Got a good one for ya Willard. A buddy of mine has a 1987 Yamaha 25 hp outboard that he is having trouble finding a lower unit part for. He has been told that the lower unit is actually a Mariner unit, and that the part he needs is no longer available. 87 Yamaha 25m 695 S010155 Part# 811173m Part description - "Protector" I Google'd the part number and it comes up under Mercury & Mercruiser parts, Crowley Marine has a good exploded view of it (item 19) if this helps. Got any ideas where to come up with one? Thanks, WRB.