Hi fellow builders,
Hereby a little update:
I bought 2 other props; 7 7/8 x 7.5 honda 5hp prop
One lathed down to ±140mm
I still have the 7.25x5, I just lathed the hole to 12mm to fit on my new shaft.
I will still use my reisenauer 6:1
I will use my new Typhoon HET 700-98-670
Saturday I will test the 3 different props with different motortiming and measure the thrust and amperage. Hopefully make another run when everything looks safe