Re: 5100 rpms?
We need more info to tell for sure where you are at.Depending on the year of the motor it is rated at 5,300 to 5,800 rpm.Usually suggested to prop near the top of the rpm range.Without your boat info with your rpm and speed its difficult to evaluate your prop selection.If you read the stickies at the top of the page and on the prop store page it should help you understand prop selection a little better.