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Re: adjust carburetor gas and air intake on craftsman...
There is too much information to relay so I would suggest you go to Searspartsdirect.com and type in your saw number and on the right side there is an area for a manual. You will need to use your email addy and select a password for this but it is free. You can view or download the manual and the area you need is on page 15. Let me know if this won't work and I will copy and retype info requested.
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The fuel/air mixture in any gasoline-powered engine is regulated by the carburetor, and the carburetor in a Stihl chainsaw is factory-adjusted to provide the best performance.... You'll find three adjustment screws for the carburetor, usually located under the air filter cover.
Check to see if the boot between the carbureator and the engine has a crack in it, if it is cracked air will leak in causing a lean mixture and hard starting. Also will not run unless the choke is on.
There is no fixed carburetor setting on these engines, just two screws to adjust low-end and high-end operation. Special tool may be required, there are about a half-dozen screw head standards. Check eBay for tool. Get the engine to run and idle fast (idle adjust) so it doesn't stall, adjust low-end screw so that engine doesn't hesitate or sputter when accelerated. Adjust high-end screw to run fast and smooth on full throtle. Readjust idle to normal.
tighten the two air screws to just tight then slacken them to one and a half turns start the engine and adjust the low screw until tick over then open the throttle to full and adjust the high screw if it cuts out take the high screw to one turn and try that then adjust from there
gently run the fuel and air mixture screws on the carburetor all the way closed (clockwise).then turn them out one and a quarter turns each. That setting should allow the saw to start if you are getting fuel to the carburetor. Once the saw starts, make fine adjustments to the fuel/air mixture screws until the saw runs to your satisfaction.
Turn both jet screws CW to stops (lightly), then back out each CCW 1-1/2 turns. This is a basic setting that will allow the engine to start and run. Let the engine warm up, then pull the throttle full on--turn H screw CW until the engine speeds up somewhat. Proper adjustment is when the engine is 4-stroking unloaded, but immediately 2-strokes when cutting. Release the throttle and adjust L CW until the engine idles fairly well, but allows the engine to 'follow the throttle'. Adjust idle speed screw so that the chain stops turning, but the engine continues to run. Hope this helps!
There is usually a sticker with a craftsman Model Number on it, often "358.Something". That number can be used to find an IPL and if you are lucky an OM here: Sears PartsDirecthttp://www.searspartsdirect.com/partsdirect/index.action Start at 1.5 CCW from lightly seated then tune for performance like this: Carburetor Adjustment by Madsens.com http://www.madsens1.com/saw%20carb%20tune.htm CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly. Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run. There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too. HTH Lou Duplicate Answer
Try to adjust the air and gas intake pin. It is a screw type dial usually found sticking out the carburetor. You are tuning your carburetor, so you will have to test different adjustments until you get your desired running idle and power. I suggest you start with adjusting the air intake screws to decrease air supply going to the cumbustion chamber, It will probably make the chainsaw run when you give it a throttle.