Re: 2nd opinions on prop selection

[Don]

Yeah, most pontoon boats have a certain "hull speed", trying to push past this barrier usually results in engine lugging, ventilation, and just about most other unwanted performance headaches. So, it seems like your rig is comfortable at about 16mph, I guess I wouldn’t try to push it much faster.
I remember my old 24′ pontoon, more fun than any other boat I’ve had, especially when playing Rodney Dangerfield pulling into the snooty sailing clubs asking about becoming a member! In any event, the old 73/74/75 65/70hp was comfortable at about 3/4 throttle with a big ol 13" prop, the engine wasn’t struggling and I’m guessing we were at about 15mph. Pushing the throttle down farther only resulted in ventilation, engine lugging, and erratic ride.
Most normal propping theory goes out the window when trying to deal with a pontoon boat, so keep experimenting.