Abstract: An improved mounting arrangement for mounting of an outboard motor on the transom of an associated watercraft embodying elastic mounts comprised of an inner tube, an outer tube, and an interposed elastic member. The inner tube defines a cavity that receives the elastic member that is non-circular in cross section so as to permit a greater volume of damping material in a given spatial relationship.

Abstract: Two embodiments of carrying handles that can be permanently connected to an outboard motor for carrying the outboard motor when not in use. In each embodiment the carrying handle is connected so that it extends in a generally vertical direction in normal condition of the outboard motor and which can be grasped by a user for carrying of the outboard motor at the user's side, with the user's wrist in a normal condition. The carrying handle is associated with a latching bracket that latches the lower end of the handle to the clamping bracket for the carrying operation.

Abstract: A hydraulic assisted outboard drive arrangement wherein the hydraulic assist is controlled by an electric motor driven fluid pump. To assure the availability of hydraulic fluid immediately upon demand, the electric motor is continuously driven at a low speed and is switched it a higher speed in the event of operator demand for power assist.

Abstract: A number of embodiments of induction system for fuel injected outboard motors. In each embodiment the fuel injectors are bounded on at least two sides by the induction system so that the airflow through the induction system will cool the fuel injectors.

Abstract: A number of embodiments of flushing arrangements for the lower unit of a marine propulsion device that embodies an underwater exhaust gas discharge. Flushing water is delivered to the outer surface of the portion of the outer casing that is above the water level and that is in direct heat exchanging contact with the exhaust gases for cooling the surface and flushing possible deposits therefrom.

Abstract: An engine of an outboard motor includes an improved engine component layout to minimize the size of the engine and to improve the performance of the components. A separator of a crankcase ventilation system is located on a cam cover outside the cam chamber in order to reduce the size of the cam cover while providing the necessary spacing between the separator and the valve mechanism within the cam chamber. A fuel pump is positioned at about the center of the cam cover, beneath the separator, to generally balance the length of fuel travel to each of the carburetors. A fuel filter also is located on the cam cover, beneath the fuel filter, to generally isolate the fuel filter from the effects of the heated cylinder head and block. The arrangement of these components does not interfere with the hinge-like travel of a top cowling, which surrounds the engine, relative to a lower tray.

Abstract: An outboard motor having a starter motor and other electrical components which are mounted adjacent the crankcase of the engine but in spaced relationship thereto by a mounting plate for providing heat insulation.

Abstract: Two embodiments of corrugated paper shipping boxes that can be knocked down into a flat form and in which a cradle support is also formed by corrugated paper for holding the shipped article away from the sides of the box. In one embodiment, the cradle is formed by extensions of the end flaps of the end walls of the box and in another embodiment, the cradle is formed as a separate assemblage also from corrugated paper and adapted to be folded into a flat configuration. This facilitates storage and disposal and eliminates the use of foamed plastic insert pieces.

Abstract: A filtration concentration apparatus and method by which a high operation efficiency of a filter is assured are disclosed. The filtration concentration apparatus comprises an original liquid intake path interconnecting a primary side of a pump and an original liquid storage tank, an original liquid supply path interconnecting a secondary side of the pump and an original liquid chamber of a filter, an original liquid return path interconnecting the secondary side of the pump and the storage tank, an original liquid recovery path interconnecting the original liquid chamber and the primary side of the pump, a liquid discharge path interconnecting a bottom portion of the original liquid chamber and a waste liquid tank, and a control unit for controlling the recovery path to open when the intake path and the supply path are open and controlling the intake path and the supply path to close when the recovery path and the return path are open.

Abstract: A remote control operator for a marine propulsion transmission and throttle control that is operated by a single control lever. The single control lever's position is sensed and a single servomotor is operated which operates both the transmission control and throttle control through a cam and follower mechanism. A warmup control is also incorporated that permits partial opening of the throttle for warmup operation.

Abstract: A protective cowling and air silencing device for the power head of a watercraft propulsion unit. The cowling is provided with an atmospheric air inlet opening, and a duct is provided internally in the cowling for assisting in water separation by directing the inlet air downwardly toward a drain opening. The engine is provided with charge formers that have an air silencing device that is provided with at least one resonating chamber on the side of the charge former and which communicates with a delivery passage of the device through a tuning neck for silencing purposes.

Abstract: A catalytic exhaust treatment system for an outboard motor wherein a catalyst bed is supported within the exhaust pipe on a support plate that permits the catalyst bed to expand and contract relative to the surrounding exhaust pipe from which it is spaced. The exhaust gases can flow through the catalyst bed and around the catalyst bed for complete treatment.

Abstract: A protective cowling arrangement for an outboard motor that provides an atmospheric air inlet having a pair of openings disposed above the engine for permitting atmospheric air to flow into the protective cowling for engine combustion. One of these openings is disposed in part above components of the engine which should not be contacted by water and this opening is substantially smaller than the other opening. An engine cover is also affixed to the engine and obscures the smaller opening to afford further water protection.

Abstract: A ventilation system is provided for an engine crankcase of a marine outboard motor to distribute blow-by gas generally equally to each cylinder while minimizing the size of an intake silencer of the system. The intake silencer includes a first expansion chamber into which the blow-by gas is introduced from a blow-by gas camber attached to the cylinder head. The blow-by gas diffuses and mixes with ambient air which is drawn into the first expansion chamber through an inlet port of the induction system. The air/blow-by gas mixture is then drawn into a second expansion chamber where it distributes generally evenly before induction into a charge forming device.

Abstract: A hydraulic device for interposition between an outboard propulsion device and a watercraft transom for controlling the trim position of the propulsion device, for permitting the propulsion device to pop up when an underwater obstacle is struck and to return to the trim adjusted position and also including a bypass valve for permitting manual tilt up of the propulsion device without fluid restriction.

Abstract: A drive arrangement for the camshaft of an internal combustion engine employed in an outboard motor that includes a pivoted idler pulley that is disposed within the outer periphery of the flywheel but which has a portion extending beyond the flywheel for adjustment without removing the flywheel.

Abstract: Several embodiments of outboard motors embodying four-cycle engines having an oil tank that is contained within the drive shaft housing and which is surrounded at least in part by a water cooling jacket for maintaining the oil at an acceptable temperature. The oil tank is formed with a cavity through which an exhaust pipe passes and the area between the exhaust pipe and the oil tank forms, in at least some embodiments, an expansion chamber for silencing the exhaust gases. At least in part of the exhaust pipe and/or expansion chamber is also cooled by a water cooling jacket.

Abstract: A warning system embodied in a remote control system which includes a warning circuit and which alerts the individual operating the system if the position of a controlled member of the system does not correspond with the position of the remote operator of the system within a preset period of time after the operator is moved.

Abstract: A number of embodiments of V-type outboard motors including 4-cycle engines with a exhaust system being disposed between the cylinder banks so as to simplify the exhaust manifolding and permit it to flow downwardly directly to the exhaust pipe in the driveshaft housing lower unit so as to reduce engine height. Various porting and cooling arrangements are disclosed. The induction system for the engine is disposed on the outside of the engine and a variety of induction systems and throttle control arrangements are also disclosed.

Abstract: An improved outboard motor construction having a power head which has a water tight lower portion which is submerged when the associated watercraft is not in a planing condition so as to provide a buoyant assist for the watercraft to reach the planing condition without any attended hydrodynamic drag when planing.