Sierra 18-9099 MerCruiser Trailering Clips Replaces 817019Q2 These Sierra trailering clips are designed for use with MerCruiser drives. I.D. 34 Length 11-18 Application Info Fits Alpha One Gen I drives from 1983-1991 with serial numbers 0622557 thru 0D469858 Fits Alpha One Gen II drives 1991-Present with serial numbers 0D469859 Up Fits Bravo I, Bravo II, Bravo III drives from 1988-1998 with serial numbers 0B664190 Up Interchangeable with GLM 90070 Mallory 9-79001 Mercruiser Stern Drive 817019Q