I bought a se116 upper in May. I installed it myself and spent the next 3 months changing seals and reinstalling the drive trying to find out why the drive was leaking oil. I had a marine mechanic look at it. There was a depression in the casting around the oil passage way from the upper to the lower keeping the oil seal from sealing properly. I contacted Justin in the Warranty Department, sent the bad unit back, and he sent me a new upper. No problems since. Great job standing behind your product!