There is not an engine anywhere that is more reliable than Yamaha's 150 VMAX. I have been with Yamaha since the mid 90's and have sold hundreds of them and have NEVER had a VMAX 150 come back with a major problem. I may have 3 come in tomorrow, but haven't seen one yet. If I were going to buy myself an engine that I wanted to last forever, I would buy a VMAX 150 and never look back. Just my .02