Premium Mercury & Mariner 2-Stroke 2-CYL Powerhead Rebuild Kits

Our 2-cylinder outboard powerhead rebuild kits are specifically tailored for Mercury and Mariner 15-25 HP engines with the Mercosil blocks.

Each kit includes:

• Two pistons
• A complete gasket and seal kit
• Upper, center, and lower main bearings
• All rod bolts and bearings.

Available for standard-size pistons or a range of oversized options (.020, .030, and .040), OBParts leverages decades of expertise sourcing high-quality outboard rebuild components for dependable performance.