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Husqvarna 455 Rancher

Discussion in 'Homeowner Helper Forum' started by Tom Stitt, Oct 25, 2018.

  1. Tom Stitt

    Tom Stitt ArboristSite Lurker

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    I’m at a loss, can anyone help?
    I have a Husqvarna 455 Rancher that is dying after two or three minutes on medium to high throttle.
    I have done the following to it:
    New piston & cylinder
    New crankshaft seals
    New bearings
    New muffler
    New carb diaphragms
    New fuel lines
    New tank vent
    I also tried a brand new replacement carb.
    It was first run with a full tank of fuel at idle so the new piston wasn’t damaged.
    It will run all day on idle. It only dies after revving it for two or three minutes. Once it stops I found that if I open the fuel cap and then close it again it will run again for two or three minutes.
    Any advice will be much appreciated as this saw is driving me bonkers.
     
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  2. ATH

    ATH Addicted to ArboristSite

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  3. Tom Stitt

    Tom Stitt ArboristSite Lurker

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    Ah! I thought this whole site was just about chainsaws
     
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  4. Jules083

    Jules083 ArboristSite Operative

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    I know you’ve posted new tank vent, but that still sounds like a bad tank vent. Maybe try running it with the gas cap slightly loose, just to see if it still does it?
     
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