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Service truck operators

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Mike

11-20-2000 12:49:25




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How do you combat icing up carburators on your small engines? My compressor has a 10 hp ind kohler on it and in the 25-35* weather lately, it wants to ice up the carb after running less than a minute. The only real fix is to put the salamander on it to warm it up. Once it is warm, it runs fine, apparently it generates enough heat to keep itself warm. Once it gets down to 0-10* the problem will solve itself as dry air won't cary the moisture to frost it up. Mike

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Fred OH

11-22-2000 08:07:37




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 Re: service truck operators in reply to Mike, 11-20-2000 12:49:25  
Put a plastic liner down the throat of the carb so that the air doesn't touch the metal part of the carburetor on it's way in. (like a styrofoam cup) If this works, let me know cause I got one just like it. (grin) L8R----Fred OH



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BillD

11-21-2000 14:12:57




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 Re: service truck operators in reply to Mike, 11-20-2000 12:49:25  
Mike I was looking at an onan commercial engine that belongs to a local fire dept. did not realize what I was looking at until I read your post This engine had an air preheater on the carb air inlet I would suspect that you might find something like that at a motor home dealer



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BillD

11-21-2000 14:12:35




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 Re: service truck operators in reply to Mike, 11-20-2000 12:49:25  
Mike I was looking at an onan commercial engine that belongs to a local fire dept. did not realize what I was looking at until I read your post This engine had an air preheater on the carb air inlet I would suspect that you might find something like that at a motor home dealer



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Mike

11-21-2000 14:37:05




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 Re: Re: service truck operators in reply to BillD, 11-21-2000 14:12:35  
last winter I carried a piece of 6" flexible black culvert w/ me. I held it over the exhaust and blew it into the carb for a couple of minutes. Pretty low tech, yet worked for me. I was looking for a more permanent solution



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big fred

11-21-2000 10:26:53




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 Re: service truck operators in reply to Mike, 11-20-2000 12:49:25  
It's that danged Venturi principle that does it. Unfortunately you only have three options. Live with it, dry the air or heat the carburetor or intake air. I don't know if there is such a thing as a 12 volt heat tape (like you would use for keeping pipes from freezing, but if you could find one, you might be able to use it to keep the carb warm.



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T_Bone

11-21-2000 17:36:36




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 Re: Re: service truck operators in reply to big fred, 11-21-2000 10:26:53  
Hi big Fred, there you go. They make 12v 1/2" round by 6" heating rod for RV refrigerators and it cost about $7. That would do it!

T_Bone



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Greg S

11-21-2000 10:17:05




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 Re: service truck operators in reply to Mike, 11-20-2000 12:49:25  
Mike,
If you still have the problem of carb icing after you clean out the tank, consider running the carb settings a little on the rich side. Maybe building a shroud over the engine would allow the air to warm up a bit before being pulled into the air cleaner. My corvette with holly carb does this until the underhood temp gets warm.



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T_Bone

11-21-2000 09:51:44




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 Re: service truck operators in reply to Mike, 11-20-2000 12:49:25  
Hi Mike, sounds like water in the fuel tank and carb. Clean the tank/fuel lines out and rebuild the carb and your problem will go away.

T_Bone



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Mike

11-21-2000 10:11:50




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 Re: Re: service truck operators in reply to T_Bone, 11-21-2000 09:51:44  
Been there, done that. You can watch the carb turn white as it runs, it is freezing up from the moisture in the air. Have you ever pulled the valve out of a tire on a cold day and watchhed the valve turn white then frost up? Same principle only in reverse.



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Greg S

11-21-2000 10:29:42




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 Re: Re: Re: service truck operators in reply to Mike, 11-21-2000 10:11:50  
Or on second thought you could supply Mrs. Red with the chili fixins and hire Red to ride along with you and keep the air warm (side benefit would be the fuel savings for the compressor)



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Greg S

11-21-2000 10:25:05




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 Re: Re: Re: service truck operators in reply to Mike, 11-21-2000 10:11:50  
Mike,
The reason for this is called the venturi effect. Basically the air flow through the carb venturi causes the air temp to drop and any moisture in the air will condense out and freeze on the walls of the carb, blocking off the fuel openings in the throat of the carb. Thats why airplanes have carb heaters to warm up the air before this happens.



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Mike

11-21-2000 11:46:42




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 Re: Re: Re: Re: service truck operators in reply to Greg S, 11-21-2000 10:25:05  
So if I understand you right I have to either A) hire the chilli eatin Red to ride w/ me or, B)replace my kohler with an airplane engine? Hmmm... anyone know a web page you can buy airplanes on?



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Greg S

11-21-2000 11:53:10




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 Re: Re: Re: Re: Re: service truck operators in reply to Mike, 11-21-2000 11:46:42  
If Gore gets elected and cuts back the military anymore, you can go to the Air Force's web site and get a heck of a deal on F-16s or C-5As.



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T_Bone

11-21-2000 17:33:13




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 Re: Re: Re: Re: Re: Re: service truck operators in reply to Greg S, 11-21-2000 11:53:10  
Hi Mike, Then try some Heat additive and see if that helps or alcohol. It's cheaper than the F-16 and don't smell as bad as Red's second hand chille. :)

T_Bone



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