I have the 5HP Lehr. I am running about 50% throttle and getting between 45 minutes to an hour off a 1 lb bottle. I haven't used it that much, maybe 3.5 to 4 hours so it is still in break in stage. I am very pleased with it. I have had a lot of problems with the ethanol with my previous outboard. There is a learning curve with this motor. You have to purge the air out of the line or you spend a lot of time trying to start it. The purge is easy, but they should put a purge button on the motor cowling. You have to take the cover off to purge it. Once purged, put the cover back on and reconnect the bottle and it starts on the first or second pull. It continues to start as long as the bottle is connected. Once you are finished for the day, you remove the bottle and depressurize the line. Next time you connect, you have to purge again. I highly recommend this motor, but Lehr could make a couple of improvements that would solve the purge issue.