SEI Yamaha Lower Unit SE421 (Replaces some Yamaha V6 2 & 4 Stroke)Replaces most Yamaha 76 Degree V6 The paint color for all lower units is transitioning to black as inventory becomes depleted. Therefore, color may vary depending on product availability at time of order Not designed for Yamaha F250 four stroke 250 HP motors For application assistance: Please have your engine model number available and call 609 515 5486 were happy to verify this is the correct lower