SE121 Complete 1.36 Ratio Side Water Inlet (Replaces Bravo One®) Mercruiser-Alpha-Gen-I-Complete-Counter-Rotation 81:1 90-421-A30 1998 S250TURW 30

81:1 90-421-A30 1998 S250TURW 30 1

To be safe it is best to remove the top cover and count the teeth on the upper gears

Replaces OE# 3853807

***Applies to all inline 4 and inline six cylinder engines up until and including 1982***

Please see related items below

SE121 Complete 1.36 Ratio Side Water Inlet (Replaces Bravo One®) Mercruiser-Alpha-Gen-I-Complete-Counter-Rotation 81:1 90-421-A30 1998 S250TURW 30SE121 Complete 1. 36 Ratio. Replaces Mercruiser Bravo One 1. 36 Ratio with Side Water Inlets. OE# 5120136KZ Not a replacement for Bravo X,XR or XZ drives. Rated for up to 425HP. Ships in two boxes. Does not include Install Kit or Anode Kit. Please see related items below.