Centurion Fi21 - works great/worthwhile upgrade
This prop is a replacement for the ACME 1235 (which came stock on the 2018 Centurion Fi21 with the 409 engine). The 2277 prop is only a half inch in diameter larger. It has a slightly faster pitch. Larger prop = less cavitation on acceleration. This prop is not a huge difference on paper. However, it dropped my surfing RPMs down to 3600 vs. 4000 with the stock prop (1235). Cruise speed didn't change noticeably. I'm at sea level by the way. I got less cavitation and still as good of a hole shot as the stock prop. Great upgrade. If you're going to high altitude though - I've heard that the 16x13 prop would be the choice.