Tip & How-To about Garden

Cleaning A Small Engine Carburetor

"My small engine will only run at an idle or half choke."

If you are having trouble with your, Trimmer/Weed Eater, Chainsaw, Leaf Blower, running at full speed; or it starts and runs for a few seconds and dies, then you will need to check the fuel lines first, and then the carburetor.

1. Check the Fuel Lines for cracks/breaks. If they are bad then go to: ( www.fixya.com/support/r6078121-fuel_line_relacement_trimmer_weedeater )

If Fuel Lines are o.k., then:

2. Check the Primer Bulb for pin hole(s) or cracks. This will cause it to start and then die. Replace it if it's bad. Try to start before proceeding any further. If you are lucky, this will be your only problem. If the Primer Bulb is fine, then:

3. You will need to disassemble the carburetor and spray with carburetor cleaner.

4. Use a Den Tek Brush, ( http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152 ), to clean the small portals in carburetor, including the jet, if there is one. These portals can become blocked.

5. If the carburetor has sat for a few months with old fuel in it, you may have to place the a. in carb. dip before puting the new parts on it. (The fuel turns to varnish over time, causing the carburetor to be paralyzed.) If you don't have carb. dip, you may be able to take the carb. to your local parts store, where they may do it for free.

6. Make sure the small screen, that sets down in a pencil eraser-sized hole, is clean. Take the screen out with a razor blade or utility knife. (Be careful not t scratch the carburetor while doing this.) Make sure that you can see daylight through it. If you have a 3 yr. old machine or older, the screen is probably clogged. You should replace it! This small screen will come with a New Carburetor Kit when you purchase one. The New Carburetor Kit will also come with a diaphragm, gaskets, spring and needle valve, and some other very small parts. If you have a New Carburetor Kit, go ahead and replace it all while you are in there.

7. Reassemble the carburetor.

8. Make sure the air breather is clean.

9. Start like you normally would.

Good Luck!

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Jim

Key Words: Weed Eater, Trimmer, Chainsaw, Leaf Blower, Snow Bower, Pressure Washer, Carburetor Dip, & Varnisized

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1 Answer

starting procedure


Terry: According to eHow.com:

"
  • Put on a pair of safety glasses. Remove the fuel cap from the Weed Eater and set it aside. Fill the fuel tank with unleaded gasoline that has been mixed with quality 2-stroke oil in a 40:1 ratio. Replace the fuel cap.
  • Move the Weed Eater to a safe place and lay it flat on the ground. Depress the fuel bulb located beneath the carburetor approximately six times to prime the engine. Press it slowly so that fuel has adequate time to traverse the fuel line.
  • Slide the handlebar-mounted engine "On/Stop" switch to the "On" position. Slide the choke lever beneath the fuel tank to the "Full" position.
  • Depress the "Throttle Lock" lever located beside the engine "On/Stop" switch. Keeping the lever depressed, squeeze the throttle trigger. Release the throttle lock. This sequence holds the trigger in the depressed position, which aids in starting the Weed Eater.
  • Roll the Weed Eater so that it is resting on the engine and the trimmer head shield only. This will allow the spinning trimmer head to avoid contact with the ground. Brace the Weed Eater by holding it to the ground with one hand. Using your other hand, pull the starter rope quickly until the engine begins to run. Do not pull the rope more than a dozen times. If it fails to start by then, squeeze the throttle trigger and continue to pull until the engine starts.
  • Allow the Weed Eater to warm up for about 15 seconds, then slide the choke lever to the "Off" position. Let the trimmer run for another minute without touching the throttle lever. After the Weed Eater has warmed up, squeeze the throttle trigger once to disengage the throttle lock. The trimmer is now operational.


  • Read more : http://www.ehow.com/how_6720315_start-gas-weed-eater.html"

    Jun 08, 2015 | Garden

    1 Answer

    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 the engine will die. I have thoroughly cleaned the carb, replaced both fuel lines and filled with fresh gas. What can I do to get the engine to run beyond full choke?


    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!

    Sep 22, 2013 | Weed Eater Fl1500 Le Leaf Blowers

    3 Answers

    Ryobi CS30 Trimmer starts and runs in full choke and half choke but stumbles and stalls on run. Not up to full rpms when in full choke and half choke....


    You probably need a slight carburetor adjustment. Try to turn the L mixture screw (the one near the bottom of the carburetor on the air filter side, closest to the engine) 1/8 to 1/4 of a turn counterclockwise. These mixture adjustment screws ( L and H) have odd heads on them and conventional tools won't turn them. I use an automotive type plastic wire connector (around 22 gauge) with a ring terminal end which I can hold. Tap the plastic end of the wire terminal connector onto the head of the screw with a small hammer and this will enable you to adjust the L screw. This adjustment will increase you high speed side and possibly allow it to run off choke in a regular manner.

    May 21, 2011 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

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