My question on clearance was based on useing the sierra gear for this plane . I bought the gear and shorter then typical standoff scale /coorect side .
I went for the magnum 180 4 stroke , I think I am crazy and been an os /saitio guy fater having problems with the Magnums in the 91 size .
THis will either be my last magnum or it will get me back into the brand. At $280 vs $449 I figured it was one more try .

Hot rod , great point on the torque comment , I have had many rudder battles with 91 and 125 4 strokes with large props