Question about Troy Bilt Tb70ss Gas Trimmer

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Cant get weed eater to start

I have a tb475ss that is full of fuel but i have yanked and yanked and it will not start could you help me

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Look at these items for your weed eater. Make sure that your fuel mixture is correct and clean. Also make sure there are no air bubbles trapped in the fuel line. Agitate the fuel tank to make sure there is no blockage caused by dirt and debris. If you have a fuel filter make sure it is clean and does not need replacing.
Next check the air filter to make sure it is clean.
Next check that the spark plug, is it whitish grey and matt in colour and not back, oily or pure white. If so then change the plug and set the correct spark gap for the particular type of plug you are using. If the plug is black and sooty or pure white matt then the fuel mix is incorrect and you will need to adjust this. Black indicates too much oil in the 2 stroke and burning low and the white indicates over temperature and probably not enough oil in the fuel mix or using to high an octane rating. If it is oily then there is far too much oil in the fuel mix and if you are using a 4 stroke or a 2 stroke with additional lubrication then there is oil leaking into the combustion area most likely caused by a worn or cracked piston ring. After that check that the carb, is it operating correctly and opens fully when starting and closes as the engine warms upon idle. Also make sure that it idles evenly. Also if it stops when you throttle it then look at the spark cap to make sure it is not loose or damaged and produces enough voltage to fire up the plug correctly otherwise you may have a generator issue or a carb problem or air filter problem or something restring air flow. Also check the engine casing over for any cracks or damage.
Check this link out at Troy-Bilt for your weed eater. Just select the download owners manual below your picture. You will need to provide them with your model and serial. Just copy and paste into your browser.

http://www.troybilt.com/webapp/wcs/stores/servlet/product_10001_14102_10150_55008_-1

Hope this helps, let me know if I can help you with anything else.
JimmyC

Posted on Oct 06, 2009

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My husband has had repeated problems with starting his troy-bilt weed eater (4-cycle). After taking it to get it worked on, he learned that you are not suppose to squeeze the throttle when you pull cord. He hasn't had any problems since. Hope this helps. He talked with the people at Troy-Bilt and they were not interested in revising their instructions. They told him that he was suppose to squeeze the throttle to start it. He has just about ruined his shoulder from all the times he pulled the cord, holding the throttle down. Hope this helps someone alleviate some shoulder pain.

Posted on Dec 11, 2009

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Terry: According to eHow.com:

"
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  • 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.


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