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I have a broken primer bulb for an Echo CS-3400 chainsaw. I need to replace it but am not sure how to remove the old bulb. I can access it but am not sure if it will be necessary to remove all the guts of the saw to get it out.

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  • fvmany May 03, 2009

    Broken purge bulb. Easy to remove air filter cover but not at all obvious how to free it from the black ring holding it to the housing.

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You should be able to get to it if you just take off the cover that surrounds it. If you do not yet have a bulb purchased, I would reccomend trying the site I have below. I have also put the part number you will need to enter in the 'Search' box on the site to get the right bulb.

web site: www.m-and-d.com

Part #: ST-615-811

Posted on Mar 07, 2009

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