Back draft carburetor for two-cycle engines

Details Back draft carburetor for two-cycle engines Back draft carburetor for two-cycle engines

F - Mech Eng,Light,Heat,Weapons

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123/47, 123/59

F02M 17/44 (2006.01) F02B 61/04 (2006.01) F02M 7/11 (2006.01) F02B 75/02 (2006.01)

Patent

CA 1060293

BACK DRAFT CARBURETOR FOR TWO-CYCLE ENGINES Abstract Vacuum, created by venturi effect of the throttle valve within the throat of a carburetor of a two cycle outboard motor, in company with a vacuum source oriface positioned opposite a peripheral edge of the throttle valve, is partially applied, by strategic placement of a vacuum source hole, to the fuel float chamber of the carburetor to reduce fuel flow over a selected range of engine RPM; normally when the boat it is driving is cruising on plane. A changeable vent to atmosphere is used to adjust the vacuum level to compensate for altitude changes and to adjust the carburetor to a particular motor. An expansion chamber in the vacuum source line may be required to prevent engine hesistation upon acceleration.

251660

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