Re: OK, thanks guys and gals!
Fog Tanner
>Carol, sounds like you are on your way. I have a Stihl 290 and read the manual too. Setting the brake and use of nonflammable cleaning fluids are more to do with product liability than anything else. I peronallydon't use the brake when starting as I want it to be there when I need it. Also I don't want the initial load on the engine and I am carefull about the blade location relative to other objects. But, that is a personal preference.
The heart of your saw is the engine, the rest of it is just an addon. They elude a little in the manual about care, but they don't tell you the whole story. You should clean the saw up after every use to get any oil or fuel residue off. This will collect dirt and eventually find its way into either the chain oil or fuel tank. Also the grime that acumualtes is an abraisve compund which doesn't do the finish any good. Same with the bar.
When you first start using the saw and it is cold, let the engine warm up for a minute or two. It has nothing to do with lubrication as that is in the fuel mix and pumped through the crankcase, it is about letting the cylinder and rings expand to their operating size/deminision. All engines have an operating temperature at which they run the best. Once it is warm, you can usually start it and go.
I talked to a tech at Stihl about the engine. I was having some problems with mine and needed some information. At first he deferred me back to the dealer, but I mentioned that I dealt with high performace 2 cycles for almost thirty years, and the story changed. We discussed the carburetion system, and I found that the settings are EPA mandated. The engine comes with the fuel mixture setting on the verge of going lean. That causes the engine to run a little hotter and in theory burn cleaner. It also causes the engine to wear out sooner and really doesn't have a cleaner exhaust. He said the engine would make more power, turn more RPMs, and last longer if the setting was a little richer. You can guess what I will be doing to the setting on mine.
When you are through, it is best to let the engine idle a few minutes to let the fan cool the cylinder down a little. You really want to avoid any sudden changes, the cylinder really won't appreciate it and will let you know. The difference between a round cylinder that seals and one that leaks is only .0004 of an inch. So, you want to give it every chance it can get.
Another thing they don't tell you in the book. If you are storing for a long period of time and have drained the fuel and run it dry, get some Marvel Air Tool oil, pull the spark plug and put about ten of fifteen drops in the cylinder and pull it through with the plug out - slowly. Put the plug in and you are set for the winter. When you go to use it again, pull the plug, put a rag over the sparkplug hole, and crank it over a few times to get rid of any excess. The cylinder won't be starting dry and your rings will last a little longer. The Marvel Air Tool oil is a water displacing oil and will cut down on any rust. You especally want to do this if the fuel you are using is one of the blends that has ethonal in it. That will suck in moisture and you can get rust in a short period of time. I avoid any gasoline with alcohol in it. The high performance two cycles I deal with have a percentage of methonal and will get rust within a few days if not oiled. And they have a better oil than is used in chainsaws.
Best of luck with your saw, although you sound careful enough to make your own luck..
Regards,
Fog