How do you identify autolite carbs?

The easiest way to identify which Autolite unit you have is by the aluminum tag mounted to one of the top air-horn screws. Ford numbers are six-digit and can be very revealing as to the carburetor’s history. The first digit is a letter, which indicates the decade.

How do you adjust the idle on a 2 barrel carburetor?

For 2 and 4 barrels with the engine running and at idle, start with either screw and turn it in a ½ turn (clockwise). Then go to the other and turn it in ½ a turn. You want to keep them equal.

Where to buy an Autolite 4100?

Probably the first thing that should be done is to go to the PonyCarbs website. It’s a marvelous place for those interested in the Autolite/Motorcraft 4100. I live in the UK and am seeking some advice. I recently acquired an Autolite 4100 off ebay here in the UK. It’s part number is C5AF H, which I think is from an auto 390.

Why did the 4300 carburetor fail?

The 4300 was design as an emmission carburetor and a bean counter dream, a few carburetors for many applications. This let to many, many problems with off balance issues for the differing applications. This carb suffered from off-idle flat spots poor, idle transitions and idle issues. It also suffered from choke issues.

How do I adjust the dashpot on my carburetor?

Our universal dashpot may need the stem cut down in order to fit your carburetor. Once that is accomplished, adjust as in the following: Loosen the dashpot nut. Open choke plate manually, and hold the throttle plate closed. Measure the clearance between the throttle lever and the dashpot plunger tip.

What’s the difference between a 4100 and a Holley?

The relaiblility of the Holley as compared to the 4100 is really questionable at best. Finally because of all the adjustments possible and the differing settings it is very hard to precisley set a holley unless you have very sophisticated equipment beyong the reach of most backyard mechanics.