We had a customer that just had his merc lower rebuilt by another local shop and after about 2 hours of use his lower gear set was pushed out the sides of his lower gear housing.......He had just spent about $2000.00 for that mess.....He asked what I could do for him and if we had a used motor that he could buy or ??..... I explained to him that I could supply a complete NEW lower gear case with a warranty installed and ready to go for less that $1500.00 including a new shift shaft and lower complete.....He did not believe me and when I showed him the SEI lower he jumped on it......He has put over 30 hours on his new unit and could not be happier...........Thanks SEI