Yamaha 76° V6 Aftermarket Lower Unit – Replaces 200–250HP 2/4 Stroke – Fits 20″, 25″, 30″ Shafts – SEI 90-421

Replaces most Yamaha 76 Degree V6

For application assistance:

Please find your engine model number and call 813-925-7127

The paint color is Black. You can paint it to match.

Not designed for Yamaha F250 four stroke 250 HP motors

For 3.1L&3.2L/Two Stroke V6/20″ Shaft/1.8 Ratio/ RH Rotation

The SE421(90-421-A20) comes with the 1.81:1 Gear Ratio, and a 20″ Drive Shaft
This is a standard right hand rotation gear case.
It replaces gear cases on Yamaha 2 Stroke V6 3.1 and 3.2 Engines with Right Hand Rotation.

Use CRTL+F to Search for your Engine Model Number

For 3.1L&3.2L/Two Stroke V6/25″ Shaft /1.8 Ratio/ RH Rotation

This SE421 (90-421-A25) Replaces the Gear Case
on Yamaha V6 2 Stroke 3.1 and 3.2 Liter Engines
with Standard Right Hand Rotation.

1.81:1 Gear Ratio
25 Inch Drive Shaft.

Use CRTL+F to Search for your Engine Model Number

For 3.1L&3.2L/Two Stroke V6/30″ Shaft /1.8 Ratio/ RH Rotation

SE421 1.81:1 Ratio / 30″ Shaft / 2 Stroke V6 / RH Rotation The paint color is Black. You can paint it to match.

Use CRTL+F to Search for your Engine Model Number

For 4Stroke/25″ Shaft/2:1 Ratio/RH Rotation

The SE421 (90-421-B25F) Replaces Gear Case on
Yamaha Four Stroke V6 200HP – 225HP Engines
with 2:1 Gear Ratio, 25 Inch Drive Shaft and
Standard Right Hand Rotation

Use CRTL+F to Search for your Engine Model Number

For 4Stroke/30″ Shaft/2:1 Ratio/RH Rotation

The SE421 (90-421-B30F) Replaces the Gear Case on Yamaha
Four Stroke V6 200HP – 225HP Engines with
30 Inch Drive Shaft and Standard Right Hand Rotation

Use CRTL+F to Search for your Engine Model Number