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Yamaha Complete Lower Units

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SE405 (Replaces all Yamaha V4 2-Stroke and some 4-Stroke ) — SE405 (Replaces all Yamaha V4 2-Stroke and some 4-Stroke ) $1,045.00

SE416 (Replace some Yamaha V6 2 & 4 Stroke) — SE416 (Replace some Yamaha V6 2 & 4 Stroke) $1,045.00

SE418 C.R. (Replaces some Yamaha V6 2 & 4 Stroke) — SE418 C.R. (Replaces some Yamaha V6 2 & 4 Stroke) $1,245.00

SE421 (Replaces some Yamaha V6 2 & 4 Stroke) — SE421 (Replaces some Yamaha V6 2 & 4 Stroke) $1,045.00

SE 428 C.R. (Replaces some Yamaha V6 2 & 4 Stroke) — SE 428 C.R. (Replaces some Yamaha V6 2 & 4 Stroke) $1,245.00

SE 422 (Replaces some F250) — SE 422 (Replaces some F250) $1,245.00

SE 429 (Replaces some LF250 C.R.) — SE 429 (Replaces some LF250 C.R.) $1,445.00

SE404 (Replaces some Yamaha 2-stroke and 4-stroke 75-100 HP — SE404 (Replaces some Yamaha 2-stroke and 4-stroke 75-100 HP $1,045.00

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©Copyright 2025. Sterndrive Engineering Inc. All Rights Reserved.

The three year fault-free warranty covers any damage to the drive that requires it to be repaired or replaced including failures resulting from lack of oil, fishing line, impact, neglect, and other abuse. Sterndrive Engineering, Inc. (SEI) manufactures a stern drive designed to replace Mercury Marine's MerCruiser®, Alpha One®, R, MR, Gen II and Bravo One® stern drives. MerCruiser®, Alpha One®, Gen II, R, MR and Bravo One® are trademarks of the Brunswick Corporation. SEI has no affiliation with the Brunswick Corporation. Consequently, any warranties governing products manufactured and/or sold by Brunswick Corporation will not apply to products manufactured and/or sold by SEI, or to products damaged due to the operation of an SEI product. Sterndrive Engineering, Inc. is not affiliated with Mercury®; Yamaha®; OMC® or their products. All reference to their trademarks and trade names are the property of the respective owners.