Question about Poulan Pro Chain Saw 46cc 20"

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Chain saw starts after 10 seconds stalls

Clean the plug and the filter, check the fuel, when it starts it stalls can't pull the trigger and let it run open it stops

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You should feel a little bit of bucking when pulling the rope. If you don't, there is a chance the compression isn't up to par... there is one more thing that should be considered before going too far; some of the carburetors used a vacuum line from the bottom of the cylinder that goes to the top of the carburetor. If that cracks, it can cause this problem.

Posted on Dec 08, 2014

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It sounds like from your description that it's time to rebuild the carb. The other thing you can try to get you by for a while is turn the low side adjustment out a 1/4 turn CCW and re-try. If turning out the low side adjustment doesn't help, it's time to rebuild the carb and change fuel lines and filter.

Posted on Dec 08, 2014

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  • 322 Answers

Sounds like a stiff diaphragm in the carburetor. With the cost of carburetors it can sometimes be easier to just replace it but it definitely needs a kit

Posted on Dec 08, 2014

6 Suggested Answers

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Posted on Jan 02, 2017

dennisgladx
  • 52 Answers

SOURCE: poulan Super 1800 16" chainsaw .

Hi dortfran,
My name is Dennis and I hope to be of assistance.
This sounds like a kink in the chain and I would try a new chain because this can be a very small kink and very difficult to find and straighten out. If you must put the chain saw in a vise by clamping the bar and run the chain back and forth from the sprocket to the bar grove under operating tension and locate the misalignment at the bargrove. Now you have located the problem but the fix is still sweat away, and with some luck you may be able to spring the chain straight and have the link flexable to opporate without a hitch.
Glad to be of assistance. Please rate the solution because i can learn from your rating.
Thank you
Dennis

Posted on Nov 09, 2008

  • 9 Answers

SOURCE: Poulon Wildthing 18" Gas Chain Saw

Some Poulans vent thru a fuel line going from the tank to the carburetor. Some vent thru the cap but eventually the duck bill valve starts leaking fuel. Then I suspect some people change that cap to one without a vent, which causes the problem you are describing.

Posted on Oct 26, 2008

  • 205 Answers

SOURCE: Stihl chain saw won't achieve max rpm

Crank seals are leaking, causes lean or low vacuum for the carb to work properly

Posted on Mar 26, 2009

Fog Horn
  • 17 Answers

SOURCE: Have a Poulan Gas Powered Chain Saw, I haven't started in 10 yrs.

Not used in 10 years. Was there gas left in the tank? If so the carb is likely gummed up and may need to be taken apart and soaked in "Gunk" solvent and a new kit installed.

Posted on May 26, 2009

mark24354
  • 776 Answers

SOURCE: I have a poulan pro pp4620avhd chainsaw. I can get

The best thing you can do to these engines it take them completely apart - take piston out and everything. Believe it or not, my 12-year-old son was able to do it - very few parts in these little 2-stroke engines. He polished the carbon off of the piston with a drummel tool and cleaned everything with carb-cleaner. Put it back together and it ran like a champ. Still does. It was a great learning experience for him too. The worst that can happen is you have a bunch of parts that you will throw away.

Posted on Mar 19, 2010

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1 Answer

Chainsaw stalls


Not sure what to say other than its fuel starvation, if not already done replace the fuel filter in the tank, if no better i would suspect a massive air leak, so replace the crank seals, if there is no primary compression in the crankcsae fuel will not pull through the engine, good luck.

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Either the throttle is stuck wide open, or there is a large air leak behind the carburetor to cylinder connection. Make sure the carburetor is securely fastened. If it has a flexible connection to the engine, remove the connection and inspect it for tears or holes. Watch the throttle arm on the carburetor which should move from the idle speed screw to the full throttle limit casting/post when the trigger is pulled and released. If it hangs near full throttle, then remove the trigger mechanism (make notes of the parts positions) and clean out any dirt/sawdust. Check the air cleaner and muffler for plugging. Check the H needle adjustment after repairs by running the engine at full speed after warm up--the engine should 4-stroke unloaded, but immediately 2-stroke when cutting. Check the condition of all of the fuel lines including the line to the filter in the tank looking for decay or other damage. Use original rubber lines for replacement, not plastic substitute. Hope some of this helps!

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Make sure the chain can be turned by hand and is well oiled. Check the muffler, fuel filter, and air cleaner for plugging. Check the condition of the fuel lines and primer button--does the primer pull fresh fuel into it when pumped? Check the carburetor fasteners for tightness including the mounting to the cylinder. If there is a rubber isolator between the carburetor and cylinder, check it for cracking or any holes. Make sure you are using modern synthetic saw oil in the fuel, not boat motor petroleum based oil. If still acting up, clean and re-kit the carburetor. Hope this helps!

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I have a poulan pro pp4620avhd chainsaw. I can get it to start and stay running as long as I have the choke on. I can even run it at high speed using the choke control. When I pull the trigger to feed it...


Check the fuel filter and muffler for plugging. Check the fuel lines for condition. Check the carburetor fasteners for tightness. If the saw has a lot of hours, remove the lower section of the carburetor and check the condition of the diaphragm--it should not be hard/cracked. If everything seems to check out ok, Turn both jet screws CW to stops (lightly), then CCW each 1-1/2 turns. The engine should start and run--allow the engine to warm up. Pull the throttle full on and adjust H needle CW til the engine speeds up, but still 4-strokes. Proper adjustment is when the engine 4-strokes, but immediately 2-strokes when cutting. Let idle and adjust L CW so that the engine runs fairly well, but allows the engine to 'follow the throttle'. Adjust the idle speed screw so that the chain stops turning, but the engine continues to run. Hope this helps!

May 11, 2010 | Poulan Pro Chain Saw 46cc 20"

1 Answer

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2 Answers

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