freebeerisgood
Member
I have a 26ft walk around cabin/10ft beam/powered by a 1998 7.4l MPI Bravo I w/~670hrs on it
Current prop is a Mirage Plus 3 blade/19p (48-13700) and I am making 4100 RPM WOT - It has always been that way since I put the engine in the boat in 2003, its running great but I would prefer to prop it correctly and get another 4-500 RPM at WOT.
Im looking at a Revolution 4 prop based on reviews mostly, with a desire to have better cruise performance and increased "bite", particularly for bad weather performance.
Im thinking that every inch of pitch reduced will give me ~200 RPM.....I need a 17P prop to give me about 4500RPM. Online, I read the Revolution 4 will turn 300RPM lower than my prop, at the same pitch. Looking at what is offered in the Revolution 4, it seems that the 15P is the best option to make the RPM my engine needs at WOT. That should give about 4600RPM??? Ballpark What can I realistically expect per inch? Is 200RPM accurate?
Am I on the right track?
Anyone recommend a 4 blade prop other than the Revolution 4?
Current prop is a Mirage Plus 3 blade/19p (48-13700) and I am making 4100 RPM WOT - It has always been that way since I put the engine in the boat in 2003, its running great but I would prefer to prop it correctly and get another 4-500 RPM at WOT.
Im looking at a Revolution 4 prop based on reviews mostly, with a desire to have better cruise performance and increased "bite", particularly for bad weather performance.
Im thinking that every inch of pitch reduced will give me ~200 RPM.....I need a 17P prop to give me about 4500RPM. Online, I read the Revolution 4 will turn 300RPM lower than my prop, at the same pitch. Looking at what is offered in the Revolution 4, it seems that the 15P is the best option to make the RPM my engine needs at WOT. That should give about 4600RPM??? Ballpark What can I realistically expect per inch? Is 200RPM accurate?
Am I on the right track?
Anyone recommend a 4 blade prop other than the Revolution 4?