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Motorcraft 2150, 2 Barrel Idle Mixture Screw
Motorcraft 2150, 2 Barrel Idle Mixture Screw

Motorcraft 2150, 2 Barrel Idle Mixture Screw

Your Price: $4.95
10-32 x 1.262"
Part Number: 16-84
Availability: In Stock

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Motorcraft 2150, 2 barrel idle mixture screw. Please note that there are several idle mixture screws for the 2150. You will need to compare the size to make sure you are getting the correct screw. Price is per screw and you will need two. New springs are included.

Includes but not limited to carburetor numbers 4DM2-BA

Overall length: 1.262  10x32 threads.


Adjusting the Idle Mixture Screws

The idle mixture screws only affects idle. They simply control the amount of fuel and air mixture that is delivered at idle.

First run the screws in all the way until they seat, lightly. Too hard and you will damage the screw. Now back the screw out until the specified rpm is achieved. Turning the idle mixture screws clockwise (in) leans the idle mixture. Turning the idle mixture screws counter clockwise (out) richens the mixture.

Turn the mixture screws, alternating between the two in 1/4 turn at a time until the engine rpm starts to drop, then turn them back out 1/4 of a turn.


When adjusting your idle mixture screws doesn't seem to change the engine rpm much is an indication that there is something wrong and could be an indication of a needed rebuild.

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