I have read quite a lot on the pro's and con's of fitting a High Thrust prop to a standard engine. There seems to be a lot of different opinions so I have not really ended up with a conclusive answer. Have any of you guys got any first hand experience you could pass on please? From previous posts you may gather that I have only just purchased the H260 and I have not used the boat yet so I have no experience of it's performance. My engine is 2006 Yamaha 9.9 hp Long Shaft 2 stroke with what I believe to have the standard prop fitted (9 1/4 x 9 J). From what I can find here in the UK is a High Thrust (or Dual Thrust) 9 3/4 x 8 or 9 1/4 x 11. These are all three bladed props.