RE: OS .75AX users please post prop sizes
well as far as the "designed to run bigger props" comment goes for the 55AX, Im running mine all stock, 15% omega fuel with a 9x9 APC at 15400 rpm and 9x8 APC around 16K rpm.. Very nice performance IMO without a tuned pipe or a tuned muffler..
Ive also got the 120AX, but im running it at 9100 rpm with a 17x6 JXF for 3D. Note that this engine is rated max HP @ 9000 rpm and max usable advertised as 9500.
Now the 55AX is advertised as 17k and 75AX also 16K. So I see no reason not to run smaller props on the 75AX such as 10x9 11x8 12x7 or 13x6 to gain RPM and total power output..
15x6 APC on a .75 2 stroke?? come on!..