Originally Posted by
Lech91
Ok, here's my update so far: i changed the spark, rebuilt the engine and sealed leak proof, but still overheats, i leaned out both needles farther than the factory defaults, by 1 turn; set the idle screw for 1 mm gap; there are two things that mainly concern me now: the car goes forward without pulling the trigger with this idle setting, and if i rev down it turns off; and the other thing is that the muffler still spits oil and sometimes gas, is that normal? as i learned it should do that only during the break in process
Overheating is almost always due to too lean of a setting. Curious what you consider overheating? How are you measuring engine temperature? 1mm idle gap is most likely too big and possibly why your car is moving at "idle". Ensure the throttle is not closing further when you hit the brakes. If it is, you need to adjust your linkage or throttle trim so it closes to be idle stop when the throttle is neutral. If the linkage is set correctly and the throttle isn't closing further with the brakes, then check your clutch springs. A broken clutch spring will allow the clutch to grab even at idle.
With the exception of gasoline engines, all glow plug engines will spit oil from the exhaust. You will see more oil come from the exhaust using high oil fuel - I think 16% oil for regular running is too much. I wouldn't use more than 12% oil fuel. 20% nitro is fine though.