Water Tube Coupling for Alpha One Gen II Mercruiser
Replaces 816597A1 & Sierra 18-3151
2 O-Rings and 1 Coupler
- Water Coupling Assembly
- Replaces Mercury 816597A1
- Replaces Mallory 9-78110
- Water Tube Coupling
- Alpha Gen II 1991-Up
- Mercury 3.0L
- IF you have any questions as to the fitment of our products please consult your local dealer before installing any parts yourself.