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

This results in a longer operational life

This is a universal-fit aftermarket component and does not directly replace a specific OEM part number

Notes OMC Cobra 2

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