like everyone is saying...what is the max rpm now?
On my 24' twin tube pontoon with my new 115 ct merc,, they put a 4 blade 14x14 on it...max rpm was 5800 but with teen age tubers and others on board, especially when turning....My rpm's would drop to 5200+/-....
So, I stuck a 3 blade, 16x12 on...