Yamaha 4.2L V6 F225 F250 & F300 Offshore Deluxe Outboard Cowling Cover - 2019 and Earlier - MAR-MTRCV-F4-2L. ⚠️ Important Fit NoticeThis cover is designed for a tight initial fit to ensure maximum long-term protection. This may cause it to feel like it "does not fit" during the first installation.. For best results:. Apply a light coat of marine wax to the cowling.. Warm the cover in direct sunlight for several minutes to make the fabric more flexible.. Once installed, the cover will naturally s