fits make: Yamaha. year: 1970–1990.

( Manufacturer Part Number: 90170-20137-00 ), ( Part Type: Flywheel Washer Motor )
The Yamaha 90201-21m18-00 Flywheel Nut Key Washer is an essential component for maintaining and servicing various outboard motor models. Designed specifically for Yamaha engines with model numbers 60, 70, 75, 80, 115, 130, and 150, this key washer is an integral part of the flywheel nut assembly, ensuring proper torque and secure fastening of the flywheel nut.
Manufactured by Yamaha, the 90201-21m18-00 Flywheel Nut Key Washer is precision-engineered to provide a perfect fit for the corresponding flywheel nut. The washer features a high-quality, corrosion-resistant material that ensures longevity and durability, even in harsh marine environments. This key washer is specifically designed for use with the following Yamaha outboard motor models: 90170-20137-00 and 90280-05015-00.
The key washer is easy to install and remove, ensuring a hassle-free experience for boat owners and mechanics. With its unique design, the washer helps distribute the torque evenly on the flywheel nut, reducing the risk of damage and ensuring optimal performance of the outboard motor.
In summary, the Yamaha 90201-21m18-00 Flywheel Nut Key Washer is an indispensable tool for maintaining and servicing Yamaha outboard motors. Its high-quality construction, precision fit, and easy installation make it an essential component for boat owners and mechanics alike, ensuring the longevity and optimal performance of their Yamaha outboard engines.
The Yamaha 90201-21m18-00 Flywheel Nut Key Washer is a specific tool used for outboard motors, specifically models 60, 70, 75, 80, 115, 130, and 150. It's designed to make the installation or removal of the flywheel nut easier.
Pros of buying this part:1. Ensures proper installation: The washer helps in evenly distributing the load to prevent the flywheel nut from stripping or damaging the engine.
2. Saves time and effort: The washer makes the nut easier to turn, reducing the force required and thus saving time and effort.
3. Compatibility: The washer is specifically designed for Yamaha outboard motors, ensuring a perfect fit and function.
Cons of buying this part:1. Cost: The washer might seem like an unnecessary expense for some, as it's a small part. However, its importance in the proper functioning of the engine should be considered.
2. Availability: It might be difficult to find this specific part in local stores, requiring an online purchase.
In conclusion, while the Yamaha 90201-21m18-00 Flywheel Nut Key Washer is an additional cost, its role in ensuring the proper function and longevity of the engine makes it a worthwhile investment. If you own a Yamaha outboard motor within the specified model range, it's recommended to keep a spare washer in your toolkit for future maintenance needs.
From my research, they will fit many newer Yamaha 2-stroke 4-stroke outboards.
Removed from a low hour Yamaha 60hp outboard.