Abstract: The invention provides a remote oil tank (19) to supply oil to an oil reservoir (29) mounted on a two-cycle, crankcase compression engine (10) such as used for outboard motors. Crankcase pressure may be used to pressurize the remote tank (19) to move the oil.

Abstract: A two cycle engine having piston controlled inlet and exhaust ports is provided with a secondary one-way valved air fuel mixture passage to the combustion chamber adjacent the spark plug.

Abstract: A three cylinder, two-cycle engine 10 has a tuned exhaust system formed in a die-cast cylinder block 14. The exhaust manifold is formed by a cavity on the exhaust side of the cylinder block 14 with an exhaust gas outlet passageway 30 formed in the head end of the block 14.

Abstract: An outboard drive unit for a watercraft having a through-the-propeller hub exhaust system for engine exhaust has a bearing support member (22) which carries the propeller shaft (18) and separates the exhaust passages from the propeller shaft gears (24) and (25). Lubricant retaining surfaces (4B) are formed on the bearing support member (22) to prevent corrosion between the support member (22) and housing (11).

Abstract: A twin lever control actuator (10) for operating push-pull cables (17) has two sets of two pulleys (12, 13), one set on each side of a control body (11). The cable cores (18) are attached to the pulley cables (15) on the straight run of pulley cable between the pulleys to provide linear actuation of the push-pull cables (17). A ball detent (52) or a friction pad (58) can be used to provide an adjustable control load.

Abstract: A cowl for the power head (11) of an outboard motor (10) includes two bottom cowl members (14, 15) attached together by screws which also mount a latch bracket (26) and a hinge member (25). The latch bracket (26) supports a latch mechanism which, with the hinge member (25) serves to hold a top cowl member (13) in place.

Abstract: The exhaust manifold for a water cooled, two-cycle, V-6, crankcase compression, outboard motor engine is cast integrally with the engine cylinder block. The manifold forms one wall of a central cooling passage.

Abstract: A two-cycle engine (10) has an idle fuel system which admits fuel-air mixture into the transfer passages (22). Heated air is supplied to the idle mixing passage (42) by a serpentine air passage (45), while fuel from the carburetor float bowl (33) is supplied through a needle valve (50). A reed valve (43) admits the idle mixture to the transfer passage (22).

Abstract: In a water cooled, two-cycle, crankcase compression, V-6, outboard motor engine, cooling passages are provided on the outside of the V, near the crankcase. The engine uses an exhaust manifold cooling jacket to preheat the coolant before supplying it to the engine block cooling passages.

Abstract: A safety stop switch for a marine engine includes a control unit housing, and a normally closed, single throw toggle switch mounted on the housing and including a switch arm extending away from the housing to permit operation of the switch between closed and open positions. The switch is electrically connected to the engine to interrupt engine operation when switched to the open position. A hood extends from the periphery of the housing and covers the switch arm when in the closed position, and has a peripheral lip which is spaced from the switch arm a dimension which is less than the thickness of a key which encircles the switch arm. A lanyard is connected to the key and to the boat operator, and upon the exertion of a force on the lanyard, the key pulls the switch arm down into the open position, thereby interrupting operation of the marine engine.

Abstract: An induction system for a V-type two-cycle crankcase compression engine (10) with a vertical crankshaft (14) uses two-barrel carburetors (17) with the barrels (19) horizontally adjacent to supply air-fuel mixture to the engine (10). A crankcase compartment (15) is provided for each cylinder (11), the compartments (15) being in a vertical row and surrounding the crankshaft (14). A carburetor adapter or inlet manifold (18) connects each carburetor barrel (19) to one of the crankcase compartments (15).