A 40-year-liveaboard couple describe their variable pitch propeller that can vary engine load at different rpm, like an automobile transmission, allowing the engine to be efficient at any speed. Describes use with and without a pyrometer.
A 40-year-liveaboard couple describe their home-designed prop-shaft alternator. It provides unusual charging abilities when combined with the engine alternator.
The Shaft Razor Cutter rotates with the prop shaft and cuts anything that becomes entangled on the shaft or propeller. Installation consists of removing the propeller and sliding the cutter onto the shaft and tightening the set-screws.
A propeller inspection service provides a brief description of the nine distinct problems boaters experience with their propellers, form noise and vibration to lack of power to engine over- or under-loading.
A propeller inspection service provides a list of steps to take when installing a new or newly remanufactured propeller.