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Autolite & Motorcraft Carburetor Main Jet
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Autolite & Motorcraft Carburetor Main Jet

Part Number:120-4
review
22 Review(s)
5

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Your Price:$4.99

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Motorcraft Jets

Motorcraft main jets, 1100, 1101, 2100, 2150, 4100, 4300, 4350. Priced per each. These are ordered by size .048, .058, etc. You will find the current jet number stamped on the top of the jet. Order by selecting the jet size from the drop down list. Price is per jet.

These are 5/16" on the threaded end.

Some of the older 2100 & 4100 Autolites are much smaller. Typically 1963 and older (assuming you are 100% sure you know the year of your carb.). This type of 4100 will probably have a plastic lever going to the secondary diaphragm. This type of 2100 & 4100 jet can be found here.



Features
  • Made in USA
  • Number Stamped on Top

Your old jet may have the size stamped on the top or side. 50f=.050, 50=.050


Motorcraft 2100 Jet Sizes






Jet Testing
To determine if you have the correct jets in your carburetor, operate your vehicle for 20 minutes at sustained speeds. Stop and pull a plug. Gray - Good, Black - move down one jet size, White - move up one jet size. Do it all over again until you get a gray plug.

This assumes your engine and electrical system is in good running order.

Autolite 1100 Main Jet

Autolite 1100 Jet



5 Stars
Parts
Mike fast service parts were all there as ordered if you need tec info mike takes time out to talk to you as he did me Hes got my vote
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Reviewed by:  from Ky. on 5/17/2015
5/5
5 Stars
Customer
Very nice quality jets, fit my carburetor threads exactly. I read that modern fuel might require a somewhat larger jet than the original from 50 years ago, so I ordered a set 1 size larger to see what would happen. The car is running silky smooth now, but I also put in a premium carb kit at the same time, so I don't really know if it helped or hurt anything.
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Reviewed by:  from Phoenix, AZ. on 5/4/2015
5/5
5 Stars
The Dude
I ordered these Motorcraft jets to lean out my fuel mixture on my CJ7 to pass the good ol' CA emissions. Mike sent the parts very quickly in time for me to rebuild my carb and make my trip!
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Reviewed by:  from Apple Valley, CA. on 4/11/2015
5/5
5 Stars
President
Great fit and fast shipment. Thanks.
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Reviewed by:  from Grand Rapids. on 4/9/2015
5/5
5 Stars
Carb Jets for Autolite 4100
Very pleased with the quality of the product and how quickly they arrived.
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Reviewed by:  from Savannah, Ga.. on 2/22/2015
5/5
5 Stars
Good as new
Bought a pair of size 51 jets for a 66 Ford with a two barrel 2100 carb. These are as good or better than the originals.
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Reviewed by:  from Everett, WA. on 12/8/2014
5/5
5 Stars
motocraft jet
high quality item. perfect fit to my 2150
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Reviewed by:  from israel. on 9/1/2014
5/5
5 Stars
AutoLite 1100 68 Mustang 200 CI
Jets work perfectly and were a perfect fit. My inline six was running so rich that raw fuel was shooting out the exhaust pipe. I slowly worked my way down from a .065 to a .050 and have grey spark plugs on every cylinder. Im now getting 26 MPG. Very happy with the quality of parts, amazing customer service, and fast shipping.
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Reviewed by:  from Michigan. on 4/1/2014
5/5
5 Stars
052 Jets for Motorcraft 2150
These replacement jets fit perfectly and work well. They were shipped out quickly and arrived a day sooner than I expected. My truck was running far too rich and replacing the 055 jets with these 052 jets is just what it needed.
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Reviewed by:  from Chattanooga, TN. on 2/16/2014
5/5
5 Stars
Motorcraft jets.
Perfect fit and resolved problem I was having with carb. Not to mention I got them super fast. Thanks Mike!
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Reviewed by:  from Colorado. on 11/24/2013
5/5

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