Genuine OEM trim/tilt relief-valve kit from Mercury / Quicksilver. This kit is designed for the hydraulic trim/tilt system and ensures the correct pressure relief function — protecting the tilt cylinder, pump and ram from excessive load or binding in operation. Features: Direct OEM replacement for Mercury part # 893929A01 Factory-specified kit for trim/tilt systems — maintains proper hydraulic relief pressure Applies to 3-ram tilt/trim systems used on many Mercury outboards and sterndrives Manufactured to Mercury’s original fit, form and function May Fit / Common Usage:This kit is documented for use in 2- and 4-stroke outboards and sterndrives that employ a 3-ram hydraulic trim/tilt system. Superseded part numbers include 813442A2, 811618A1, 811618, 812843A1 and 99660A1. Fitment must be verified with engine model year, serial number and whether the vessel uses a 3-ram system.