Yamaha Cooling Blower Unit YA2-63541-01-A2. Overview. The Yamaha Cooling Blower Unit YA2-63541-01-A2 is a genuine original equipment manufacturer component designed to assist with proper engine cooling and airflow within the engine system. This blower unit helps move air through designated cooling passages to regulate internal temperatures and maintain stable operating conditions.. Maintaining proper airflow is essential for preventing overheating and supporting consistent engine performance. Ov