Search

That 13/20 is too much prop for your setup. Switch to a 13/18 and you will pick up 200-300rpm and 2-3mph.

Your water temps change that drastically day to day? And you've verified air density altitude did not change between those runs on different days? I'm not suggesting you're wrong or that it's not...

Reaper, can you share some more info about your setup? Your limit may be 8600, but what is your running RPM? Your prop could be holding you back. My friend was hitting 86mph peak and 84mph...