Motorcraft 2100 4100 Diaphram Pump Assembly - AP279

I ordered this Tuesday afternoon and it was in my mailbox on Thursday. Part seems to work well once I realized screws were bottoming and the pump cover was warped. Corrected by rubbing on a wet stone.

Part was perfect and so far is working fine, it doesn't seem to be leaking, I will take the car out tonight and see how thing go. Tank you

Very pleased,arrived very quickly.

My local auto parts was not able to find the correct part for my carb. Thanks for the help Mike. It worked fine.

Hope this part is from a different manufacturer than the three I purchased from a carburetor overhaul shop in the past. Last one only lasted about 1000 miles. Works fine now, but only time will tell if it's reliable in the long term. BTW, the original diaphragm worked for over 25 years.

Part was exact fit. Price was great, delivery very quick. I enjoy the knowledge and customer service. Great videos for the novice such as myself, thanks Mike!

This item is high quality, better than I have bought elsewhere. I was pleased to see this and I'm confident this will be true of other items I will purchase.

I ordered this part for my 1966 Mustang, stock 289, after experiencing some slight hesitation at acceleration. I replaced the fuel filter but it didn’t seem to help. But after replacing the pump assembly, the issue is probably 75% improved. I’m a mechanical novice and screwed up by placing the diaphram on backwards, which was immediately noticeable after a test run. I then watched the recommended install video, realized my mistake and corrected it. All in all an easy part to replace for a noticeable difference.

I tried the two parts stores in my town and nothing worked. So glad I found your website and now my truck is running great! Thank you

Worked like a champ!