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Engines smoking but running well

GAS engine, transmission and generator repair and maintenance discussion forum.
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waybomb
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Posts: 1590
Joined: February 5th, 2013, 9:24 pm
Vessel Info: 1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glaspar / 1969 Johnson Electrmatic 85
1964 Barron Flat bottom drag boat
A couple of dinghies
Location: Saint Joseph and Trenton, MI
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Re: Engines smoking but running well

Postby waybomb » June 14th, 2013, 9:30 am

Is the steam a little cloud that hangs around the back of the transom, or is it a big cloud, like, above the gunwale high?
Thanks
Fred
1964 Barron Flatbottom with BBC Chevy
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572s
http://s4.beta.photobucket.com/user/waybomb/library/
Past - 1988 2807, 1989 4207 Aft

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Seif911
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Vessel Info: 1977 Carver Mariner 33'
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Re: Engines smoking but running well

Postby Seif911 » June 14th, 2013, 9:52 am

The steam/smoke was higher than the transom. It was big enough that we had to close the back doors to keep it out of the cabin. It did not seem to hang around behind us while we were driving, but yet it did have a distinct 'fuely' smell. Got me. I will pay better attention to it next time we go out.

Maybe it is just too much unburned gas? If that is the case, it just may be the carb/plug problem you previously described. Maybe it is dropping to much un-atomized gas in the engines? Maybe the carbs need a cleaning since they sat for 5 yrs? That could possibly affect both engines since they sat the same amount of time.

To that point...I know the blowers are working but did not actually check the flow of air. Possible problem...lack of air?

The distributor does not look original. It is a pretty 'Mallory' distributor and very clean inside. I doubt this would be a problem. The wires are also all brand new. I guess I should maybe change the plugs out.

We'll see if the new fuel filters help at all. I suspect not.

This is a good one! I appreciate all of the thoughts and hopefully we'll figure this one out.
Thanks,
Steve

22' Godfrey Hurricane Fun Deck, Fiberglass hull, 175 HP, Deck boat
24' Chrysler Cruiseliner III (Lonestar), 120 HP, Aluminum Hull, Cabin, 1968
33' Carver Mariner, fiberglass hull, 520 HP, Yacht, 1977
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United States of America
waybomb
CYO Moderator
CYO Moderator
Posts: 1590
Joined: February 5th, 2013, 9:24 pm
Vessel Info: 1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glaspar / 1969 Johnson Electrmatic 85
1964 Barron Flat bottom drag boat
A couple of dinghies
Location: Saint Joseph and Trenton, MI
Has thanked: 27 times
Been thanked: 190 times

Re: Engines smoking but running well

Postby waybomb » June 14th, 2013, 10:04 am

That much stream concerns me.

Exhaust from a boat shouldn't smell much different from automotive, just a little wet.

If you are smelling gas, id say buy two carb kits and rebuild them.

Have you done quadrajets before?
Thanks
Fred
1964 Barron Flatbottom with BBC Chevy
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572s
http://s4.beta.photobucket.com/user/waybomb/library/
Past - 1988 2807, 1989 4207 Aft
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Topic author
Seif911
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Re: Engines smoking but running well

Postby Seif911 » June 14th, 2013, 12:45 pm

I haven't done 4 barrel carbs since I was a kid, but I have done many carb rebuilds and I am definitely not afraid of them. I will see if there is some sort of spec on the carb this weekend so I can find the proper rebuild kit. I am kind of thinking the same thing.
Thanks,
Steve

22' Godfrey Hurricane Fun Deck, Fiberglass hull, 175 HP, Deck boat
24' Chrysler Cruiseliner III (Lonestar), 120 HP, Aluminum Hull, Cabin, 1968
33' Carver Mariner, fiberglass hull, 520 HP, Yacht, 1977
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Re: Engines smoking but running well

Postby CYO Admin » June 15th, 2013, 7:49 am

When you pull the plugs look for signs of rust. Given the age of the boat and the lack of service history, it might be worth pulling the manifolds and risers for inspection. I am assuming these are not closed cooled engines?
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United States of America
waybomb
CYO Moderator
CYO Moderator
Posts: 1590
Joined: February 5th, 2013, 9:24 pm
Vessel Info: 1987 3697 Carver Mariner
1988 Cougar 46 Kevlar Vee offshore
1969 15' Glaspar / 1969 Johnson Electrmatic 85
1964 Barron Flat bottom drag boat
A couple of dinghies
Location: Saint Joseph and Trenton, MI
Has thanked: 27 times
Been thanked: 190 times

Re: Engines smoking but running well

Postby waybomb » June 15th, 2013, 9:38 am

If you have closed cooling filled with antifreeze, if you have a coolant leak into the exhaust, it will smell sweet.
Thanks
Fred
1964 Barron Flatbottom with BBC Chevy
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572s
http://s4.beta.photobucket.com/user/waybomb/library/
Past - 1988 2807, 1989 4207 Aft
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Topic author
Seif911
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Posts: 233
Joined: April 11th, 2013, 6:46 am
Vessel Info: 1977 Carver Mariner 33'
Location: Sheboygan, WI
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Re: Engines smoking but running well

Postby Seif911 » June 15th, 2013, 9:52 am

Nope...good ole Lake Michigan water! I will be driving it today or tomorrow at the latest. I'll see if I can find any more details.
Thanks,
Steve

22' Godfrey Hurricane Fun Deck, Fiberglass hull, 175 HP, Deck boat
24' Chrysler Cruiseliner III (Lonestar), 120 HP, Aluminum Hull, Cabin, 1968
33' Carver Mariner, fiberglass hull, 520 HP, Yacht, 1977
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Topic author
Seif911
Captain
Captain
Posts: 233
Joined: April 11th, 2013, 6:46 am
Vessel Info: 1977 Carver Mariner 33'
Location: Sheboygan, WI
Been thanked: 2 times

Re: Engines smoking but running well

Postby Seif911 » June 21st, 2013, 8:50 am

Good Morning All,
So I have taken the boat out quite a few times now. The white smoke comes from both engines. It really has no steam mist at all and I am pretty sure it is white smoke. It seems to be getting a little bit smaller. It does not smell like oil, maybe a little like gas. I have a feeling it is the very bad gas I have. I am just too going to keep running it with a close eye on it.
Thanks,
Steve

22' Godfrey Hurricane Fun Deck, Fiberglass hull, 175 HP, Deck boat
24' Chrysler Cruiseliner III (Lonestar), 120 HP, Aluminum Hull, Cabin, 1968
33' Carver Mariner, fiberglass hull, 520 HP, Yacht, 1977
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aa9nn
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Joined: June 21st, 2013, 2:29 pm
Vessel Info: 1992 Carver 538 Montego
Twin 454 Crusaders
Updated Electronics
I'm second owner!
Location: South Haven Michigan

Re: Engines smoking but running well

Postby aa9nn » June 21st, 2013, 6:20 pm

Hello!!
Took my boat out for a ride as well this week, white smoke/steam as well equal on both sides (pretty light) But Lake Michigan water temp is 53 degrees and air temp was about 70! looks pretty normal as cold water,hotter exhaust. I had put in about 60 gallons of fresh gas and Lucas (which helps)
Temp at 180 on both 454 Crusaders with CC, Oil at 40, all and all for a 20 year old boat and engines not all bad....also FYI GPH was about 14! :)

Boat safe ! Boat Often!!

Jim
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Topic author
Seif911
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Posts: 233
Joined: April 11th, 2013, 6:46 am
Vessel Info: 1977 Carver Mariner 33'
Location: Sheboygan, WI
Been thanked: 2 times

Re: Engines smoking but running well

Postby Seif911 » June 21st, 2013, 7:07 pm

Hi Jim,
Well that is good to hear. It is definitely some cold water. I like the GPH. Was that an aftermarket addition to read that?
Thanks,
Steve

22' Godfrey Hurricane Fun Deck, Fiberglass hull, 175 HP, Deck boat
24' Chrysler Cruiseliner III (Lonestar), 120 HP, Aluminum Hull, Cabin, 1968
33' Carver Mariner, fiberglass hull, 520 HP, Yacht, 1977

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