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I have a Toro weed eater, model # 51950a, with running issues. I replaced the spark plug and fuel line to factory spec. and also cleaned the spark arrester screen. Unit still only run for several seconds, then I replaced the Carburetor with a new one, still will not run....please I need some ideas here, thank you

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Wow, you've almost rebuilt this thing, so I guess we have to look at the unlikely possibilities. I never really worked on one of these, but I'm going to guess that possibly the gas tank is partially blocked, or the tube from the gas tank to the carb has a crack or air leak. I'm assuming a magneto drives the spark, and wondering if it could fail after a few sparks, but couldn't find anything on that on the net. Here's the blog that suggests the cracked gas line:
http://www.justanswer.com/questions/2hfal-toro-51950a-trimmer-brushcutter-will-not-start-checked
Here's a pdf link that might help you:
ipl.ordertree.com/ipl/338/51950_51970_51990_661_eng.pdf
Good luck, hope this helps, and thanks for using FixYa.

Posted on Sep 16, 2010

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