Sterndrive Engineering Mercruiser Alpha One Trim Pump AssemblyEvery boater who is passionate about their craft continually looks for ways to upgrade their boat. Enhance your boating experience with tilt and trim pumps. The Mercruiser Alpha One Trim pump is a powerful electro-hydraulic unit that enables boaters to have complete control over the angle of their outboard motor's thrust. This action will, of course, optimize any speed or sport boat's performance in a number of ways.If you already have a trim pump in place but over the years have noticed that while the tilt and trim motor is working, that the engine will not raise or lower, is leaking, or settles down when in a raised position or will not stay trimmed, it is likely time to replace the trim pump. Wholesale Marine recommends the Mercruiser Alpha One Trim Pump Assembly for ease of installation, ease of use, and for safety.Complete Trim Pump Assembly used on Mercruiser Stern drives. (1986 - Present) Use fittings from old pump for quick connectors; Replaces OE# 865380A25; Item is subject to a 20% restocking fee (Boat Covers, Bimini Tops, Outdrives, Drop Ship Items and Special Order Parts)!