BACK-FIRING
, Back-firing, or rather explosions in the exhaust system, which actually are rather a different thing, indicate a lean mixture. If these noises are in evidence on a down grade but the engine performs well on the flat, it is best not] to interfere with the carburettor setting but to open the choke slightly and so allow,a richer mixture to enter the combustion chamber. A true backfire is not this noise in the exhaust system but arises from valve trouble, an inlet1 valve being still open when the mixture fires, so allowing a blowback into the carburettor. This is dangerous, as liable to cause fire. The other trouble may result in a damaged muffler. '.
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Bibliographic details
Evening Post, Volume CXXIV, Issue 57, 4 September 1937, Page 28
Word Count
114BACK-FIRING Evening Post, Volume CXXIV, Issue 57, 4 September 1937, Page 28
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