How do I reset carb. screws to factory settings

Adjustment and Tuning of a Chainsaw Carburetor ' Chainsawr

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Carburetor Adjustment for Chainsaws Carburetor adjustment is critical on chain saws ... These saws have what is called a "fixed jet" which is set from the factory.

Stihl Chainsaw Carburetor Adjustment - Tune-up Settings

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Stihl chainsaw's have three carburetor adjustment screws (LA) Idle Speed screw - This ... When the engine is tested at the factory the carburetor is set to obtain a ...

How to Adjust the Air and Fuel on a Stihl Chainsaw ' Home ...

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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.

Factory carb setting on Craftsman 2.0 or Poulan Micro ' Firewood

The carb is factory set you need to remove carb you will then see two screws one marked L and the other H with a small hacksaw cut a slot across both screws don't worry about cutting into carb body this can't be helped screw both screws fully in then back them off 1 and 1/4 turns this rough sets high and low running start saw set low speed first adjust screw in or out to get best low running then rev saw to max.and adjust max revs do the same as you did with the low speed screw to obtain max revs this should solve your problem.

Hi no you cannot add the adjustment screw, some carbs are set at the factory on some they put a aly plug over the screw so you can't adjust it, good luck

The factory will not give carb settings as these machine are set from the factory for the best emmisions, this is why there is a special tool required to alter the screws, the screws are fuel screws not air screws, so as you un screw them ( anti clockwise ) more fuel is let through the carb, your machine is running too lean so the screws are in too far, before making any more adjustments check the fuel filter in the tank is not blocked, check the block the carb is connected too is not loose on the cylinder ( i have seen the screws coming loose ) if all is ok unscrew both screws out a further 1/4 turn and try again.

Once high end needle is screwed fully in you can u twist screw 3 full complete turns and then wind more in as youre tuning.

To reset the carb to factory setting, do the following > Turn the air screw and the throttle screw inward until they LIGHTLY seat. now open each of them up one and one half turns. This is the factory setting. Note the light seating of the screws. Too tight and you can easily deform a screw by creating a ring indention at the point where the screw meets the jet. This can affect the smooth running of the engine and requires a new screw to fix it. Please rate my answer. Thanks!

Time for carb cleaning, blow the jets with compressed air and check the fuel level in the float chamber, adjust if necessary.
Tht factory plug is where the air-mixture screw is and tht plug has been kept there for non tampering!
That screw is factory set.
Basically its the primary jet which is a problem in your bike's carb, but all in all might as well blow both of them.
Hope this helps!

The air screw and throttle screw are the only settings on the carb. Bear in mind they only screw in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. This is the factory setting. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.


If the screw adjusters were screwed in tight they will likely need to be replaced. The end of the screws will have a depression ring and that little ring can screw up the carb.

Could you take a moment and rate my answer? Thanks!

you don't! set pilot two turns out from fully in on carb pilot jet, start engine and set throttle adjuster screw on carb to fast tick over, adjust pilot to get even firing and readjust throttle screw to @1000rpm

Hi Walker14,

You have to sync thecarbs and also you will have to reset the air-fuel mixture screws.
One of the carburators should be factory adjusted, I dont wn a kawasaki but I own a YAMAHA SECA XJ750R and thro it I am sharing my experince.
Once you have located the factory preadjusted carburator you can thn set the others to its specs. I use the feeler gauge to do for my bikes carburators and it works fine.
With regards to the mixture screw..... get the all in tightened but slowly aas to not damage the pin end of it!.
Start the bike and get it to normal running temp and thn set the screws 2 and half turns out...you may need to set your idling speed before you begin this setting of the mixture screws, you prolly will hveto go higher on revs or vicecersa ....onc eyou are at the mixture screws and adjusting them , you will surely note the differenc ein sound of he bike an its idling ..
Hope this will help.


Knight.