- • On the top right corner, you can find a button called “INFO”. By clicking this button additional information about the app as well as setting up the carburetor can be found like float height, position of the jet needle or the air adjustment screw. By clicking the small red X underneath the info button, you can return to the home screen.
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This is a must have tool for anyone that fixes small 2 cycle engines that have a Walbro or Zama carburetor. It is Poulan part# 530035560 and is readily available on ebay or amazon.
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Demon Carburetor Jetting
When the primer bulb on your lawn mower isn't priming, it puts the carburetor at a disadvantage. Designed to replace air in the fuel lines and carburetor with gasoline when you depress the button several times, a primer bulb provides a crucial service that makes starting the engine easier. Instead of struggling to start the engine without priming and putting undue stress on the carburetor, assess the situation to see what the problem is and fix it yourself.
Faulty Priming Symptoms
If you're familiar with your mower at all, you probably know how it feels when you push the primer bulb in and it delivers the fuel to the carburetor. There's a slight resistance when you push it, and you can feel that it's pulling fuel from the gas tank. When it's not working, however, the bulb may refuse to pop back out after you depress it. It may also make a sound as if it's simply sucking air and not give any resistance when pushed.
Possible Problems
When the primer bulb isn't working, it may be a problem with the bulb itself, with the fuel lines that feed fuel to the bulb or both. Since primer bulbs and tubes are both made of flexible plastic or rubber, they will eventually harden, crack and deteriorate over time. A primer bulb that's lost its suppleness doesn't respond as a new one does. The same goes for fuel lines. When they've hardened and cracked, they let in air, which makes it impossible to draw the fuel into the carburetor properly.
Primer Bulb Replacement
Primer bulbs are usually positioned on the lawn mower one of two ways. They're either directly on the carburetor, or placed at a distance from the carburetor and connected to it with rubber tubing. Once you've gained access to the bulb's housing, remove the screws that hold it in place. Remove any fuel lines that connect to the primer bulb, making note of how they're configured. Install the new primer bulb and reconnect any fuel lines as necessary. Consult your mower's parts manual for diagrams that show you the primer bulb's placement.
Fuel Line Replacement
As a rule, it's a good idea to replace the primer bulb and the fuel lines at the same time when you have the primer bulb assembly dismantled. Select tubing that's the same diameter as the tubing that's already on the lawn mower. Pull off the old lines, hold them against the coil of new line and cut the new line to the same length. Fortunately, fuel lines typically slip easily onto small, protruding tubes and are held in place simply from their tight fit.
References (1)
About the Author
Carburetor Jetting Software Store Near Me
Amie Taylor has been a writer since 2000. Book reviews, gardening and outdoor lawn equipment repair articles and short fiction account for a handful of her published works. Taylor gained her gardening and outdoor equipment repair experience from working in the landscaping and lawn-care business she and her husband own and operate.
Cite this Article Choose Citation Style
Taylor, Amie. 'How to Fix a Lawn Mower Carburetor When the Primer is Not Priming.' Home Guides | SF Gate, http://homeguides.sfgate.com/fix-lawn-mower-carburetor-primer-not-priming-102114.html. 29 December 2018.
Taylor, Amie. (2018, December 29). How to Fix a Lawn Mower Carburetor When the Primer is Not Priming. Home Guides | SF Gate. Retrieved from http://homeguides.sfgate.com/fix-lawn-mower-carburetor-primer-not-priming-102114.html
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Taylor, Amie. 'How to Fix a Lawn Mower Carburetor When the Primer is Not Priming' last modified December 29, 2018. http://homeguides.sfgate.com/fix-lawn-mower-carburetor-primer-not-priming-102114.html
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