This is the replacement rocker arm assembly for the following O.S. 4-stroke / engines: FS-120 Surpass II with pump, FS-120 Surpass II w/o pump, FS-120 SP, / and FT-300. / / PACKAGE INCLUDES: / One rocker arm / One rocker screw / One locking nut / / REQUIRES: A 1.5mm hex wrench for adjusting. / 4-7-94/eke