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Experienced gardeners share their insights in answering this question :
Make sure you are using 40:1 ratio fuel mix.

With a chain saw owners manual usually recommends running engine for at least 60-120 seconds to warm it up before engine temperature is enough to where engine will idle.

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The two most common reasons a chainsaw won`t idle are a blocked air filter and an idle screw out of adjustment. Other possible causes include: Dirty Air Filter. Idle Screw out of Adjustment.
Adjusting the Idle

Replace the filter, start the saw and turn the “T” screw counterclockwise to increase the fuel mixture and the idle speed; turning the screw counterclockwise decreases both. You`ve achieved the proper fuel mixture when the engine idles smoothly but the chain doesn`t spin.

The carburetor might be clogged. A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall.
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.
Most chainsaws idle at around 2,800 to 3,200 revolutions per minute, or RPMs. At this speed, the crankshaft continues to spin, but the clutch doesn`t. When the trigger is pressed and the engine speeds up, the force pushes outward on the clutch.
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.
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.
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If your chainsaw still starts and then stops working, check the air filter. Clean or replace the air filter if it is dirty or damaged. Another reason that your chainsaw starts and then stops working could be that the spark arrestor is dirty or clogged. If this is the case, clean it with a wire brush.
The fuel line may be clogged from stale fuel deposits, more reasons to cause your chainsaw to cut out when applying throttle. If a fuel line is cracked, it will leak gasoline and draw air from outside into the fuel line. If the line is leaking fuel, it needs to be replaced.

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<!– from fixya rte –>How far to turn idle screw out after rebuild – Poulan 14 Woodshark Chainsaw
ANSWER : You’ll have to do a visual on this one. But you turn it out until the throttle plate just starts to move, where it can get a little air. This is the initial start position and you can fine tune afterwards.

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MY POULAN PRO 6.5 WONT START….nEED TO REPLACE SPARL PLUG BUT DO NOT KNOW ‘right one”..
ANSWER : Take the old plug out, any auto store should be able to match it up.

Gary

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Poulan pro weedeater will not start without starting fluid and wont accelerate after starting Once started the first time it is easy to restart and idles fine, just cant accelerate the motor without it dying.
ANSWER : Your carburator is clogged.
1st make sure you have FRESH gas.
Empty and clean the fuel tank
Remove and disassemble the carburator and soak it in fresh gas for about 15 minutes to disolve any gunk.

Using a can of small carburator cleaner ( available at Lowes, Home Depot etc.) blow out all the ports.
reassemble and refuel with clean fresh gas
The little carbs clog easily

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Poulan leaf blower wont start
ANSWER : Try changing the spark plug. if that doesnt work let me know and i’ll help you trouble shoot it.

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Poulan blower was running – ran out of gas – put gas in – won’t start- primed – won’t start – let sit – won’t start-took cover off – sprayed starter fluid in carb – won’t start- -(very little stutter) won’t start-set overnight – repea -twon’t start-wits end !!!
ANSWER : Hello
Does it use a fuel and oil mixture?You probably did that.

Try removing the spark plug and cleaning it with a wire brush or some emery cloth.Make sure you have spark by connecting the plug wire and resting the plug on the metal motor block.

Do not hold the plug in your hand ,if you have no spark you may have a bad magneto.

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16′” Wildthing wont Idle after turning the “t” throtle screw
ANSWER : You only screw it in till it moves the throttle plate. Now start it and set idle

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Poulan pro chain wont stay running – Poulan Pro Chain Saw 46cc 20"
ANSWER : Keep “poulan” ha ha

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My poulan pro 42cc is hard to start ,,, its1 year old an i’m not sure if its worn out from alot of use or if its with the ignition
ANSWER : Throw it out and buy a new one this is a throw away scoiety we live in due to cheap *** chinese **** oh yeah go green

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