It's alive

53DC · Jun 12, 2010

Well I cleaned up the DC. Put in a new battery, fresh gas and she fired right up. This after sitting through a shed fire and the sitting in the barn for 4 yrs. Purrs like a kitten.

There is one thing that is concerning me. I left it run for about 5 min. and noticed that the top half of the carb as well as the throat that runs from carb to intake manifold was very cold and the carb actually began to turn white. Ran it for just a few min. longer and it stayed ice cold. Never seen anything like that before. Any ideas?

Gene Dotson · Jun 12, 2010

Common occurance, called carburetor icing. Air passing through the carburetor ventuti increases in velocity and decreases pressure causing the air to be cooled below freezing temperature. Same principal as air conditioning and refrigeration. Very humid conditions makes thid condition much more severe.

It will not cause damage running this way unless the ice is also forming inside the carburetor thus restricting the air flow and casuing the engine to lose power.

Many times you can shut the engine down and let the carbureor and manifold warm up and often will run normal for quite a while... Gene

JGarner · Jun 12, 2010

Sopunds like your oil bath air cleaner is plugged enough that the air flow across the patially plugged filter is creating a high pressure drop which also causes a temperature drop in the intake air as well. Take the filter loose from the carb intake for just a few minutes while it is running and see if it does the same thing, bet it doesn't.

Jim

53DC · Jun 12, 2010

Thanks guys

It's alive

53DC

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Gene Dotson

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JGarner

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53DC

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