od at high rpms
Poulan

Experienced gardeners share their insights in answering this question :
Adjust both till it runs perfect or set the idle screw up some.

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Insert a small flat-head screwdriver into the idle speed screw and turn it clockwise to increase the engine speed if it idles too slowly. As soon as the chain starts to move, turn the screw counterclockwise until the engine idles without dying and the chain stops moving for the correct idle speed.
A Poulan chainsaw won`t stay running if the air filter is dirty or has a buildup. It can cause the chainsaw to get insufficient air and too much fuel. This can also affect the airflow in the engine, causing it to stall.
Adjusting the Idle Speed on a Poulan Chainsaw

Begin with the saw`s low-speed jet opening 1.5 rotations from the closed position when you adjust the carburetor on your chainsaw. After starting the saw, modify the low jet until the chain stops or nearly stops while maintaining an active throttle.

If the carburetor is new or has been rebuilt, you should set it to “factory” adjustment. You can do so by adjusting the idle mixture screws to 1.5-2 turns out, and the idle speed screw to 1-1.5 turns in. Warm the Engine Up. The engine`s running temperature directly correlates with proper air and fuel mixtures.
Locating the Adjustment Screws

You should see three screws, although two may be protected with plastic guards. The screw on top — marked “T” — is for adjusting the fuel mixture while the engine is idling.

Q: How do I mix gas and oil? A: Mix 3.2 ounces of Poulan 2-cycle air cooled engine oil to one gallon of fresh unleaded gasoline to obtain the recommended 40:1 fuel to oil ratio.
There are many factors that can stop your chainsaw from running, including a bad spark plug or dirty air filter. There are simple problems: a broken fuel line, bad fuel, wrongly calibrated high-low adjustment screw. Also, more complex issues like a damaged carburettor or an engine compression problem.
Over time, the spark arrestor can become clogged with soot. If the spark arrestor is clogged, the chainsaw may run stall or run rough. To unclog the spark arrestor, remove it and clean it with a wire brush. You can also replace the spark arrestor.
Over time, the spark arrestor can become clogged with soot. If the spark arrestor is clogged, the chainsaw may run stall or run rough. To unclog the spark arrestor, remove it and clean it with a wire brush. You can also replace the spark arrestor.
Often, dirt in the idle circuit can cause a no-idle situation, where the engine will run well at road speed. Sometimes, removing the idle mixture screw, blowing compressed air into the hole, replacing the mixture screw and readjusting the mixture may cure this problem.
The idle air control valve enables the engine to idle smoothly rather than stall out while the vehicle is stopped. It will continue doing so until you step on the accelerator and the vehicle starts to move again. In gasoline engines, engine speed depends on airflow, which is controlled by the throttle body.
With the idle mixture screw removed, the tapered portion is what adjusts the volume of fuel allowed into the engine. Turning this adjustment screw clockwise (in) reduces the amount of fuel. Turning the screw counter-clockwise (out), increases the amount of fuel delivered to the engine.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Won’t idle ,runs wide open unless you pull choke,solutions?
ANSWER : Maybe a carb overhaul can do the job.

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Poulan chainsaw 18″ 42 cc, pro gas filler cap?
ANSWER : Yep they swell after a while and will not screw in or out!
Sand the threads down so that the circumference is reduced with a course file or plumbers cloth, chamfer the threads a bit on the edges. A new one will do the same thing after a while so just fix the one you have.

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Poulan pro 42 cc, no spark – Poulan Pro 42CC 2 Cycle Chainsaw, 18"
ANSWER : Try diss connecting the earth cut out wire from the ignition unit and try for a spark again, this will rule out the switch and any trapped wires, re set the air gap between the unit and the flywheel to 0.3mm, if there is still no spark the unit is bad and will require replacment, they are normally only held on with a couple of allen screws, and either bolted to the cylinder or the crankcase.

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Poulan pro 46cc will not idle
ANSWER : Fuel pump in carb is hard and not pumping. rebuild carb

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Where is the idle adjustment screw on my 42/18
ANSWER : On the left side of saw above primer button is a hole going to the carb, the screw is there below switches.

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Poulan stalls out
ANSWER : On the side of the carb you should find two screws, one for the low speed jet nd one for he high speed jet. Turning the low speed jet only about a 1/4 turn at a time, adjust it in or out until it idles smoothly. Go to arboristsite.com, chainsaw and do a search on tuning for more complete info.

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Poulan chain saw crank easily and idles fine. When I give it gas it goes dead. What could cause this problem and how can I fix it.
ANSWER : Http://www.madsens1.com/saw%20carb%20tune.htm
Try this site for carb adjustments and possible cause.

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Will not idle. must keep gas on throttle . it’s a poulan pro 42cc chainsaw
ANSWER : Replace your carburetor air filter

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