Yamaha 5.6L XTO XF425, XF450 & LF425, LF450 V8 Offshore Deluxe Outboard Cowling Cover - MAR-MTRCV-RX-T0. ⚠️ Important Fit NoticeThis cover is engineered for a secure, snug initial fit, which may cause the impression that it "does not fit." That tightness is intentional, ensuring the best long-term protection.. For a smoother initial installation:. Lightly apply marine wax to the cowling to ease sliding.. Warm the cover in direct sunlight for a few minutes to soften the SurLast material.. Once in