SEI Marine Products

90-421-A20

SEI MARINE PRODUCTS - SE421 V6 2 Stroke 76 Degree Gearcase 1.81 Gear Ratio 20 Driveshaft

Engine

Our SE421 replaces most Yamaha V6 76 Degree Standard Rotation 2 and 4 stroke lower units.
Our SE421 and SE428 will not work on any 250 HP 4 stroke engines.
The SE421/SE428 gearcases are not designed to replace units which have a low water pickup or come equipped with a 1.75 gear ratio.
This lower unit typically ships within 24-48 hours.
Replaces OE #: 66K-45300-12-NA

All of our lower units come with a three year fault-free warranty. They are manufactured in Oldsmar, FL, built up to OEM specifications and they are an affordable, high quality alternative.

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