I installed them about a year ago after getting weary of changing Tides seals. It is nice having a dry bilge again. The cost to install was no more than a Tides seal replacement.
87 Sea Ray 300 Weekender
88 Sea Ray 300 Weekender
55 Lone Star Cabin Cruiser
Engines
350 Mercruisers
Did you use the one with the mechanical seal. The o-ring that stays in contact with the shaft? I was looking at the cheaper version for a project boat.