I need to know what kind of oil, how to mix the oil and gas, how much to mix, and if they need mixed separately. Please answer ASAP!
When you buy the 5L of unleaded Petrol (the same as a car uses), mix with the recommended amount of 2 stroke Stihl oil as marked on the container that the Stihl 2 stroke oil comes in.
Do not use any make of oil other than Stihl or Husqvarna 2 Stroke. I have come across so many people who have tried to cut corners by buying cheaper oil. If you are asking the question you are obviously not going to use the saw to cut down hundreds of trees so for a few pence/cents more for each fill, give the saw the best chance to last.
I always mix the can with 2 stroke oil as soon as I arrive home from the petrol station and MARK the can very obviously as 2 stroke. If you don't use the mixture within 1 month, it is a good idea to use it up in your garden mower. That is as long as the mower does not have a catalytic converter. It will work fine on the very weak oil mixture that modern saws require.
SOURCE: keep burning up piston on
It sounds like you are running lean. Not a lean oil/gas mix but a lean Air/fuel ratio. This engine runs hot as a high performance engine. any air leaks such as crank seals, manifold gaskets or muffler gaskets can give you too much air for the fuel coming in.
Secondly from the fuel side:
Ethanol (curse it) combines with oils that have no nondispersants making a white chalky poweder in the fuel system causing less fuel to mix with air. any blockage or pin hole leak can cause less fuel to be brought into the engine thus less cooling and lubricating.
Your carburetor and fuel filter need to be serviced and adjusted correctly or they will affect the mix.
When done the engine should run no faster than 13,000 rpm top no load speed.
This engine should idle smoothly at 2,500 with no more than 150 rpm change
if the speed is not as listed above when the rebuild is done you need to go back into the machine.
Call up a shop like www.arcolawn.comto get a EDT8 tach. it is well worth the money.
good luck
Joe
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