Question about Poulan Wild Thing 2375 18" Gas Chain Saw 2.5 Cuin

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My Poulan saw will not fire

I lost compression in my chainsaw so I replaced the piston ring and now the saw will not fire. It has good compression, good spark, and it is getting fuel. Any ideas.


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  • jac wilson May 11, 2010

    air and timing are the only things left. also the quality of the fuel. a/f ratio could be the cause, pull the plug kill the ignition and use some starting fluid to dry it out. reassemble .

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  • 211 Answers

Hi

Check if the gas tank cap vent is plugged.Check if the flyweel key is sheared(ignition timing point).Check the fuel filter and air filter.
Hope this helps.

best regards savumihai71

Posted on Dec 19, 2008

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Posted on Jan 02, 2017

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It is getting fuel but has a weak spark and will not start.


DO NOT , I repeat do not use starting fluid on a 2 stroke chainsaw or trimmer. you will score the cylinder or the piston. When trying to diagnose a hard to start motor just give it a small squirt of mix in the carburetor. If it won't fire you have a compression problem or an ignition problem. when you test for spark make sure you have a good plug, that is well grounded and not in bright sunlight which can make it hard to see the spark. if you have spark, do a compression test.

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I have a wild thing 2375. Was running one day,shut itself off,and has never fired or started since. It has compression,fuel,spark,but will not so much as even pop. Not even on ether. Even local chainsaw...


In my experiance with two-cycles that have spark and fuel usually the missing ingredient is not enough compression. Try taking the piston out of the cylinder and check the condition of the piston ring and cylinder wall. The piston ring cannot be broken, collapsed or 'welded' to the piston which can happen if the saw is run on straight gas. The cylinder wall cannot be scored at all to get the compression levels required for gas with oil mixed in it to burn. One other possibility is that your spark isn't hot enough. Possibly caused by a small piece of carbon stuck in the spark plug or a bad ignition module.

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Poulan 18' model 2000 chain saw, quit running , will not start.


If you have a compression gauge, check the compression. Anything under 90psi is too low.

Check your flywheel key. If it is broken the flywheel will move and not fire at the correct time.

Note: if it does not sputter with carb cleaner then it's not your carb.

Next:
Remove your exhaust manifold. Look into the cylinder with a flash light. You are looking for scratches. Anything larger then a light fingernail is definite proof you need a new cylinder/piston assy.

If it passes that test do the following:

Pour mixed fuel straight into your cylinder until 1/4 full. Slowly pull your saw over while looking into the cylinder. If you see bubbles after the ring/rings go by then you need a new cylinder/piston assy. On rare occasions if no scratches are present on the cylinder wall or piston, you may be able to change just the rings.

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Four things I can think of:
1) There is a short in your spark plug wire. When you bend it to connect the plug in the machine it allows the exposed cable to contact the engine block. Examine the wire all the way to the coil.

2) Flywheel key is sheared ( you obviously know how to take off the flywheel since you checked the seals).

3) Flywheel air gap is not set correctly. Loosen the coil. Put the cover of a notebook or the cardboard piece of a cigarette pack between the magnetic portion of the flywheel and the coil. Tighten the coil down. This will get you the proper gap.

4) Your cylinder/piston or rings are scrubbed out. Even though it passed a compression test, on rare occasions it will loose compression only when it fires. So do the following:

Remove your exhaust manifold. Look into the cylinder with a flash light. You are looking for scratches. Anything larger then a light fingernail is definite proof you need a new cylinder/piston assy.

If it passes that test do the following:

Pour mixed fuel straight into your cylinder until 1/4 full. Slowly pull your saw over while looking into the cylinder. If you see bubbles after the ring/rings go by then you need a new cylinder/piston assy. On rare occasions if no scratches are present on the cylinder wall or piston, you may be able to change just the rings.

First if you can get a inline spark tester so you can see if your getting spark with the plug installed.

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Engine pulls over good, without spark plug in , but very hard to


nope the rod will not stretch.did you put the piston on backwards.ring openings go to the intake side of piston

Jan 03, 2009 | Poulan Wild Thing 2375 18" Gas Chain Saw...

1 Answer

I just replaced the piston ring on my poulan chainsaw it now has good compression but im not getting any gas to the piston area and if i shoot starting fluid to it. it dont even hit and try to start. i...


the engine is not sealed properly
check the gasket(seal glue)at crankshaft and other gaskets
check the carburator,clean it,inside there is a fine gas filter,check the needle,the diafragm,the fuel pump,the gas tube from the gas tank and the gas filter from inside the tank.

regards Mihai71

Nov 26, 2008 | Poulan Wild Thing 2375 18" Gas Chain Saw...

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