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Autolite & Motorcraft Carburetor Main Jet

Autolite & Motorcraft Carburetor Main Jet

Your Price:$4.50
In Stock
Part Number:120-4

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Motorcraft Jets
PRICE IS FOR ONE JET

1964 & newer models. This assumes you have a number matching carburetor.

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
Best carb parts
Love it!!! They came super fast and arrived much sooner than expected. Dropped them in the carb in about 15 min and solved the stumbling problem completely. Nice quality and it's great to know I can get the parts I need that are otherwise unavailable in my area. Old cars never die, thanks for helping keep me on the road.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Tennessee. on 5/25/2015
5/5
5 Stars
2100 Series Jets Size 55
Super high quality, better than the original sets in the carb! Don't hesitate these are excellent and Mike was even the person who called me back to discuss my issue!
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from California. on 9/9/2016
5/5
5 Stars
66 Mustang GT owner
In trying to improve MPG I tried various sizes of Jets from Mike's and they fit great.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from cypress cal. on 7/19/2015
5/5
5 Stars
Awesome Jets
Shipping was faster then expected and I ordered during the week overlapping Canada day and Independence day. I ordered 6 sets to help fine tune my carb post swap and once these arrived I was impressed with quality and the fact they could be tightened and removed multiple times without getting chewed up. These jets aren't readily available here and when putting a 2100 off a 390ci v8 (jetted 54) goes on 150ci L4 (final jet choice 45) you need jets. Great product and better service!!
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Canada. on 7/9/2015
5/5
5 Stars
As advertised
Ordered a set of 2 for the 2100. Improved performance by jetting down. Got here quick, as usual. Very happy with my purchase.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from New Mexico. on 5/26/2015
5/5
5 Stars
none
I purchased the # 49 and 50 jets. Installed the #50 jets first and fit great. I may try the # 49 jets later but the car is running fine. The quality is great and I will do business with this company again.
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Reviewed by:  from russell, n.y.. on 10/21/2016
5/5
5 Stars
_
Perfect fit! Finalized the Carb clean with this item (since it wasn't part of the standard rebuild kit)
Did you find this helpful? 
Reviewed by:  from PA. on 10/14/2016
5/5
5 Stars
Mr.
Jets arrived quickly. Have not installed as of yet. Looking to lower fuel consumption with these smaller jets in a 351W.
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Reviewed by:  from Atlanta, GA. on 9/7/2016
5/5
5 Stars
Jets
Fast service correct parts would recommend
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Reviewed by:  from Texas. on 8/31/2016
5/5
5 Stars
home mechanic
Could not locate these jets local so was glad to see they had them. Great service and speed. Product great as well. Getting ready to order again two more sizes
Did you find this helpful? 
Reviewed by:  from Gloucester. on 6/29/2016
5/5

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