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Hot!Problem with 455 Chainsaw - Advice Please

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MarkP
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2019/09/12 08:06:45 (permalink)
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Problem with 455 Chainsaw - Advice Please

Used the saw Saturday for about 1 hour, ran great, new gas and oil just added Saturday.
 
Topped off the tank Sunday and tried to start but no go.
 
Eventually I was able to get it to start but it smokes like a mosquito sprayer.  Starts after about 8 pulls with choke activated, when I close the choke it immediately revs to about 3/4 total rpm smokes like crazy and as soon as I touch the throttle trigger it dies.  While running unburnt fuel (I believe) is spewing out of the muffler.
 
Have hard the carb off 3 times and cleaned but no change, adjusted the idle and high speed screws and no change.  Ordered a rebuilt kit and got the wrong one so will be re ordering again but am asking for advice before spending more time and money as I have no idea what the problem is.  Saw is about 3 years old but has than 10 hours total use and was running great Saturday then this problem started the very next day.
post edited by MarkP - 2019/09/12 08:26:28

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    AVB
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    Re: Problem with 455 Chainsaw - Advice Please 2019/09/12 12:05:32 (permalink)
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    Does sounds like a flooding carburetor. Appears the have the WTEA-1 carburetor. Just remember that the metering lever height is critical and doesn't adjust the same as the regular WT series. You should be using the 500-528 tool to set it. But it can be gotten fairly close setting it with the old W tool if you have the new metering gasket (not the diaphragm) in place.
    MarkP
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    Re: Problem with 455 Chainsaw - Advice Please 2019/09/12 12:18:46 (permalink)
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    AVB
    Does sounds like a flooding carburetor. Appears the have the WTEA-1 carburetor. Just remember that the metering lever height is critical and doesn't adjust the same as the regular WT series. You should be using the 500-528 tool to set it. But it can be gotten fairly close setting it with the old W tool if you have the new metering gasket (not the diaphragm) in place.


    Thanks for the reply,
    Not very knowledgeable about all this so I really don't understand your reply.  What is the 500-529 Tool? and what is the metering lever height, how is it adjusted and what is the "new metering gasket"?
     
    I spoke with a rep from Jacks and have ordered the correct diaphragms and associated gaskets but it's not a stocked part so looks like it will be about 2 weeks before I get them.  The rep stated that most people just replace the entire carb but that comes to a little over $100 with shipping so I'm trying the new gaskets and diaphragms first.  Is this a simple R&R of the existing gaskets and diaphragms or is there something else I need to adjust, metering lever height?
    AVB
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    Re: Problem with 455 Chainsaw - Advice Please 2019/09/12 12:48:45 (permalink)
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    MarkP
     
    Thanks for the reply,
    Not very knowledgeable about all this so I really don't understand your reply.  What is the 500-529 Tool? and what is the metering lever height, how is it adjusted and what is the "new metering gasket"?
     
    I spoke with a rep from Jacks and have ordered the correct diaphragms and associated gaskets but it's not a stocked part so looks like it will be about 2 weeks before I get them.  The rep stated that most people just replace the entire carb but that comes to a little over $100 with shipping so I'm trying the new gaskets and diaphragms first.  Is this a simple R&R of the existing gaskets and diaphragms or is there something else I need to adjust, metering lever height?



    First is a primer on the Walbro carburetor https://www.walbro.com/wp.../2016/01/WTseries.pdf.
    Use just the basics of servicing the carburetor.
     
    The meter diaphragm gasket is the paper gasket that is under the metering diaphragm. As 500-529 tool is the newer tool for setting the metering lever height instead of old older version 500-13 tool which is still needed for older carbs.
     

    The one on the top or left is the new tool.
    As for which carburetor it marked on its side as it actually model number. Normally I just order the kit for the Walbro carburetors instead going through Husqvarna. Usually much easier to get.
     
    post edited by AVB - 2019/09/12 12:50:52
    MarkP
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    Re: Problem with 455 Chainsaw - Advice Please 2019/09/12 20:18:32 (permalink)
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    Thanks that very helpful!
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