Tohatsu 4 to 6 hp Propeller change?

[Dexter Morris]

Sorry to bring up this subject but I searched and couldn't find an answer to my prop question

I installed a 6hp carb on my 2008 4hp but what about the propeller. Should I change to a different size. Tohatsu lists 5 on their site. It is installed on a Avon 280AF. I'm looking for max speed with one adult onboard.

http://www.tohatsu.com/accessories/p...peller Chart

Thanks