Prop Question for a Pontoon Boat

[rutcutter]

I have a 2005 Bentley 200 Cruise pontoon boat with a 50hp Mercury 2 stroke outboard. It has the 3 blade stock prop that came with it when it was purchased new. The motor will turn just less than 5000 rpm with this prop and do about 18 mph. The boat comes out of the hole pretty well and planes off good. Can I get any significant speed increase by changing props and if so which one do I need?
Thanks.

 

[kentuckyguy]

Re: Prop Question for a Pontoon Boat

What are the numbers on the prop now??

 

[steelespike]

Re: Prop Question for a Pontoon Boat

Prop numbers appear on the barrel or under the prop nut.