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Message: [QUOTE="omrik88, post: 1376060, member: 116035"] [b]some more questions...[/b] Thank mudpack and Joburble, I'm still learning stuff, so i don't know all the terms. got the Clymer manual,it's very usefull. *I'll try that silicone spray, is there a certain type that i should look for? * so i actually need to put 3% instead of 2.5% of oil? That's a bit confusing, cause it already smokes alot. I will not reduce the oil - i know that's not something to play with on a 2 stroke engine.I thought an old engine might need slightly less oil (?). I'm guessing the Carb is the bigger issue here. *About "jetting", i'm not sure what that term means exactly, my pilot jet is no. 48(pretty sure),the main fuel jet says 36. The choke&idle adjust are using the same mechanism - up&down is Choke and turn right&left is Idle adjust (this knob/screw is on the left side,so it's hard to tune it). Does jetting mean that i could change the pilot jet to different sizes/numbers to get the right mixture? (along with other variables like: oil/fuel ratio,air screw adjust etc.) *About the air screw - i turned it according to the manual, but since this is not a stock carb and not a stock cylinder, maybe the tuning should be different. Could this also be part of the problem? I'm just trying to think of all the options... will post some pics later. Thanks a lot guys! Omri. [/QUOTE]