SEI SE421 Lower Unit – Fits Yamaha 76° V6 200–250 HP (Replaces 65J-45300-21-8D) 12HP Remove the old thermostat and

Remove the old thermostat and gasket/seal from the housing or manifold and discard them

Standard V-belt profile Warranty 1 Year (varies by manufacturer) What’s in the Box

Disconnect the spark plug wires and the negative battery terminal for safety

Release the clips or remove the fasteners securing the housing cover

MD31A 4-Stroke 3831424 Volvo Penta TAMD31A

SEI SE421 Lower Unit – Fits Yamaha 76° V6 200–250 HP (Replaces 65J-45300-21-8D) 12HP Remove the old thermostat andProduct Details This is a complete aftermarket SEI SE421 Lower Unit, engineered as a direct replacement for Yamaha 76 V6 2 Stroke engines, including 3. 1L and 3. 2L models from 1990 to 2005. It features a standard right hand rotation, a 1. 81: 1 gear ratio, and fits models with a 25" shaft length. This assembly serves as a direct interchange for Yamaha OEM part numbers 65J 45300 21 8D and 60V 45300 20 8D, ensuring a precise and reliable fit. Provides