Ok here goes...<br /> motor= 1975 85hp johnson<br /> wot= 4700 <br /> prop dia.= 13" pitch=??<br /><br />I've read some posts that say the recommended rpm's @wot should be between 4500-5500. Is this true? If so I guess I am ok at 4700rpm's correct? The boat, (17'Crestliner), only goes about 28mph on the gps. The current propeller has no markings on it that I can find. I measured the dia. and it is 13". By looking at a few sites that sell props the only 13" diam for my motor is a 19" pitch so I assume that is what I got. <br /> Now I am considering either a 13 1/4" X 17 or a<br />13 3/4" X 15. I assume the latter will bring the rpm's up more but what about top end speed and hole shot? I will be pulling a tube on occasion and maybe a skier. What would you guys recommend?<br />Thanks,<br /><br />Rich
