my rpms only get 3600 out of water....and the best i can get in the water is 3360 with just me....add 1 or 2 people and it only drops to 3420....pretty mechanically inlcined just afraid to hurt the motor by over revving....can/how do i tweak the throttle to reach atleast 3600 in the water....would mods be relevant? such as exhaust or carb? if i could get 3600 it would push 20mph open water by myself...get 18 now....just doesnt sound like it is reaching full potential in rpms....any advice would be appreciated thanks..