Re: 19" pitch/ 21" pitch SAME WOT RPM ??????
I'm with Hasbeen (now there is a qoutable quote)---put a 21 pitch Mercury Vengeance SS on there and have another go.<br /><br />Are you trimmed to the end of your limit range?<br /><br />Running the standard 250 hp small block Chevy, I hit 62.3 (gps) at 4800 rpm on the dashboard tach.<br />Just me in the boat, full tank of gas, light chop on the water.<br /><br />If you are running a Chapparal boat the hull design may limit your top end somewhat, but a stainless prop should give you 4 to 6 more miles per hour at the same rpm.