A RINGS-Standard by Mercury. The 2.0 LITER V6 (18-3921) is a cylindrical engine component that moves back and forth in the cylinder bore forces generated during combustion. The combustion chamber has...
The Sierra PISTON RING SET (18-3902) is compatible with Mercury marine applications. Mercury Marine 39-45155A12, 39-78816A12, and Mallory 9-54217 are interchangeable with this part. This...
$68.11
$62.39
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