A torsional throttle control system is provided that may include any of a number of features. One feature of the throttle control system is twist-style grip that has an axis with an angle adjustable to a housing. Another feature comprises trim and/or outboard motor control(s) atop the grip. Yet another...http://www.google.co.uk/patents/US7172478?utm_source=gb-gplus-sharePatent US7172478 - Torsional control boat throttle system
