Posted by Butch(oh) on January 01, 2021 at 10:58:21 from (72.168.128.55):
In Reply to: Stihl chainsaws posted by Illinois Deere on January 01, 2021 at 10:12:12:
My experience is that the vast majority of saw problems blamed on the mix ratio or type of oil is actually not that at all but from running lean and it is very easy to tell. Remove the muffler and spark plug. Then run the piston down and look at the cylinder wall under the exhaust port, then look at the back side through the exhaust port. Then run the piston up slowly while looking at it from the exhaust port. If the piston and wall is heavily scored on the exhaust side but not the intake side wall is not then the saw was run lean. That being said current saws are tuned to the ragged edge for lean so they pass emissions and the slightest bit of varnish, dirt or old fuel puts them in melt down if run hard. I like to have the pile of money thrown away each year on chainsaws due solely to the use of old stale mix.
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Today's Featured Article - Tuning-Up Your Tractor: Oil, Oil Filter and Air Breather - by Curtis Von Fange. In the preceding articles we discussed some of the various aspects of doing a comprehensive tune up. Hopefully some light was shed on why we do or don't do certain things pertaining to inspections and order of events when doing a tune up. Perhaps some useful reasons were given for why parts fail and what to do about preventing part failure in the future. All these tips will help us think and reason out a problem in order to make our tune up last and, hopefully, keep us from spending extra mone
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