| OEM | 61N-11631-00 |
| Vehicle Type/Engine Model | Y30HP |
| Cylinder Diameter | 72mm |
An outboard motor lives a hard life. Saltwater. Humidity. Wide-open throttle for hours. The piston is at the center. It ...
READ MORE| OEM | 61N-11631-00 |
| Vehicle Type/Engine Model | Y30HP |
| Cylinder Diameter | 72mm |
| OEM | 6F6-11631-00 |
| Vehicle Type/Engine Model | 40HP E40G'19(6F6K-1118772) E40J'19(6J4K-1075549) |
| Cylinder Diameter | 78mm |
| OEM | 6L2-11631-00-97 |
| Vehicle Type/Engine Model | 6L2 |
| Cylinder Diameter | 67mm |
| OEM | 664-11631-01 |
| Vehicle Type/Engine Model | Y25HP |
| Cylinder Diameter | 67mm |
| OEM | 677-11631-00 |
| Vehicle Type/Engine Model | 8HP |
| Cylinder Diameter | 50mm |
| Pin Hole | 12mm |
| OEM | 6E0-11631-00-98 |
| Vehicle Type/Engine Model | Yamaha 4/5HP |
| Cylinder Diameter | 50mm |
| OEM | 6G1-11631 (plug) 6G1-11603-00-00 (ring) |
| Vehicle Type/Engine Model | Yamaha 6/8HP |
| Cylinder Diameter | 50mm |
| OEM | 6E3-11631-00-98 |
| Vehicle Type/Engine Model | Yamaha 5HP (same appearance as Suzuki 8HP) |
| Cylinder Diameter | 54mm |
| Pin Hole | 12mm |
Our outboard engine pistons, designed for Yamaha engines, are constructed from high-strength aluminum alloy and feature advanced heat treatment, resulting in a lightweight design with high-temperature resistance. Precision machining and surface treatment ensure precise piston dimensions and excellent wear resistance, maintaining efficient combustion and stable power output. Whether used in leisure boating, fishing, or long-distance ocean voyages, these pistons provide reliable power and extend engine life.
Ruian Zhengji Motorcycle Parts Co., Ltd. is a custom Outboard Engine Pistons for Yamaha Series manufacturer and OEM Outboard Engine Pistons for Yamaha Series factory, specializing in the research, development, production and sales of pistons for automobiles, motorcycles and outboard engines. In addition to offering standard piston products, we focus on the development of motorcycle modification parts and customized products to meet the diverse needs of our customers.
We possess a complete production chain from blank casting to finished piston manufacturing, equipped with over 200 advanced production machines, including more than 80 high-precision CNC lathes. During the piston manufacturing process, we employ both casting and forging techniques to ensure durability and performance. The forging process provides pistons with greater strength and wear resistance, while the casting process offers higher production efficiency and flexibility.
An outboard motor lives a hard life. Saltwater. Humidity. Wide-open throttle for hours. The piston is at the center. It ...
READ MOREAn engine is only as good as its parts. The piston is one of the very critical. It moves up and down thousands of times ...
READ MOREAn outboard motor lives a hard life. Saltwater. Humidity. Wide-open throttle for hours. The piston is at the center of i...
READ MOREOff-the-shelf pistons work fine for stock engines. Rebuild a factory engine, and standard sizes fit. But modify the engi...
READ MORERuian Zhengji Motorcycle Parts Co., Ltd. is a specialized manufacturer engaged in the research, development, production, and sales of pistons for automobiles, motorcycles, and outboard engines.
Cell phone:+86-18858762999 / +86-18858760666
Landline:+86-0577-65108168 / +86-0577-65106111
Fax:+86-0577-65508599
WeChat:+86-18858760666
Email:jinzixiong1999@163.com
Add:No. 21, Jinfeng Road, Cenqi, Tingtian Town, Ruian City, Zhejiang Province, China





