Hi Roger - Am I to understand that Volvo is claiming their system has a 35% greater efficiency in propulsion ability alone? That their 260HP powered rig will move a boat along as fast as a conventional drive with 350HP? Regards, John "Seahorse" I appreciate what you are saying, Tim, but that the power output quoted below are absolute terms. What Volvo say is that because of the increased efficiency etc etc of the IPS drive - their 260hp engine connected to an IPS drive equates to an output of 350hp for an engine connected through a standard reduction gear. Therefore a builder can use a lower rated IPS engine for the same/similar performance envelope of a larger "standard" installation. Their claim/explanation - not mine. **************************************See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)