Patent ID: 6655335
Filing Date: 2003-12-02
Classification: F02B,F02D,F02M

Abstract:
A small engine comprising:a carburetor, an air cleaner through which air is supplied and a source of fuel from which fuel is supplied, both being directed into the carburetor whereat vaporized fuel is produced, an air inlet to the carburetor and a passageway that extends through the carburetor and into a crankcase chamber and from the crankcase chamber to a combustion chamber overlying a cylinder and reciprocating piston, said reciprocating piston producing a pumping action for pumping vaporized fuel from the carburetor and through the passageway and into the combustion chamber; said engine having a desired work output as measured by the rate of reciprocation of the piston while in a working mode; and a restriction member positioned between the air cleaner and the air inlet to the carburetor, said restriction member having an opening through which air enters the air inlet, said opening sized to restrict air flow to substantially the air flow required to achieve said rate of reciprocation of the piston while in the working mode.