Aluminium screw (With breekpen slot) Pin Drive (7 PITCH) SOL3011-090-07-P if the outboard, or not to correct RPM comes from inboardmotor bv. 5700 rpm 6000 rpm and the engine makes but then it is advisable to one pitch to go up. When too much rows of bv. 6300 rpm it is advisable to have one pitch down.