Abstract: A moisture inhibitor system for wet exhausts as utilized in marine applications such as boats and other watercraft. The preferred embodiment of the present invention contemplates an exhaust manifold having an inner exhaust passage which has situated therein a collection barrier or raised pocket situated to collect moisture migrating from the exhaust port, generally at the stern of the vessel. The collection pocket is heated by the exhaust stream, and is formed to collect and retain the migrating moisture, while simultaneously the heated walls of the collection barrier evaporate the collected moisture forming moisture vapor, which moisture vapor is urged through the exhaust passage and the exhaust port, where it is leaves the system. The system thereby prevents moisture migrating up the exhaust passage from reaching the engine.

Abstract: An enclosed shaft system for tunnel jet drive marine propulsion systems for providing an improved lubrication and coolant system over current designs. The preferred embodiment of the present invention contemplates the utilization of an enclosed shaft system wherein the drive propeller drives a portion of the water passing through the tunnel drive through a water intake, which water is filtered and directed to a "T" fitting, wherein a portion of the water is directed to the engine for cooling, and the remaining water is directed to the base of the shaft housing, wherein the water passes through an shaft sleeve enveloping the shaft, the shaft sleeve terminating at an open end wherein the cutlass bearing and propeller is fitted. The water passing through the shaft sleeve both lubricates the cutlass bearings, as well as cooling same.

Abstract: A combination throttle/shift control system, configured for providing the full control of throttle and shift functions on a single lever, taught in the exemplary embodiment in conjunction with a marine propulsion system. The preferred embodiment of the present invention allows the full control of propulsion systems throttle and control functions in a single lever, as opposed to most traditional designs, which require the utilization of separate control levers and cables. This is accomplished via the utilization of a relay triggered actuator arrangement wherein there is provided a magnetic switch system for monitoring the positioning of the actuator travel rod relative a switched relay system. The present invention simplifies both the use and mechanical complexity of throttle and shift control systems, resulting in an appreciable increase in the ease of use, while reducing overall expense and maintenance requirements.