prop info question

[tsport]

I have a 1986 grady white bowrider 20 ft it has a 170hp 470 alpha one drive according to the tach i;m turning 44-45 hundred rpm the prop is a 14 dia 19 pitch. Is the rpms to high for this motor? I rarely go wide open but when i do the motor sounds like its screaming. I don't have a speedometer or a gps don't no how fast i;m going but it dosen't seem to speed up much from 3/4 to full throttle anyway thanks for any /all replies

 

[Bondo]

Re: prop info question

i;m turning 44-45 hundred rpm the prop is a 14 dia 19 pitch. Is the rpms to high for this motor?

Ayuh,... That sounds 'bout Right to me...

 

[steelespike]

Re: prop info question

The setup sounds about right and your rpm is right we could tell a lot better if you got your speed by a gps.
Some cell phones have a gps app. Read "read this first" at the top of the prop main page and get us as much info as possible.
Your gear ratio may be stamped on the out drive.

 

[tsport]

Re: prop info question

thanks for the replies i'll try to get as much info as i can and let you all know. The boat dose run / ride good and that is the prop it came with I was just wondering if it was the right one I.m going to have to get a mph reading thanks again