My Tornado's .18 was super tight at first so I dropped four small drops of Marvel Mystery Oil down the glow plug hole and a couple down the carb and spun the flywheel a few times and it smoothed out quite a bit but kept the pinch. Still has great pinch,I pop the fuel line off the pipe and blow in it till fuel hits the carb inlet,and it starts in a couple pulls and idles pretty smoothly (although I've been working so much I still only have 1/2 a quart through it lol). If the weather is good tomorrow (and its been super whacky lately) I'll get the rest of that quart through it for sure! I love that mystery oil,some say it gums up after a LONG period of time but I dont leave them sitting that long and it works great for air filter oil and after run oil and it smells really good (not brave enough to taste it though ).