Outboard Marine Corporation

Guy D Payne

James L Holt

Robert G Dretzka

Gerald F Bland

Ignition pulses derived from an engine ignition coil primary are fed to the input of an ignition interruption circuit that employs an integrated circuit timer. The state of the output terminal of the timer is governed by an RC time constant circuit and by trigger signals supplied by a trigger circuit in response to occurrence of each ignition pulse. The timer output is coupled to the gate of an SCR which when it receives gate current as a result of the timer output being in a high state becomes conductive and bypasses ignition pulses to ground to thereby lower engine rpm to a preset minimum in which case gate current is removed and at least enough ignition pulses are allowed to be unbypassed for keeping the engine running above stalling speed. The timer, in effect, compares the interval between pulses with its time constant. When the intervals are longer than the time constant period the timer output remains low and provides no gate current, but when the opposite condition exists gate current is supplied until the intervals between ignition pulses equal or exceed the time constant period.

Marine propulsion unit having ignition interruption means to assist

Disclosed herein is a marine propulsion device comprising a bracket adapted to be fixed to the transom of a boat and including a generally planar mounting surface engaged with the boat transom when the bracket is boat mounted, which bracket also includes a lower part having a lower bearing with a steering axis which extends generally vertically when the bracket is boat mounted, a member including a lower portion extending in the lower bearing and a pair of laterally spaced arms connected to the lower portion and respectively including upper horizontal bearings having a common axis located in spaced relation above the lower bearing, a steering arm fixed to the member for steerably rotating the member within the lower bearing about the generally vertical axis, a propulsion unit including a powerhead and a lower unit extending fixedly downwardly from the powerhead and including a rotatably mounted propeller, and trunnions on the powerhead adjacent the top thereof and received in the upper horizontal bearings for pivotally connecting the propulsion unit to the member for movement about the horizontal axis between a running position with the propeller submerged in water and with the propulsion unit located wholly aft of the bracket mounting surface and an elevated position with the propeller substantially out of the water and with the propulsion unit located wholly aft of the bracket mounting surface.

Outboard motor mounting means affording upward tilting without travel of

Disclosed herein is a marine propulsion device and apparatus and methods for assisting transmission shifting thereof. The marine propulsion device includes an internal combustion engine and a reversing transmission having a pair of bevel gears and a clutch dog movable between a neutral position out of engagement with the bevel gears and forward and reverse drive positions in full engagement with one of the bevel gears. The marine propulsion device also includes a shift assistance arrangement included in a shift mechanism for axially moving the clutch dog between the neutral and drive positions, and which includes a load sensing lost motion shift lever arrangement having a first switch which is actuated when the resistance to axially moving the clutch dog into a drive position exceeds an upper limit. The shift assistance arrangement also includes an ignition interruption circuit responsive to actuation of the first switch for selectively interrupting the ignition of the internal combustion engine to reduce the engine torque transmitted to the bevel gears to effect relative angular displacement of the clutch dog and the bevel gears to thereby assist the shift mechanism in moving the clutch dog into and out of a drive position. The ignition interruption circuit includes a control circuit having a first timer for providing a plurality of successive timed cycles, each cycle including an ignition-kill interval and an ignition-on interval, and also having a second timer for establishing an overall cycle during which the first timer is operative, subject to the first switch.

Marine propulsion device including ignition interruption means to assist

Disclosed herein is a marine propulsion device including a shiftable, reversing transmission located in a propulsion unit and connecting a drive shaft to a propeller shaft and a shifting mechanism including an actuating member connected to the transmission. Movement of the actuating member to shift the transmission between a neutral condition and forward drive and reverse drive conditions is effected by a shifting system including a flexible dual cable conduit assembly connected between the actuating member and a shift lever mounted for reciprocal movement. The opposite ends of the two shift cables are linked together in a manner such that the movement of the shift lever in opposite directions causes alternate pulling of the shift cables to shift the transmission.

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Lake Villa, IL, United States of America

Guy D Payne