Hello all,<br />I am pretty much new to this section. I blew up a Force 150 last summer and replaced with a 150 Opti. Man is that thing sweet.<br /><br />I started with a 21 pitch prop but think I need to drop down to a 19 b/c the 21 will max out at 4900 rpms when the range is supposed to be 54 to 5700 rpm according to the book. <br /><br />The boat was doing 56 at 4900 (by GPS) which is more than fast enough. Oh the boat is an 89 20ft Arriva. The prop was a Merc Laser II. <br /><br />Would appreciate any opinions.