I’ve seen several post on props and motor mount position, but none of them helped. I just bought a 2015 RT188 with the Etec motor. It has a Viper 21p prop, mounted in the third hole from the top. It doesn’t matter if there are three people or two people or loaded, unloaded…can only get 42 mph GPS 5500 rpm’s through the nema system connected to my graph. Before I dive into this, does anyone else have the same/similar setup? If so is this all I can expect? What can I do to get the speed up to the numbers I’ve seen on other post? (45-47 mph) Thanks for any info!