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       #Post#: 81017--------------------------------------------------
       Echo/Walbro HDB
       By: copen Date: January 24, 2018, 9:48 am
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       This thing is driving me nuts. Saw will start and run high end
       but will not idle worth a darn. About the only way I can get it
       to idle is with the low spd needle way out and then it's very
       erratic. Have soaked and cleaned many times using everything
       from 2+2 to a new ultrasonic purchased just for this reason.
       Recently installed a Walbro carb kit thinking maybe I was
       missing something with the gaskets and diaphragm that I couldn't
       see. I've adj. the metering lever as well as I could and the kit
       had a new needle included. Sprayed WD40 around the mounting
       base, checking for air leaks while it was running and it made no
       difference. The saw no longer has points and cond. but a
       universal ignition module that I replaced because I'm running
       out of options. The first one was installed around 10 yrs. ago
       and worked perfectly. New one made no difference. The saw is a
       CS500VL, not in the recall range, and if it wasn't for this PITA
       problem, I'd be happy to keep using it.
       Any help would be greatly, GREATLY appreciated.
       Thanks, Bill
       Did I mention greatly appreciated?
       If I posted this in the wrong area, I apologize. Tried the Echo
       forum earlier and got no replies
       #Post#: 81069--------------------------------------------------
       Re: Echo/Walbro HDB
       By: jmester Date: January 27, 2018, 9:22 pm
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       Have you pressure checked the carb to make sure it is sealed. I
       may look into the check valve. I am not familiar with the hdb
       walbro carb.
       #Post#: 81079--------------------------------------------------
       Re: Echo/Walbro HDB
       By: 3000 FPS Date: January 28, 2018, 2:30 pm
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       Yep you might consider replacing the carb.   I would also
       pressure and vacuum check the crankcase before replacing the
       carb.
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