I just purchased a 2012 tracker boat with a 40 hp mercury 4 stroke motor. I want to get better prop for it and use the one on it for a spare. The one on it is a 13 x 26 2.00:1 I want better performance like a 4 blade prop but I don't know what to get or the size as I knew to a big boat if someone could help me I would really appreciate it thanks