0393942 O-Ring Kit — OEM Johnson / Evinrude / OMC

The O-Ring Kit 0393942 fits genuine factory trim & tilt hydraulic assemblies for Johnson, Evinrude and OMC outboards. 
It contains most of the O-rings required to service the unit, though some users report that the kit is missing 6 O-rings,
When internal seals wear out, you risk hydraulic fluid leaks and tilt/trim failures. The O-Ring Kit 0393942 restores seal integrity and helps prevent system malfunctions.
You’ll find this kit used across many engine models—especially 60-300 HP units from the 1980s and 1990s. 
Installation involves draining the hydraulic system, removing the old O-rings, cleaning all contact surfaces, and installing the new rings in the correct locations. Use the correct lubricant or fluid recommended by the manufacturer.
Thanks to this kit, you’ll maintain smooth tilt and trim operation, reduce risk of leaks, and preserve overall outboard reliability.
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