gas ih 560 carb keeps freezing up

[peter29]

im plowing snow and the carb freezes up where it bolts up to manifold any ideas on how to fix this problem besides move to a 90 degeree world thanks
 

[heavyhaulertoo]

There should be a hole in the exhaust man. in the bottom corner, take a 16 penny nail to open it up, I know redneck.
 

[peter29]

thanks do I have to remove carb?
 

[old]

ALL carbs ice up and it is part of how they work. If the did not your engine would not run it is due to the atomizing of the fuel that in turn cause the manifold area to get cold and it is just normal operation of a carb and you old cars and trucks do the same thing. If it bugs you don't look at it. Yes some time for a bit the engine will not run as well but it should clear up once the engine warms up more. Also opening up the main jet a tad bit helps. So as I said it is normal and nothing to worry about
 

[peter29]

stalled out wont run unless you pull choke out after it dies. once you wait about 15 min. it will run for about 10 then it starts all over again.
 

[Stuart]

Your so far off its not even funny.
 

[old]

BULL stupid
 

[Stuart]

Out of all the old gas tractors I have, none have the carbs ice up on them.
 

[old]

Open the main jet up just a little bit till you find the spot that works. When it is cold out some times you need a richer mix to run well. You can also make a side cover to help hold in heat. Some people make a cover from foil so as to help hold more heat in the area. That is why on the older cars they had a tube that went from the exhaust manifold into the air cleaner intake to pull the warm air into the carb so that carb icing did not happen but on a tractor doing that would not be easy
 

[peter29]

it is the first year for this problem never happened before carb has not been touched in years. the tractor plowed snow last year with no problems I dont get it.
 

[old]

You have either been lucky of you just do not stop to look. It is a fact of life and how a carb works that causes the manifold to get real cool. Ya it does not happen all the time and few people ever see it happen. Start a tractor then go over and hold your hand close to the top of the carb where it bolts to the manifold and you will find that it is very cool and if weather conditions are right if will frost up. On many engines you will never notice a problem but it can be it things so happen to be just right. That is why on the older cars and trucks they had the warm air tube gong into the air cleaner to keep the carb warm and help it from frosting up. Another fact the Indians of the South west used evaporation of wet hides to make cooling systems for there homes and some times even ice
 

[old]

Caused by weather conditions and normal carb function. If things are right yes it can cause problems. If it is cold and humid where you are yes it can cause a problem and then the next year not a problem. If you have a way to cover that side of the engine with a trap or sheet of metal etc you will find holding the engine heat in will stop that problem. Every year I see posts like this and every year people are told the same thing. Been on here now for over 10 years and I have said the same thing year after year and others have agreed with what I have said time and time again
 

[rustred]

you must not be running them when its below freezing. i have seen carbs ice up since i was 7 yrs. old. perfectly normal.
 

[rustred]

no.
 

[pete 23]

It is normal to some extent because nothing can vaporize without drawing heat from somewhere. The whole theory of air conditioning is based on that. The worst temps for icing are in the 30 to 40 degree range normally. Extremely cold temps normally does not hold enough moisture to cause problems. Then we throw snow in the equasion and that up's the humidity of the air being pulled into carb so it can be a problem when colder. That 560 has a heat stove surrounding the intake where the carb bolts up to. The heat riser with the spring loaded valve is intended to direct the exhaust flow around that area. Problem is, those heat risers stick, burn out, spring fails and then biggest problem is carbon fills the internal passages around that intake inside. That requires splitting the manifold and cleaning them out. I sand blast them. Then, early 560's used a dual venturi which gave better economy but was really bad for carb icing so they switched to a single venturi. The best cure yet is to fabricate a stove around the muffler, pull heated warm air from outside of muffler and right into the air cleaner intake. Carbureted automobiles did that for many, many years. Not the exhaust mind you, don't want that, but a stove around outside of muffler. Other things work somewhat also. Just a shield along side of the hood to direct warm air on carb. Making sure thermostat is bringing engine up to temp. And, shut it down when warm just long enough to melt it and restart it. If you wait too long engine will cool too much. Adding gasoline anti freeze to gasoline will lower octane so don't want to get too carried away with that and it is not the moisture in the gasoline that is freezing anyway, it is the moisture in the air. Been a problem since carburetors were invented.