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Evening from the saddle ,
Anyone have experiance with Piranha Propeller http://www.piranha.com
I have a 2008 sport 130 number on prop 73138A40P14 mercury OEM on the 40 hp EFI merc, Cant find data in owners manuel, mercury manowner book or other data to see what is current pitch diameter and what available?

I have 500 lbs gear people on the 2008 sport 130 and CAN Not get on plane WOT 4000 and plowing, maybe once everyone shifted to bow and 4 min later started to plane the best I got was 4400 WOT and 25 speed

Using boat in fresh water 1500 AGL lake