Question about Poulan Pro Chain Saw 46cc 20"

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A POULAN 4218AVX SAW RUN WITHOUT OIL IN THE FUEL.SAW WON'T IDLE, MAY HAVE SCORED CYLINDER. WHAT CAN I DO TO REPAIR IT?

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Depends on how long you ran it. Oil in the mix is used to lubrication in all 2 strokes. They are very tempermental with the air fuel mixture. Best case, you may have hung up the rings and they may get better as you run it, worst case you lmelted the piston and/or scored the cylinder in which case you have to replace. Probably cheaper to get a new saw.

Posted on May 27, 2010

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Buy new saw not a poulan it is cheap **** try an echo

Posted on May 27, 2010

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1 Answer

My poulan 4018wt has been a hard starter from new. It started to act up out of the blue and started shutting off halfway into the cut and didn't always want to idle right. So I changed the spark plug,


I'd say the most probable culprit is the fuel.... I'd first try dumping the tank out, mixing fresh gas with the addition of a fuel stabilizer and start the saw. It'll quickly vent any old gas in the line and should begin to run fine with the new mix. If not, consider returning it to the service center for adjustment.

Never use gas that has sit on a shelf for months at a time as it becomes 'stale' (for lack of a proper term). Todays 'formulated fuel' can be a cause a bit of a problem for some small engines. Anytime you refuel, shake the can to remix prior to filling.

The oxygenated nature of the blended gas sometimes causes the chain saws to run a little 'lean'...meaning too much air to fuel ratio which could be a portion of your problem. A lean running saw will run hot and scoring of the piston or cylinder wall is possible. Some finely tuned professional saws need carb adjustments between the summer blend and the winter blend gas.


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1 Answer

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Take the exhaust off so you can see the side of the piston, if it is scored or damaged it means it has probably been run without oil added to the petrol.
That can cause the problems you are having, if it is throw it away, its not worth repairing

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I put H closed and L almost closed started and now runs great.
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Weed eater fb25 won't start


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Could be carb adjustment, cracked fuel lines,bad ignition module, carb needs adjusting, bad fuel filter,or a scored piston and cylinder. Dont know what type saw you run but if compression is under 80 on a poulan it needs a new piston,rings and cylinder head. Need more info.

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2 Answers

Gets hot, sizes up.


Clean carb. Pull apart and soak in carb cleaner. Blow dry with air nozzle. Make sure air filter is clean and plenty of air. Make sure spark plug is not gapped wrong and running to hot. Make sure oil/fuel mixture is accurate

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2 Answers

They used none mixed gas now it won,t start is it burnd up?


Was this saw perhaps operated without oil mixed with the fuel?
· Remove the spark plug wire and plug.
· Remove the muffler, hold a light at the plug hole and inspect the cylinder through the exhaust port. Is it smooth and shiny or does it appear speckled with dull gray spots or smears?
· Pull the starter slowly, inspect the piston as it rises and falls. Is it a dull gray without scratches and gouges?
· Hold the light at the exhaust port and look through the spark plug hole, inspect the cylinder above the exhaust port. Is it shiny and smooth or speckled with gray spots or smears?
Any spots or smears on the cylinder or deep scratches and gouges in the piston indicate the saw was operated in a lean condition. Repair of this on a home owner quality saw often exceeds replacement cost. A repair estimate by the independent saw shop should be considered. HTH
Lou

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Poulan wild thing leaf blower won`t start. Has


SOUNDS LIKE YOU SHULD GET YOU A NEW ONE ITS CHEPER TO GET A NEW ONE

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1 Answer

Used wrong gas can and ran saw on pure gasoline.


if your saw didnt lock up ,or overheat it should run again, take out spark plug, with switch off, put your thumb over the hole and check for compression when you pull the cord. if it pops your finger off the hole you probably didnt cook the rings, or burnt the piston, the raw gas may have washed the cylinder down enough to temporarily lose compression (lack of oil seal). refill tank with proper gas/oil mix, squirt a small amount of oil in cylinder and pull it thru a few times , this should seal up the rings again , put in a new sparkplug, and try normal cold start, you may have to clean the plug a couple times before it runs. if it runs but lacks power my guess is the rings got to hot and lost their temper or scored the cylinder. dont use alcohol blended gas this will ruin fuel lines , they soften up and fall apart etc. premium regular if you can get it, check the fuel line to be safe for pinholes as they will **** air and not start if you get alcohol blended gas. anyway good luck. geo_1

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