Propeller selection, performance comparison, prediction, experience, and modification.

Surface Drives. Arneson, BPM, Seafury, PSI, Levi, Etc.

Jet Drives (pumps, impellers, etc.)

2-stroke and 4-stroke outboard motors.

Stern drive lower and upper units, transom and gimbal assemblies, steering, and trim pumps. Mercruiser (Alpha One, Alpha One Generation II, Alpha SS, Bravo One, Bravo Two, Bravo Three, Bravo XR Sportmaster, TRS, Speed Master), IMCO, ILMOR, Konrad, OMC, Volvo Penta

Inboard and Vee-drive hardware: struts, stuffing boxes, transmissions, coolers

Diesel Engines

Gasoline Engines

Hybrid propulsion such as diesel electric, hydraulic.

A forum to discuss "do it yourself" marinizing of engines / conversion of automotive engines to marine use.