This pinion gear is compatible with select 50HP, 60HP, and 70HP two-stroke outboard motors.It replaces part numbers 6K5-45550, 6K5-45551, 6H3-45551, and 6H3-45550.Designed for use in lower drive units of compatible engine models manufactured between 1984 and 2006, including series such as 70ETLN, 70ETLK, 70ETLJ, 70ETLH, 70ETLG, 70ETLF, 70ETLD, 70TLRP, 70TRP, P60TLHP, 70TLRQ, P60TLHQ, 70TLRR, P60TLHR, 70TLRS, P60TLHS, 70TLRT, E60MLHT, P60TLHT, 70TLRU, C60ELRU, C60TLRU, E60MLHU, F50TLHU, F50TLRU, P60TLHU, T50TLRU, 70TLRV, C60TLRV, E60MLHV, F50TLHV, F50TLRV, P60TLHV, T50TLRV, 70TLRW, C60TLRW, E60MLHW, P60TLHW, T50TLRW, 70TLRX, C60TLRX, E60MLHX, P60TLHX, T50TLRX, 70TLRY, C60TLRY, C70TLRY, E60MLHY, T50TLRY, 60TLRZ, 70TLRZ, C60TLRZ, C70TLRZ, 60TLRA, 70TLRA, 60TLRB, 70TLRB, 60TLRC, 70TLRC, T60TLRC, 60TLRD, 70TLRD, T50TLRD, T60TLRD, 60TLR, 70TLR, 70TLR_0409, T50LA, T50LA_0112, T50LB, T50TLR, T50TLR_041, T60LA, T60LA_0112, T60LB, T60TLR, and T60TLR_041.This component helps restore standard lower casing drive function.