Question about Poulan Pro Chain Saw 46cc 20"

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I have stihl chain saw it runes full throttle

I have stihl chain saw it runes full throttle but does not idle

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After you let off of the throttle it dies instantly or just kind of quits slowly ?
It could be :
- 1 ) Your clutch is hanging up and not allowing the engine to idle while the chain is not moving.
- 2 ) You need to set the idle higher. You will need to remove the air cleaner, and find the small idle adjustment screw, and turn the screw clockwise, until it idles.
Please let me know.

Posted on Feb 08, 2010

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Posted on Jan 02, 2017

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Stihl saw problems it won't start and flood fuel in to the air filter why is this ?


There are several conditions and situations that this can occur, but let's try the most common. This is also for any STIHL saw that was manufactured before 2014, after that, the M-Tronic saws have a different starting method.
Normally this happens when the engine fired and it was not audible, and the rope has continued to be pulled with the choke on.
This method is approved, but EXTREME caution should be used, and the CHAIN BRAKE must be used.
CAUTION: Do NOT use the drop start method, this is not an approved starting method under any circumstance!
1) Place the saw on the ground that is clear of debris.
2) Set the Chain Brake
b) place the toe of your right shoe thru the rear handle,
c) support the saw top handle with your left hand,
d) pull the recoil with your right hand.
3) Make sure the choke is NOT applied, place the master control lever in the start position (one notch above the choke position)
NOTE: at this point, it helps if a second person can hold the throttle at the full or wide open position.
4) Make 6 rapid pulls (a few more may be required), you should hear the saw start to sputter, keep the throttle open until enough rpm is obtained that YOU the Operator can gain control of the throttle (the other person stands aside now in a safe position) and remove the chain brake. Keep the throttle open until the saw starts to run properly.
*NOTE 2: The chain brake is designed to not only stop the chain in case of 'kick back', but also is to be used in starting the saw until you have time to gain full operational control of the saw. However, extended rpms above clutch engagement can damage the brake band, overheat the drum bearing, damage the clutch shoes and clutch drum.

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https://www.stihlusa.com/.../instructionmanuals/stihl-ms-290-310-390-owners-instructio...
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Is the saw oiling correctly? need to check the RPM's at full throttle with bar and chain on to see if it is running right with a tachometer. I suggest taking it to a dealer to have them do the STIHL Engine Check List to determine the exact cause

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Stihl 290 chainsaw that will not idle after full throttle,i got carburetor machine cleaned by main dealer but still as if saw isnt getting fuel r out of tuning


First, is it really hard to start cold? second, will it idle after it is started? finally, have the dealer do a pressure and leak test of the engine to look for air leaks

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What is H and L carb setting for a Poulan P3314


The "L" is your idle setting and the "H" is the wide open fuel setting. After the engine starts and runs a minute adjust the "L" to the smoothest run setting the go full throttle and adjust the "H" the same way.

Hope this helps.

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42cc 18 inch craftsman chainsaw model 358-351910-18. Saw runs great at idle or while not cutting wood, when starting to cut wood just after the entire bar gets into the wood engine bogs down and chain...


Generally this is a fuel / air ratio problem. Usually it can be solved by a carb adjustment. On the carb there are usually two screws, one marked low or L , the other marked high or H. Low is your adjustment for idle mixture, high is for mixture at full throttle. The saw should Always be adjusted to run well during the cut. Make adjustments a little at a time, then try The saw. Continue small adjustments untill the saw is performing well at full throttle while Cutting.

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I have a stihl 044, older saw and its not running properly. When I try to start it with the full chock, I get fuel ranning out of the muffler every time I try to start it. I take off the air filter and...


I would say it is flooding, you realy need to pressure test the carb to check the seating of the inlet needle, a simple bulb tester is all you need, connect it to the fuel inlet on the carb ( where the fuel hose is connected ), pump approx 2/3 psi into the carb, it should hold this steady with no leak, any leaks then you will have to fit a new inlet needle, let us know how the test goes.

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Yes! So here are some links:


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Thumbs back!

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1 Answer

Need the know the correct H and L settings for our Poulan P3314 14 in. Gas Chainsaw - 33CC. The chainsaw will not idle.


There are no hard and fast settings.
The initial starting point "H" and "L" are 1.5 turns CCW from lightly seated.
The"T" adjustment enters here too (idle speed) and there is initial setting without a tach, depending on age may not be any initial "T" setting.
The "L" needle is primarily idle performance (not speed) and acceleration to full throttle.
The "H" is mostly performance at speed, but all are interconnected.

Fresh mix of fuel. Put ALL of the old mix in any 4 cycle and start new. I suggest 50:1 regardless of what your manual says. This is the best performance adjustment I have found.
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.
  • Clean the spark arrestor and muffler; if the saw cannot exhale it cannot inhale.
  • There are 2 wav (sound - idle & full - may not be highlighted) files that I find most helpful, I think you will too.
If push comes to shove a local saw shop (I prefer Stihl mechanics and do not own a Stihl) should be considered.

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

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Tunning specification for a stihl 028 chainsaw?


I'm not sure there are any "endorsed" tuning specs from Stihl as weather, temperature, fuel quality etc all contribute to engine performance.
Pictures of all types are all over the web.

As for the carb tuning procedure, maybe I can help?

Start with fresh fuel, all filters clean, and bar and chain installed. Also, fill the chain oil tank with bar/chain oil and VERIFY that the chain oiler works properly.
Initial fuel mixture settings (the H and L screws) should be 1.5 - 2 complete revolutions counter clockwise from lightly seated. Sight the carb's throttle plate and adjust idle screw counter clockwise until the plate stops moving.(Throttle closed completely.) Then go back clockwise 3 complete revolutions. This will produce an acceptable startup condition on a HEALTHY saw.
Clamp the bar in a STURDY bench vise and roll the chain with the shank of a screwdriver to verify it is clear. BE SAFE!
Choke the saw and pull the starter rope until the engine "burps".
NOTE: If no burp after 6 pulls, stop! Something is wrong.
After the burp, set choke to half and pull starter until it runs. The settings I gave should produce a slightly rich condition and a slightly high idle. (Chain will be in motion!)

Blip the throttle trigger and idle it down just enough to keep it running during the tune procedure.
Step 1) Using the "L" screw (closest to the engine), turn it clockwise until the engine smooths out or possibly increases RPM. Back it out slightly until the engine has a slight "LOPE" sound to it. (Like a drag car on nitro).
Step 2) Accelerate the engine to full throttle and go to the "H" screw (closest to the air filter) and slowly turn it clockwise and note the RPM increase. There will come a point when the saw will "Top-Out" and loose power. Not even enough power to turn an maintain empty chain's RPM! Go back counter clockwise to the edge of that point, and counter clockwise another fourth (1/4) revolution.
Step 3) Idle the saw back down. Again go to the "L" screw and repeat Step 1.
Step 4) Repeat Step 2.
Step 5) Idle the saw down until the chain stops moving completely. NOTE: Don't settle for a "crawling chain" condition. If the steps above are performed well and all else is healthy, you should be able to idle the engine down to a ridiculously low RPM and it will not shut off.

Hope this helps,
Dolf-

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