Re: Mercury 9.9 2 stroke 3 blade vs 4 blade
I got out to the water today with the tach in place. With just me in the boat I got 16mph at 4700rpm, and took about 200yrds to hit plane. When my son, niece, nephew, all about 70# got in with me we dropped to 11mph and 4100rpm, and never got up on plane. Looks like if im going to keep this motor as a spare a new prop might be in order. So back to the original question, should I just stay with a 3 blade and just drop to a 8" pitch, or would I get any benefit from a 4 blade prop. If so should I go 8" or 7" pitch on the 4 blade.
I got out to the water today with the tach in place. With just me in the boat I got 16mph at 4700rpm, and took about 200yrds to hit plane. When my son, niece, nephew, all about 70# got in with me we dropped to 11mph and 4100rpm, and never got up on plane. Looks like if im going to keep this motor as a spare a new prop might be in order. So back to the original question, should I just stay with a 3 blade and just drop to a 8" pitch, or would I get any benefit from a 4 blade prop. If so should I go 8" or 7" pitch on the 4 blade.