Pinion gear part number 688-45551, also referenced as 688-45551-00 and 688-45551-00-00.This replacement pinion is compatible with 2-stroke outboard engines rated at 75HP, 85HP, and 90HP, including models designated T85.It fits the following lower drive or lower casing drive assemblies: 1989 CV85ELF, 1990 CV85ELD, 1990 CV85ETLD, 1991 C85TLRP, 1992 C85TLRQ, 1993 C85TLRR, 1994 C75TLRS, 1994 C85TLRS, 1995 C75TLRT, 1995 C85TLRT, 1995 E75MLHT, 1996 C75TLRU, 1996 C85TLRU, 1996 E75MLHU, 1997 C80TLRV, 1997 C90TLRV, 1997 E75MLHV, 1998 C75TLRW, 1998 C90TLRW, 1998 E75MLHW, 1999 C75TLRX, 1999 C90TLRX, 1999 E75MLHX, 2000 90TLRY (C90TLRY), 2000 C90TLRY, 2000 E75MLHY, 2001 90TLRZ (C90TLRZ), 2001 C90TLRZ.