|
Hi Stosh, There is some discussion about this a few posts down. I remember the unmodified 2-cycle motorcycles I've worked on being in the 90 to 100 PSI range. On the other hand, Bill says in his post he has a saw with 60PSI that runs fine. The oil mix depends on the oil you're using. The traditional ratio with conventional 2-cycle oils is 16:1 which is 1/2 pint of oil per gallon of fuel. There are "special" 2-cycle oils that are mixed at 80:1 or more. There could be something better, but I've had no problems with the oil Stihl sells with their name on it. Based on his observations, my friend who works on small engines recommended it to me. I have an old Sears saw, a larger Stihl saw, and a trimmer that have many hours on them using this oil, and I also use it in another trimmer and a leaf blower. I may get some disagreement on this, but I would stay away from the synthetic 2-cycle oils. The advantage of these oils is that the engine can be made to produce more power, and spark plug life is improved. But among the problems are shorter engine life and reduced corrosion/rust prevention. I've seen the results of these problems first hand, and have discussed this with two manufacturers of synthetic 2-cycle oils. One of them told me that using their synthetic oil, an engine lasts 60% of what it would with conventional mineral oil. Mobil 1 has finally reached a point of being the best oil there is for some 4-cycle applications. But unless you are racing your chainsaw, don't use synthetic oil in it...Al English
|
