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Discussion Starter #1
Hey guys, my acc pump is leaking from the diaphragm. I have a 69 Z 28 4053 Holley on my 69 Z 302. Do I need the 30 or 50 cc pump diaphragm? They also list if they put alcohol in the gas where you live. I am in Southern California and haven't a clue what they put in the gas here.

thanks for the assist

alan
 

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Discussion Starter #3
Also, on the fuel pipe that goes to each bowl from the fuel block, are there supposed to be copper washers for any of the 5 connections or is it just the flare to the block? Those things have always been hard to seal.
 

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It's just flare , and it's probably the accelerator pump housing is warped from heat, usually it's not the diaphram. Face the hsg off on a piece of glass with some 180 paper.
 

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Thannks Mike. I pulled the carb last night. The diaprhagm was really stiff and crappy. But I will check the housing for flatness. Good point!!!
 

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Discussion Starter #6
Per Holley, Tom was correct, a 30 cc diaprhagm and all Holley's rubber parts are now ethanol safe.

Thanks Guys!!!!:beers:
 
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