I have a 2000 mdl f50tlru yamaha outboard mounted on an 18' river john. At WOT and trimed out it is only running 5-5100 rpm. I was told that it should run between 5500 and 6000 rpm at wot. I got the # off the prop and it is mich wheel 992404 11p. So I figured I would order a 9p and fix the...
