Question about Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

Chainsaw won't start. Replaced carburetor, fuel lines, fuel filter, ignition module, spark plug. Using new gas and oil. Has good spark but won't pop.

Posted by billthuem on

  • jewelmccastl
    jewelmccastl Aug 17, 2012

    changed spark plug,fuel lines,cleaned air filter.i pulled the string so many times

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1 Answer

bryce hawryluk

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Try priming it mite work lol

Posted on Mar 29, 2012

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5 Related Answers

drallim

  • 4088 Answers

SOURCE: poulan saw wont run

Clean the muffler spark arrestor screen and check the cylinder port for carbon build-up at the upper edge. Try presetting both carburetor H and L adjustments (from lightly CW stops) 1-1/2 turns CCW each. Start the engine and allow to warm up. Pull the throttle wide open and adjust H CW until the engine speed increases, but still 4-stroking. Correct setting is when the engine 4-strokes, but immediately 2-strokes when cutting. Allow to idle and adjust L for smoother running, yet allows the engine to 'follow the throttle'. Set idle speed to keep the engine running, but doesn't try to move the chain. You may have to look closer at your carburetor if the above doesn't help. Go to:
http://www.drystacked.com
for an excellent article (but poor pix) on Walbro carburetors, but related to most all 2-stroke carburetors. Hope this helps!

Posted on Feb 24, 2010

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dontbother10

dontbother10

  • 2220 Answers

SOURCE: Craftman Chainsaw do not run

Extreme Flooding by Dolfoff
Please follow this link, http://www.fixya.com/support/t3226410-no_spark_new_plug_but_continues_flood cursor down to “Best Solution”, while there click the “Was this helpful? [Yes]” button HTH
Lou

Posted on Oct 20, 2009

somm33

  • 12 Answers

SOURCE: i have a 18 4200 poulan chainsaw i have a new carb

Hi, i would start by making sure the fuel is on if that is an option on your saw. Then makes sure there is nothing obstructing the flow of fuel from the tank to the carb. You can check the lines by draining the tank the blow thru the tank with an airhose and make sure air is coming from the delivery line that hooks to the carb. if all checks out there, then you my hve a gasket on backwards inside the crb or your fuel flow screw needs adjusted. You can check to see if the carb has gas by gently loosining the drain bolt on the bottom. Another option is removeing the air filter and dumping a small amount of gas directly into the carb and see if it starts then. If it does then yo have a problem with fuel delivery from the tank to the carb into the cylinder head. Hope this helps.

Posted on Apr 05, 2011

steve_lima

steve

  • 181 Answers

SOURCE: Gas chainsaw has no strong spark and wont start

the air gap should be .012", the gap you have it set at is to small.reset the gap and try it again.......hope this helps,let me know........

Posted on Jun 02, 2009

drallim

  • 4088 Answers

SOURCE: i have a poulanpro 260 chainsaw when i went to use

Check the fuel filter, and muffler for plugging. Check the condition of all of the fuel lines. Fix or replace the primer pump. When you get it working right, push the primer quite a number of times to flush all of the old fuel out of the carburetor. Unless the carburetor is in trouble, you should be able to start the engine again. Hope this helps!

Posted on Oct 23, 2010

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8. Water or dirt in fuel system, carburetor or filter.
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1 Answer

After starting and operating the chainsaw for a short time, it dies and I can't get it started again. Suggestions?


Engines require 3 things. Spark, compression and fuel. And chainsaw need 2-cycle oil mixed with the gas.

Assuming you have the right oil-gas mixture and a fresh batch of gas, and you didn't leave old gas in the saw all summer long since last November.

-Take off the dirty air filter and see if saw starts without filter. Do not run without putting in new filter.
-Check exhaust port for mud dobber home or screen clogged with carbon and dirt
-See if saw fires up after squirting WD-40 directly into carburetor
-Check gas line >>> pull gas line loose and see if gas flows out of tank to carburetor
-Take out spark plug > put finger over spark hole and pull cord >> do you feel suction that says you got compression?
-Put spark wire back on spark plug >>> hold spark plug so threads touch bare metal part of spark plug hole >>> pull starter cord and see if spark shows between plug and saw >>> suggest you not hold metal part of spark plug while pulling cord [you'll understand why]
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If your saw has compression, spark, and fuel it should start unless carburetor is gummed up because gas was left in tank.
Here is the final trick. Start the saw while spraying WD-40 directly into carburetor and see if you can keep it going with the WD-40. This might take a helper. If this does not work, then carburetor is bad or gas line is clogged at carburetor. Time to take it to the shop.

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1 Answer

Craftsman chainsaw 18" 42cc doesn't start


Remove the spark plug and test for spark. If nothing, try a new plug set to 0.020" gap. If ok, put a small mount of fuel mix in the plug hole and try to start. If you get several pops, then check the fuel filter, air cleaner and muffler for plugging. Check the fuel lines for rot or damage. Make sure to use fresh fuel premix (40:1) using modern synthetic saw oil in it's own can and shake thoroughly just before filling each time. If you got no spark in the first test, expose the flywheel and ignition module. Remove the wire from the module that goes to the ignition switch and check for spark. If still nothing, replace the module using a thin business card for a gap gauge between the module poles and the flywheel magnets. If you did get spark, then investigate the ignition switch and wire for possible grounding. Hope some of this helps!

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Remove the spark plug and check the spark--it should be blue and snappy. If weak or nothing at all, try a new plug and retest. If still poor, remove the left side cover to expose the flywheel and ignition module. Check and set the module to flywheel magnet pole gap using a thin business card for a gauge--place the card on the flywheel, loosen the mounting screws on the module and allow it to pull to the magnets, tighten the screws, and rotate the flywheel to remove the card. Recheck for spark. If still nothing, remove the wire from the module that goes to the stop switch and retest again. If still dead, the module is defective and needs to be replaced. If the first test produced good spark, then place a spoonful of fuel mix in the cylinder, install the plug and see if you get a few pops. If ok, then concentrate on the fuel system. Make sure the carburetor is tight to the engine. Are you using fresh gas and mixing 50:1 with full synthetic saw oil--not boat motor oil or other petroleum based oils? It's possible that something has become defective within the carburetor, but check the lower chamber diaphragm and the fuel metering valve that it controls. Go to: http://www.drystacked.com for a very good article on the workings of the Walbro carburetor. Hope some of this helps you!

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2 Answers

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Immediately after saw quits, while everything is still hot. Sometimes ignition modules quit working when hot.
Ignition Coil Test
SmallEng.com
http://www.youtube.com/watch?v=L7WNBDRG4C4
You may need to use a jumper wire between the threaded part of the plug and the cooling fins. You don’t have to bend up the electrode.

Loosen fuel cap when it starts to die, If that fixes it it has a fuel vent problem.

If you did nothing to the carburetor adjustments, are using a fresh (3 months or less) fuel mix with the same oil/fuel ratio, and are operating at the same elevation there is a reason your saw is acting up.
It sounds as though there may be a fuel delivery problem. Check the fuel filter on the free end of a hose in fuel tank (manufacturer recommends an annual replacement). Check all fuel delivery lines especially at fittings and bends for cracks and holes. If those are good then the likely cause is internal parts of the carburetor. HTH

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1 Answer

Poulan Chainsaw Gas line and filter from tank is fine. Even replaced the carburetor and still won't draw gas into the combustion chamber. I understand it has to get pulses from the engine to operate the...


did you check the fuel pump...is it pumping fuel? did u check also the ignition system if it has a spark? check the spark plug it might be flooded with fuel. hope this helps..

Aug 11, 2009 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

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