Abstract:
A throttle and transmission control assembly adapted to be mounted on the tiller of an outboard motor for controlling its transmission and throttle. Both the transmission and throttle controls employ devices that convert rotary into reciprocating motion and which amplify the reciprocating motion so as to permit a compact assembly. The movable components are all mounted on a single piece of the assembly so as to minimize manufacturing variations and to simplify the overall construction. In addition, an interlock is provided that controls the maximum speed at which the engine can be operated when in neutral and for blocking shifting into neutral from forward or reverse when operating at a greater than a predetermined speed but for permitting forced movement into neutral under some engine speeds and, at the same time, reducing the engine speed to the maximum permitted at neutral upon such shifting.
Abstract:
A control handle for the tiller of an outboard motor that embodies a twist-grip throttle control, a pivotally supported transmission control and a trim switch, all juxtaposed to each other but oriented in such a way so that actuation of one will not affect accidental actuation of any other control. The trim control is disposed in a projection on the lower side of the outer housing of the control handle and is disposed inwardly from the sides thereof and is protected by a flange.
Abstract:
A boat propulsion system includes a drive bevel gear fixed on a lower end of a drive shaft, a forwarding bevel gear and a reversing bevel gear rotatably fitted on a propeller shaft and meshing together with the drive bevel gear, and a dog clutch mounted on the propeller shaft and rotatable with the propeller shaft, moves in an axial direction of the propeller shaft, and meshes together with the forwarding bevel gear or the reversing bevel gear to rotate the propeller shaft, in which the propeller shaft comes in contact with the forwarding bevel gear via a forwarding side buffer member having a disc spring as a component member. The boat propulsion system prevents and minimizes sound and impact even when variations in thrust force occur.
Abstract:
A boat has an outboard motor that is mounted to a hull and has a fuel system. The outboard motor has a cowling housing an engine. The fuel system includes a fuel pump disposed within a sealed container. The sealed container provides a physical and thermal barrier to seawater and engine heat that may otherwise degrade fuel pump operation. The sealed container can also include an internal insulator.
Abstract:
A boat has an outboard motor that is mounted to a hull and has a fuel system. The outboard motor has a cowling housing an engine. The fuel system includes an insulator that covers at least a portion of a fuel filter. The insulator provides a physical and thermal barrier to seawater and engine heat that may otherwise cause vaporization of the fuel. The insulator may include one or more insulating pieces.
Abstract:
A control system for the ignition system of an internal combustion engine for providing faster idle speed when the engine is at a low temperature by advancing the spark timing. A first temperature sensor which senses actual temperature is mounted in the engine ignition control circuit which is, in turn, mounted in proximity to the engine so as to approximate its temperature. A on/off temperature switch is mounted directly in the engine so as to sense when engine temperature is above a predetermined value. The system is operative to provide ignition control by the actual engine temperature unless the second on/off switch is turned on to indicate that the engine temperature has not returned ambient temperature after a running period. If the engine temperature switch is on, normal ignition timing is employed.
Abstract:
A propeller unit for a marine vessel propulsion device includes an inner cylinder arranged to be fixed to the propeller shaft, an outer cylinder, a first driving force transmitting member, and a second driving force transmitting member. The propeller unit for marine vessel propulsion device further includes a pair of first engaging portions, and a pair of second engaging portions provided on the outer cylinder and the second driving force transmitting member. The pair of second engaging portions are arranged such that the mutual engaging of the respective second engaging portions is disengaged when a driving force is not transmitted to the propeller shaft and are arranged such that the respective second engaging portions become mutually engaged in a driving force transmittable manner by elastic deformation of the first driving force transmitting member when a driving force that is not less than a reference driving force is transmitted to the propeller shaft.
Abstract:
An outboard motor features a compact throttle control and transmission shifting control on a handle connected to a tiller. An interlock is designed to limit the maximum engine speed at which the engine can be operated when in the transmission is in neutral and to lock the transmission in neutral or out of neutral when the engine is operated at a speed greater than a second speed that is less than the maximum speed.
Abstract:
A boat has an outboard motor that is mounted to a hull and has a fuel system. The outboard motor has a cowling housing an engine. The fuel system includes a fuel pump disposed within a sealed container. The sealed container provides a physical and thermal barrier to seawater and engine heat that may otherwise degrade fuel pump operation. The sealed container can also include an internal insulator.
Abstract:
An outboard motor includes a housing unit mounted on an associated watercraft. An engine is disposed above the housing unit. The engine defines a first exhaust passage communicating with a combustion chamber of the engine. The housing unit defines a second exhaust passage communicating with the first exhaust passage. The second exhaust passage communicates with outside through at least an underwater exhaust discharge port formed at a portion of the housing unit. An air intake device communicates with either the first exhaust passage or the second exhaust passage. The air intake device includes a one-way valve that allows air to enter the first or second exhaust passage and inhibits exhaust gases from moving beyond the one-way valve.