Sierra 18-3902, Piston Rings, Standard Bore Inline, 3 Rings
Replaces OEM part #
- MERCURY MARINE 39-78816A12
- MERCURY MARINE 39-45155A12
Bore Size: 2.875/STD
This product ships in 1 business day.
Add to Cart and enter your Postal Code to determine the shipping charges.
Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies