I have a 22 shearwater bay with a 250 and blew the lower unit last week just trying to get some insight to these aftermarket lower units vs a rebuild. I feel these are great replacement lower units … They claim the lower unit break in is just as important as the engine break … The issue at hand is all of our customers are family oriented boat users that drive across the bay to hang out on the weekends. Our new outboard lower units have been very well received in the market with sales exceeding our expectations. Includes break-in instructions. Has anyone bought and used an aftermarket SEI lower unit. This is the SEI lower unit that we put on a customers boat that was a recent purchase. The customers do not put these lower units through "the test" like screamandfly guys do. found some reviews on the internet but most sound like pissed off customers would like to see if there is any happy SEI lower unit … 7) Iboats.com is a loyal SEI … AFFORDABLE PRICING plus the piece of mind of a THREE-YEAR FAULT-FREE WARRANTY makes SEI … Then drain and change the lower unit oil to get rid of metal particles from break in. And varying your speed. Why Buy SEI Yamaha Lower Unit? In the aftermarket sterndrive business, SEI … Mercruiser alpha one gen 2 sei break in procedure Stay under 3k RPM Vary rpm Change lower unit oil after 5 hours Again after 10 hours Warranties Limited to Manufactured Goods: SEI offers a three (3) year fault free warranty on assembled sterndrive halves (upper and lower) and on outboard lower units (OLUs) and a one (1) year … Sterndrive Engineering Yamaha V6 Outboard 2.6L Replacement Lower Unit 2:1, 20" Replacement lower unit for most Yamaha 90 degree V6 2.6L 2-stroke engines with 20" drive shaft. This lower unit is for Yamaha 225 horsepower engine. This is truly a remarkable warranty. (Probably not many other companies in the marine industry can say this right now.) Our lower units are manufactured by SEI (Sterndrive Engineering Inc.), who offers a 3 year, fault free warranty. They build a complete MerCruiser outdrive as well as lower gearcases. Lower unit shifts in forward, neutral and reverse. SEI Marine Products Lower Unit Gearcases. Mariners Warehouse is also your source for sales and installation of several yacht specialty … If I do go with the SEI lower units it would be nice to do the break in for both units at the same time. 2. SEI makes a new replacement lower unit gearcase for Johnson, Evinrude, Mercury and Yamaha outboard motors. It comes with 3-Year Fault Free Warranty. SEI's Lower units come with a three-year, fault-free warranty which means that the lower unit will be covered for any failure that requires the lower unit to be replaced or repaired. You have to break the gears in by running about five hrs. I have a 1991 90 Force (yes I said Force) outboard on my Sakonnet, I bought that engine new, I have maintained it, I completely trust that engine, and have no thoughts of replacing its lower unit.