Question about Echo Backpack Blower PB-770T
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Posted on Jan 02, 2017
Hi Billy. This is a problem with the float needle in the carb. See this link page 10 (Item 24): http://www.echo-usa.com/pdf/documentation/PB250es_P30911_070110.pdf Also item 15. Most likely there is either a hole in the diaphram or..... there is debris in the float needle seat that has to be removed. This is not a difficult repair but... it is tedious if you have to remove the float needle.
There is a repair kit for this WALBRO WTA33 carb. The part number for the kit is K10-WTA. See this link:
Most local lawnmower shops have these kits in stock but... ordering on line can save you time and money for the parts search.
I am most certainthat if you clear the debris from the float needle seat and the diaphram is good that your leak will cease. If you clear the debris and you still have the over-night / between use leak.... the diaphram will have to be replaced. All it takes is a pin hole over time for the cylinder to fill up.
There is a Walbro carb for the WT series "Service Manual" here:
Thanks for choosing FixYa,
Posted on Dec 24, 2010
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