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

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Put new fuel lines to carb, cleaned carb. and reassembled. Now will start but runs only on half choke at high throttle. Engine will die out if taken off choke or will kill if I press throttle trigger. Any idea what could be the problem...thanks

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Check gasket between carburator and cilinder, if ok set newly idle settings on carburator. if its ok but not helping. Maybe cranksaft sealing faulty.

Posted on Mar 19, 2011

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My Weed Eater FL1500LE gas leaf blower will not run beyond the full choke setting. If I move the lever to half choke the engine will stop. Or if I move the throttle from full throttle to a lower speed...


This is a tell tale sign of a lean fuel mixture. By choking the unit you are manually creating a richer fuel mixture. I would purchase a compression tester from a local parts store and check compression. If that's ok, I'm willing to bet the problem is still carb related. Two stroke carbs are tricky to clean because of high/low ports that are one way and sometimes impossible to clean. Did you remove high and low needles when cleaning carb? Another trick is to mix seafoam with your gas, then mix two cycle oil to proper ratio. Use 2 ounces seafoam to one gallon of gas, then mix two cycle oil to proper mix. Hope this helps! Good luck and happy wrenching!

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Mar 13, 2010 | Oregon Scientific Complete Carburetor for...

1 Answer

Starts full choke dies out runs for a few min at half choke dies out at no choke. noticed tank is full of air bubbles when running


First, you will need to check the fuel lines for cracks/breaks.

You will need to disassemble the carburetor and spray with carb.cleaner. Make sure the small screen in the carb. is free of debris. Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152), to clean the small portals in carb. These portals can become blocked. Reassemble and start.

(NOTE: If the carburetor parts are more than four years old, and depending on the use, you will need a new carb. kit if the cleaning doesn't work.)

If you need further assistance, just let me know.

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Engine run @ half choke but will not run in run position


It's starving for fuel. What is it? Sounds like the jets are plugged in the carb. or possibly water in the gas. Remove carb., disassemble, clean and put back together. You should get a rebuild kit for it first so you have new gaskets, etc. when you reassemble. It's a little more complex than I can put in words for you here.

Also empty and clean fuel tank too and start with fresh, clean fuel.

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