carberator freeze ????

The carbs are iceing up. Usually happens in the powder . Happens on aircraft as well. They pull on the carb heat linkage. We turn our carb heat valve on that is underneath the hood and up against the slush box. 99 and newer has this. My old 97 did not. Yours should have it.
 
carburetor freezing is basically just like it sounds, usually happens when the air is very humid just around freezing. The water vapor in the air will condense inside the passages in the carb and freeze up constricting the flow and cause the engine to bog, cut out, run lean or even not run at all.

Its not very common in sleds, especially yamahas since a lot have heated carbs, and the stock air box seems to catch some of the moisture before it can enter the carb.
 
If you have enough water in your fuel that could also freeze, but thats another issue in itself.
 
My carbs freeze too. Sometimes it will foul a plug or two. I park it indoors most of the time.
 
brade07 said:
carburetor freezing is basically just like it sounds, usually happens when the air is very humid just around freezing. The water vapor in the air will condense inside the passages in the carb and freeze up constricting the flow and cause the engine to bog, cut out, run lean or even not run at all.

Its not very common in sleds, especially yamahas since a lot have heated carbs, and the stock air box seems to catch some of the moisture before it can enter the carb.
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Or more common on sleds - snow dust.

But as mentioned, most modern air boxes (with foam in place) keeps it out.

It is also another reason TORS was invented.

BTW carb icing can occur up to 38F.
 
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