Carb Question Following Rebuild

Check the vacuum diaphragm on the secondaries. Maybe it's got a leak that is causing the secondaries too slow.

I've pulled the vacuum diaphram housing off and looked at the diaphram itself. My first though was to put the old one back in, but the garbage man is long since gone.

The diaphram looks fine, and actuates when I suck on the port with the cork "O" ring. Is it supposed to hold a vacuum, or does it bleed down at a small controlled rate?

The cork "O" was replaced during the rebuild, and looks fine. Vacuum leaks are virtually impossible to see so I'd need to check it in operation.

To check for leaks in the system, I'd need to apply vacuum to the port in the carb barrel that ties to the diaphram. I was also thinking that a port may have become blocked during the rebuild. That's why I think the end to end check is needed. Know of an easy way to do it other than vaccum gun and hose held up against the port?

Do you guys think there is anything on the fuel side of the secondary circuit that would cause this condition? and how to check?

Danman,

I would never have thought of that. Now that my old parts are gone, I may have to experiment a bit. I'll head down to my local speed shop, which has been very helpful in the past, and see what they have for parts.

Do you recall if your original diaphram rod was shorter or longer than the rebuild kit. Any details you might have on you carb list number and the replacement parts would be a big help. If it was too long ago, I understand.

A little update, I've leak checked the entire secondary vacuum system and it's as tight as a drum.

Thanks again, I'll let you what I find.

Jeff