I use the 1550 gas on the 3pt V rake all summer. I raked some today and was coming home,the darned thing started bogging down like the hydraulics were sticking or something. I dropped the rake a little and raised it back up,wiggled the remote levers and it kept it up. Then it started blowing smoke out the blow by tube. I idled it down some,the lugging let up and the smoke cleared. I got it home and shut it off. Left it about 20 minutes and started it back up. No smoke and sounds good,but I took the rake off. I'll finish with the 1850 the rest of the season I guess. I think that engine had better go upside down on the stand before I press my luck and run it anymore.