Question about Poulan Pro Chain Saw 46cc 20"

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New saw - will not start. Have put in premium gas/oil mix. Getting spark from plug when cord pulled. Hasn't even fired once.

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kelvinsmerli

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Is your fuel new. i put 5 -10 big drops of GOOD fuel mix into the spark plug hole replace plug ,lock throttle open, choke it and pull. do this 3 times if no hint of start shoot a wiff of start fluid also with no choke. GoodLuck

Posted on Nov 24, 2015

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Richard Elders

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It's possible the brake is on. Try pushing the brake forward then pulling it back until you hear it click. Then try cranking it again.

Posted on Sep 22, 2010

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1 Answer

Husqvarna 372xp won't start... Mysterious


I recently bought a brand new 372XP and spent the first day trying to start it as per the instruction manual with no success, never even fired once. Removed the plug to find plenty of fuel and that the plug has a good spark. Left it until the next day mainly to allow my arm to recover (& scour the internet for clues). I found a forum that said not to use the decompressor and sure enough without the use of the decompressor button it fired first go with the choke on then I reset the choke & it ran properly on the second pull. The decompressor button can be reset with fine nosed pliers or removal of the top cover by undoing three screws. Good luck it's a great saw once you know how to start it.

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Back fires and rough engine


Drain your fuel tank first. Then mix 50/50 parts mixing oil and fresh gas. Put fresh gas into the saw as well as putting in a new spark plug and start it up. Stale gas (gas that has sat in the tank or gas jug for an extended period of time), bad gas or water in the gas will cause it to rough idle and back fire.

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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]
-If spark plug shows spark, then your saw has spark ... so put in new plug and start fresh.

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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I have a 455 rancher that is difficult to impossible to start. If I get it started and stop it it won't start back. when it starts it runs fine. I took the plug out and cranked the engine and there was a...


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It won't start.


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1 Answer

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The end of the plug where you are looking for the spark needs to be touching the head while you pull the chord. It must be grounded...

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i bought a new dirtbike as a kid n same thing.it turned out ,it needed to be a synthedic oil in the mix.try seeing for spark to begin with by putting sparkplug in the wire n touching diode to the engine block while pulling the cord.thats a good starting point to diagnosing your problem.maybe try warming it up in the house then try starting it with no choke needed.the saws i ve used needed you to give it throttle after you pull,n no throttle with choke.

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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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1 Answer

Wont start


Start with emptying the gas tank totally. Refill with fresh gas/oil mix. Todays gasoline ain't that great.
Also after putting in fresh gas and priming if it doesn't fire at all pull the spark plug and if it is dry, pour a about a tbsp. of mix gas in the plug hole. put the spark plug back in and see if it will fire.

Phil

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