I had a 26 foot Century with a pair of these engines. Overall, they performed very well. They are thirsty but ran just fine on regular 87 octane gas. The only problems I had over a 7 year span was one had a "ghost" problem with blowing the main 30 amp fuse every few years. Since the problem was so intermittant, it was hard to find and I simply carried extras and replaced. However, if it was replaced right away, it would blow again. Wait few hours and the problem went away. I came in on 1 engine those couple of times. The other problem was with the sensors on one engine. They had to be replaced. Otherwise, they were always reliable with lotsa power. They like to be run so don't baby them. I would give them high marks for reliability and power. Not so high for efficiency but such is life with 2-stroke engines. Hope this helps.
Blackbird