thank You for Your Respone and your Help.
It's a HPDI Version. I will check the Oil Pump the next time when I'm on the Boat.
Currently I have the original Yamaha Black Steel 23". It's running about 4.700 rpm. I got a Rapture Test Prop with 21". No big differnce exept higher rpm for Crusin at 30mph. The Top Speed was a little less (about 40 mph). With the Yamaha black Steel itīs about 42 mph. But the max rpm is always about 4.600 - 4.700.
The boat has 1.080 Kg (I dont know how much in Punds) plus the Engine. I have about 260liter fuel Tank. Itīs a Italian Rib. ZAR 65 Suite (6,5m). (see: http://www.zar-formenti.com
) Lokks pretty nice and is excellent under roughwater Conditons).
Greetings from Vienna