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Toro line trimmer model TB90BC

Ok now when I first start the trimmer cold I put it on full choke of course then when I hear it pop or act like it wants to start then I put it on half choke and so on. It will start sometimes but when it does start it will run only for like maybe 5 seconds then cuts right off everytime it starts. I just got finished taking the carburetor apart then soaking it the carburetor cleaner yea know the little paint looking can with the basket in it by gunk. And it still is doing the same thing. I am thinking vapor lock but I tried to start it with the cap of o yea and I tried starting it with the muffler off also and still the same symptoms please help thank you.

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  • Missourian May 08, 2009

    This is sthe third line trimmer from toro that I have had this problem with. I only get one season out of the trimmer. Where I purchased the trimmer from has replaced it twice. There was no old gas in the tank, I used new gas. The trimmer would start, but when I tried to accellerate the throtle, it would die.

  • Anonymous May 20, 2009

    I have a Troy BC90BC and it has the same problem. Its about three years old and I have done everything under the sun to solve this problem of not want to run at full speed. It will only run with the choke handle in the middle and stalls if you give it any gas. Does anyone know of a brand of string trimmers that doesn't preform like this.

  • Antonio Boscia
    Antonio Boscia May 11, 2010

    does it only start with the choke on? does it only start if you primer it first?

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First you may want to check your fuel that is in the tank, how old is the fuel and was there any old fuel in the tank before you put fresh fuel in? Todays gas isn't as good as it used to be the ethonol in fuel is eating pretty much anything that is made of rubber in our 2 & 4 cycle engines cleaning doesn't always help. You may want to try a rebuild kit for it. And re-adjust the high and low idle needles (jets).

Posted on Jan 08, 2009

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