Mercury 4-Cylinder 4-Stroke Outboard Cylinder Heads

Explore our selection of remanufactured 4‑cylinder 4‑strokeMercury & Mariner outboard cylinder heads at OBParts. Our remanufactured cylinder heads have new valve seats, seals, and pre‑adjusted valves to ensure reliable performance. Whether you’re rebuilding, repairing, or upgrading your engine, our cylinder heads come with included head gaskets, a limited one‑year warranty, and optional extended coverage. Plus, there’s no extra core charge—we provide a return label, and eligible cores yield a refund upon inspection. Enjoy fast domestic and international shipping so you can get back on the water quickly.