ORIGINAL: Justaddwata
I would just reduce the size and blade of the props you have. Do it a little at a time and be sure you get all blades the same size (and balanced). I have removed leading edge on several large props with a few boats in order to get the rpm up to a point that is more usable.
Keep in mind that an overdriven gearbox (like the 1.33:1 MHZ) will never spin a prop easier - it instead load up the motor more)
Hi Matt,
Is this the same reason why I do not see a lot of twin drives going faster than 30 to 35 MPH with the same set up because the power plant should really be pushing out more HP and RPM unless they are proped down to a 2 or 3 blade set up with smaller pitch - unless of course the power plant is a turbine engine that can put out the RPM then most definitely it would not be a problem. Am I right in this assumption? Would I also be right in assuming that if I had bought a wd gearbox 1 would had been given me a better result?