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Don't know about the check valve, the guy didn't get into the details. I think it has to do with how the carb primes itself when you pump the push bulb.

Thanks, it was covered in gunk and i missed it. Sometimes the obvious can be the most elusive.

I have an older 056 (20 years old), no manual. Where is the oiler adjustment on this saw? It is running the oil out before the gas tank is empty and I want to slacken it back some. Thanks!

I wish I had saved the rebuild kit package, I don't know the part number. It was a generic rebuild kit that fit the carb. Two Stihl dealers knew of the right kit, so I assumed it was commonly available. To remove the check valve, you take the diaphragm off (4 screws with the little plastic...

All, I found this and thought I would share it. Very handy, has some good information about species BTU content and how to compare the value of firewood to other fuel sources. May help you guys some time. The second link is really good if you like to figure out how much energy you are selling...

Thanks for the advice. I spent yesterday dealing with this, and have it fixed (temporarily at least). You can actually pull out the check valve and plug the overflow from the carb. This allows you to pump gas straight into the carb instead of having to worry about the check valve. Trick is...

Been There A bit of personal testimony on this, to help anyone who reads this and thinks they don't need protective equipment. I got lucky in 1996 clearing fallen trees outside Wilmington after Fran tore up things. I was in the woods with my dad's 056, goosed the throttle after cutting a limb...

To close the loop, my local dealer/repair guy said these old slide carbs have a check valve in them that dies after a while. The carb doesn't seal properly, and when primed they either flood or pull air by this valve and won't prime at all. A sure sign is if the carb makes the engine bog down...

More info: last night I left the plug out to dry out the cylinder. Gas had dripped all down under the carb, the air filter was wet and gas was standing in the air intake. It's like the carb is siphonening gas out of the tank (uphill?) It appeared to have dripped from the relief on the...

Scott, I have not seen that it helps, what is your procedure for priming? For me, if I pump it one time too many, gas goes everywhere. Made me wonder if it was a mechanical problem or user error.

I have an old FS80, the real old one, all orange body with primer bulb on the gas tank. It is floods like crazy, very tricky to start. I just put rebuilt the carb, didn't seem to help. When I say floods, I took the carb off after an attempt to crank it and gas ran out of the intake port. Air...