Author Topic: Walbro HDA-77 -- Titan 57 Carb  (Read 569 times)

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Offline Cut4fun .

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Re: Walbro HDA-77 -- Titan 57 Carb
« on: December 05, 2015, 10:20:58 pm »
I just put a new HDA-66 on an Echo 600p that Ive been playing around with.  Am I correct that the HDA-77 uses the nozzle style high side check valve and the HDA-66 uses the screen?  Both have the 15.8 venturi according to Walbro.  Both are listed as Mac carbs.       

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