I have an SEI and I have had to use the warranty with no problems at all. I dont regret the purchase. Some points. Follow break instructions, do plenty of forward and reverse swift changes meaning at idle and firm during break in. Let it run in reverse a little. The warranty is voided under any competition format. Such as dog fights, tournaments. If it fails and you say hey it failed during a dog fight, they will say sorry read the terms. Dont get me wrong they were great with my replacement. Mine had vibration, severe and I know where that was headed so it hadnt really failed yet and it was 60.00 to get me a new one in less than 10 days. You will have to mount drive shaft, water pump assembly.