My 1700cc with single weber twin choke, keeps icing up,

[914-6]

As above. I have tried all the normal things like checking for air leaks, correct mixture and timing settings..............any thoughts??
thanks

Ian

[raygreenwood]

Very common. Center mounted carbs require manifold heating.

The beetles use a tube connected to the exhaust manifold. Watercooled cars either have a ceramic pin cushion heater and/or have a connection to the water jacket. Ray

[914-6]

just as i predicted, thanks Ray.