3000 RPM @WOT, 17Pitch Trophy Plus 4 blade,

[mrfishaholic]

I am only turning 3000 RPM at WOT with a 4 blade SS Trophy Plus 17 Pitch Prop. I was told that my 1991 Merc 75HP was supposed to turn 5400-5600 RPM at WOT. Is my tach reading correctly? I was pushing my 1994 Tracker Pro Deep V 16DC 35MPH on GPS at 3000RPM/WOT with this prop. Any recommendations? Is it even possible I was only turning 3000 RPM? My hull is aluminum. Thanks in advance, I am new to the forum.

 

[Barnacle_Bill]

Re: 3000 RPM @WOT, 17Pitch Trophy Plus 4 blade,

What is the diameter of the prop? I have a 94 75hp with a 14" diameter prop. Not sure of the pitch as I just got it. Are all cylinders firing?

 

[mrfishaholic]

Re: 3000 RPM @WOT, 17Pitch Trophy Plus 4 blade,

I just got my motor as well. I believe all 3 cyls are firing. What should be my pitch is really what I need to know. If I should be turning 5400RPM with the prop, then I need to start looking deeper into the motor. But if I have the motor over propped, then I need a recommendation as to the correct prop. I cant imagine using a 12 pitch prop on a 75HP outboard.

 

[ricksrster]

Re: 3000 RPM @WOT, 17Pitch Trophy Plus 4 blade,

Consult the prop forum. Those guys should be able to help you.

 

[mrfishaholic]

Re: 3000 RPM @WOT, 17Pitch Trophy Plus 4 blade,

ok, moving to prop forum