fits make: Yamaha.

( Part Type: Piston ), ( UPC: 371116310596 )
The Yamaha 371-11631-05-96 and 421-11631-03-96 Standard Pistons are engine components specifically designed for Yamaha outboard motors. These pistons are meticulously crafted to ensure optimal engine performance, reliability, and durability.
The 371-11631-05-96 piston is a part of the larger assembly for larger Yamaha outboard engines. This piston features a forged aluminum alloy construction, which provides the necessary strength while keeping the weight relatively low. The piston skirt is designed with a full-length oil ring to minimize oil consumption and ensure proper lubrication. The piston crown is engineered for efficient combustion and features a modern design to accommodate advanced engine technologies.
The 421-11631-03-96 piston, on the other hand, is designed for smaller Yamaha outboard engines. Similar to its larger counterpart, this piston also boasts a forged aluminum alloy construction for durability and strength. It comes with an optimized piston skirt that ensures a snug fit in the cylinder and reduces friction for smoother engine operation. The piston crown is designed to work efficiently with the latest engine technologies, ensuring excellent combustion and power output.
Both pistons come with the necessary hardware, including piston rings, clips, and other components, for a seamless installation process in your Yamaha outboard engine. These pistons are interchangeable with genuine Yamaha pistons, ensuring the same level of quality and performance.
In summary, the Yamaha 371-11631-05-96 and 421-11631-03-96 Standard Pistons offer excellent engine performance, reliability, and durability for Yamaha outboard motor users. Their forged aluminum alloy construction, optimized piston skirts, and efficient piston crowns make them an excellent choice for maintaining or upgrading your Yamaha outboard engine.
1.1. Designed specifically for the Waverunner FX SHO model, ensuring a perfect fit and optimal engine performance.
1.2. Manufactured by a reputable brand, Yamaha, known for its high-quality marine parts.
1.3. Can enhance the overall power output and efficiency of the engine.
1.4. May improve the longevity of the engine by reducing wear and tear.
Cons:2.1. May require additional labor and installation costs, as it's not a simple bolt-on upgrade.
2.2. Depending on your location, you might need to order from a distributor, which could result in a longer wait time.
2.3. The price point is relatively high compared to aftermarket alternatives, which could be a deterrent for some.
2. Yamaha 421-11631-03-96 (Standard Piston for Waverunner FX NITRO): Pros:3.1. Designed specifically for the Waverunner FX NITRO model, ensuring a perfect fit and optimal engine performance.
3.2. Manufactured by a reputable brand, Yamaha, known for its high-quality marine parts.
3.3. Can enhance the overall power output and efficiency of the engine.
3.4. May improve the longevity of the engine by reducing wear and tear.
Cons:4.1. Similar to the Yamaha 371-11631-05-96, it may require additional labor and installation costs.
4.2. Depending on your location, you might need to order from a distributor, which could result in a longer wait time.
4.3. The price point is relatively high compared to aftermarket alternatives, which could be a deterrent for some.
Ending Conclusion:Both Yamaha 371-11631-05-96 and 421-11631-03-96 standard pistons offer similar benefits, such as improved engine performance, efficiency, and longevity. However, they also share the same disadvantages - additional labor and installation costs, potential longer wait times due to order processing, and a relatively high price point compared to aftermarket alternatives.
If you are looking for an OEM (Original Equipment Manufacturer) solution, these pistons are an excellent choice. However, if you are open to aftermarket alternatives, you might find more affordable options that provide comparable performance. Ultimately, the decision depends on your budget, installation capabilities, and preference for OEM components.
Part number 371-11631-05-96 / 421-11631-03-96. See all photos.