While carburetor icing is quite common under certain conditions (generally 25 - 40 degrees F.) and very high humidity and low heat; unexpected carburetor icing is the engine's suggestion to check the carburetor for being overly rich.

A float setting too high by only 1/32 inch can do it.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop