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Old May 31, 2019 | 04:45 PM
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Motorcraft carb identification

I have a motorcraft 2 barrel carb venturi size 1.21 on the base ots stamped 3MDA trying to see if it's a 2150 or 2100 and if it would be a decent carb for a 390 engine
 
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Old May 31, 2019 | 05:12 PM
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Originally Posted by Josh3240
I have a motorcraft 2 barrel carb venturi size 1.21 on the base ots stamped 3MDA trying to see if it's a 2150 or 2100 and if it would be a decent carb for a 390 engine
D0AZ-9J549-C .. Choke Pull-Off Diaphragm (Motorcraft CK-1283) ^^^

1973/74 Motorcraft 2100 series 2V = F100 302/F100/350 360/390 // Bronco & Econoline 302 & misc Passenger Car 302/351C/351W/400.

The carb ID tag is missing (as usual). It was triangular shaped, bolted to the air horn using one of the two screws at the right.

Diaphragm was used 1970/74 2100, but this is a Motorcraft carb. 1970/72 would have had an Auto-Lite 2100.

Carb kit is the same for all 1962/74 2100's, diaphragm did not come in the kit.
 
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Old May 31, 2019 | 05:44 PM
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Thank you for your time and knowledge
 
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Old May 31, 2019 | 06:10 PM
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Will work like a champ on a 390.
 
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Old Jun 6, 2019 | 09:12 AM
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One thing to look before bolting it on is excessive wear of the throttle shaft rod, or actually wallowing out the carburetor body itself, it will cause a vacuum leak that can't be tuned around. Otherwise, clean it up and set it up according to Hoyle, and it will work great!

Carb Rebuilding - The Ranger Station







 
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Old Jun 13, 2019 | 03:10 PM
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atch
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It's a little late for the op, but here's the difference between a 2100 carb and a 2150:


For those who don't want to watch the entire video (it's only 3.25 minutes, though) the carb pictured in the link above is a 2150 and the pic below is a 2100. There are other differences but the base shape gives it away instantly.




And; b-t-w; my Ford 360 cu. in. F-250 engine has a 2100 on it and works great. I doubt that the 390 would be much different. After all, what's 30 cu. in.? (insert your own sarcastic emoji here)
 
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