Patent ID: 6174264
Filing Date: 2001-01-16
Classification: B63H,F02P,F16H,Y02T,Y10T

Abstract:
A marine propulsion unit and control therefore, the marine propulsion unit including a water propulsion device powered by an engine through a transmission, said transmission having at least one drive position in which a transmission gear is drivingly engaged with the water propulsion device so that the water propulsion device is driven by said engine and a non-drive position in which said transmission gear is not drivingly engaged with the water propulsion device so that the water propulsion device is not driven by said engine, said engine having at least one combustion chamber, an air and fuel supply system supplying air and fuel to said combustion chamber, and at least one ignition element corresponding to said combustion chamber for igniting said air and fuel mixture supplied to said combustion chamber by said air and fuel supply system, said control arranged to delay the timing of the firing of said ignition element during engine idle from a normal firing timing when said transmission is in said non-drive position, said control further being arranged to advance the timing of the firing of said ignition element if said engine speed rapidly reduces and said position of said transmission is changed from said non-drive position to said drive position.