I have a 19' North River with 175 Sportjet. I have 135 hours on the motor and have had zero problems. I've found it easy to maintain - similar to an outboard - and to handle very well. The power to weight ratio is excellent and the boat handles like a sports car. Smoke has not been a problem at all. It can take a few seconds to start in very cold weather, but it has always started and run well.