Piston Kit for 65W-11631-00-96 Yamaha 40HP Outboard Motor Engine Rebuild & Maintenance

Certification: ISO9001 factory production; CE documents available upon request

Real Product Photos: Full piston kit overview, piston ring close‑up, Yamaha 40HP outboard cylinder mounting reference picture

This heavy‑duty aftermarket standard‑size piston kit serves as a dependable OEM‑equivalent rebuild spare for Yamaha 40HP two‑stroke outboard motors. It cross‑references OEM part numbers 65W‑11631‑00‑96, 65W‑11631‑00 and 65W‑11631‑01‑00, widely used for engine rebuild and routine maintenance projects.

The piston body is precision cast from thermal‑resistant high‑strength aluminum alloy. The piston rings adopt quenched alloy steel surface treatment. This piston kit delivers excellent heat‑resistance, wear‑resistance and anti‑fatigue performance. It withstands cyclic combustion pressure, high‑temperature thermal shock and damp, salt‑rich marine surroundings, maintaining stable compression performance over long‑term boating operating hours.

Installed inside the engine cylinder, this complete piston kit converts combustion pressure into driving power. Piston rings maintain cylinder compression, control blow‑by gas and reduce oil consumption.

 Qualified piston‑kit components eliminate compression loss, minimize oil burning and restore proper engine power output.

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