i run amsoil 50 to 1 there is also a amsoil thats made that is required to be mixed at 100 to 1. brison uses the hard clyinders. They told me to prop mine for 6500 to 7500 on the ground when i called them over 40 gallons ago. This made me switched out the following 22 x 10 props that i tried:

22 x10 rcs maple 6150-6300
22 x10 futz 6000-6050
22 x10 menz 6400-6500
22 x 10 fortes 6250-6350

Now i only run 21 x 10 or 22 x 8.
the motor did great on those 22 x 10 props but Brison says i could over work the girl

all of the above reading were when i had 2 gallons on the motor

now 40+ gallons
22 x 8 mezn 7000-7250
22 x 8 Mejzlik 7150
22 x 8 Bamula 6930