Hello everyone and thanks in advance for the help and advice. I have a 2006 Ranger 188vs.
With a 6” Slidemaster jack plate. It is powered by a 2010 Mercury Optimax with a 23p tempest plus prop. Water temp is 51 degrease. Ever since I owned the boat it seems like the rpm’s are fairly low. With the water temp we have now the motor struggles to make 5200 rpm. Boat does 50 and that’s it. I’m not in it to go fast just looking to tune my boat properly. Would I be better off going with a 21p tempest prop?