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Piston engine and carburettor heater?
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4th Dec 2019, 04:54
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Gauges and Dials
Join Date: Feb 2012
Location: USA
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My guess would be that the normal intake path is slightly obstructed (e.g. by a filthy air filter, or a foreign object somewhere in the plumbing) and that switching to carb heat draws air via a less obstructed pathway.
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