Re: Icing carb heat riser assembly

Posted by Janicholson on January 06, 2012 at 08:33:54 from (199.17.6.72):

In Reply to: Icing carb heat riser assembly posted by Rich8262 on January 06, 2012 at 02:38:08:

To assess if there is hope for your tactic move the flap (if it is actually in the plenum) to the open side and see if it helps. If it does, and you want it to be automatic, there may be bi-metal springs to do it, (I have no sources). But a tab that allows it to be seasonally adjusted would be usable. Usually the carb richens up and it acts like it is being restricted and choked at the same time. Frost on the outside is common in 5 minutes but internal freezing usually takes a little more time. many pieces of heavy equipment have intake heaters on the exhaust/muffler leading to the air intake to prewarm the air. Carbs from the mid to late 60s had heat stoves on the manifold, and crossover exhaust heated intakes.
That lasted until carbs were replaced by Port Fuel Injection. Jim

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