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An engine will not run if the air–fuel mixture is either too rich or too lean.
Most air filter housings are located on the side of the engine compartment and use flexible rubber ...
An engine in good mechanical condition should produce 17 to 21 inches Hg of vacuum at idle at sea ...
A steady needle reading that rises 2 or 3 inches Hg when the engine speed is increased slightly ...
After the engine has been cranked for four “puffs,” stop cranking the engine and observe the ...
Two wells are filled with different antigens and when they diffuse, they form lines that cross which ...