want to call your sensor!  Glad you got my point.Mark, do you change your fuel filter every year? I haven't been, was wondering what interval GT-40 people are using. ------------- '63 American Skier - '98 Sport Nautique |
Posted By: lewy2001
Date Posted: November-26-2016 at 9:59pm
The manual I thinks states annual. I have a extra inline filter between pump and low pressure pump that I change every year, The FCC filter I then replace every 100 hours. ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
Posted By: 63 Skier
Date Posted: November-26-2016 at 10:41pm
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Got it, thanks. I think I remember you mentioning that inline filter before. I'm not sure I've got 100 hours on the FCC filter but it's got to be close. I struggle to not make a mess on that one, have to find a better method. ------------- '63 American Skier - '98 Sport Nautique |