Abstract: An internal combustion engine is provided with an exhaust discharge system providing merging exhaust paths for discharging exhaust from individual cylinders into an exhaust cavity. A diverter valve is provided for selectively preventing merger of the exhaust from the individual cylinders prior to discharge, and an exhaust passage receives such diverted exhaust for discharge into the exhaust cavity. The diverter valve operates to divert exhaust at low speed operation, which provides satisfactory low speed exhaust tuning. The diverter valve is closed at high speed operation to allow the exhaust from the individual cylinders to merge prior to discharge, which provides satisfactory high speed exhaust tuning. The invention provides satisfactory exhaust tuning at both high speed and low speed operation, which heretofore had not been possible, to increase overall engine performance and power.

Abstract: A marine stern drive unit (1) includes an assemblage of a propeller-carrying drive shaft housing (10), a bell housing (9) and gimbal housing (8). Mating flow-through passages (21, 23) are disposed in the drive shaft housing and bell housing, and a dual control valve system (30, 31) joins the passages at their juncture. The valve system is arranged to be open when the two housings are assembled, but closes automatically when the housings are disassembled to retain lubricant in the separate housing assembles when the latter are separated for servicing. The valve system includes a valve (31) in one of the passages (23) which is constructed to be snapped together and to be held firmly within the passage, but manually and quickly releasable therefrom when desired. The fluid passage (23, 26) in the bell housing communicates to the gimbal housing which has a sealed fitting (60) and a lubricant carrying portion (65) passing through the usual gimbal mounting hole (14) of the boat transom (2).

Abstract: A hose washing machine is provided including a frame and a pair of brushes supported by the frame in opposed relationship and for receiving a hose therebetween. Each of the brushes has a planar brush face engageable with the hose, and the brushes are supported for rotation about an axis transverse to the planar brush faces. The brush face of one of the brushes is positionable in opposed mating relation with the brush face of the other brush, and at least a portion of each of the brush faces engages the hose and moves in a direction transverse to the longitudinal axis of the hose. A first motor is provided for rotating one of the brushes in one rotational direction, and a second motor is provided for rotating the other of the brushes in an opposite rotational direction.