i have a chris craft scorpion just purchased and the original owner told me he had damaged the original prop and just installed a prop he found that would work but he advised me i would need to change prop for better performance..presently the max rpms is running 4200 and max speed of 33 mph as per the gps..i'am looking to get 40-45 mph if possible..the motor is a i/o 350/260hp and the outdrive is a cobra 280..i have also ordered a k@n airfilter 4inch tall type because i'am the factory looks very restrictive and i like can get more power with large air filter for more air intake..i work in the auto ind so very familiar with a 350 engine but mot at all familiar with outdrives or props..need help picking the corrrect prop ie number of blades,size pitchand etc...looking for more top speed
