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Old 06-30-2010, 10:58 PM
FlyingHorse87 FlyingHorse87 is offline
Motorized Bicycle Member
Join Date: Jun 2010
Location: Jeannette, PA
Posts: 24
Default Muffler discoloration

I'm breaking in my engine and the chrome muffler is discoloring or "blueing". I know from motorcycling that exhaust blueing means the engine is running too rich, but is it running rich from the 16:1 petrol/oil mix or does the carb need adjusting? My idle screw is about 4 turns out, the side is about 1/8" from the bottom of the carb body. Could it just be the cheap chrome plating burning off?
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