Prop for toon

SWR1

Recruit
Joined
Sep 10, 2022
Messages
5
Hello everyone. First time pontoon owner. It's an 18' riveria cruiser and I just put on a sweet running 90hp 1981 mercury that was on a 16' speedboat. It has a 19 prop on it now. What should I get to prop it correctly for my pontoon? I was thinking a 13.75x15. Only has 2 fishing seats in the front and the standard corner couch in the rear and side. So it's not loaded super heavy and 90% of the time it'll only have 2 people on it. Thanks
 

1960 Starflite

Petty Officer 1st Class
Joined
Jun 23, 2011
Messages
281
Just for reference. Mine is 24 foot Harris FloteBoat, 85 hp Mercury 2 stroke. 13.75 x 13 pitch. Two people aboard. 22 mph @ 5400 rpm.
 

legalfee

Petty Officer 1st Class
Joined
May 10, 2018
Messages
342
To answer what prop you need the weight of the boat, WOT rpms and MPH measured by GPS.
 
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