Locate the curb idle speed screw and the idle mixture screw; both can be found at the base of the two-barrel Holley carburetor. Turn the screws carefully with a screwdriver or allen wrench depending on which type of screw your carb uses in a counter-clockwise direction, until the screws bottom out and you feel resistance.
Turn both screws clockwise 1 1/4 turns to use as a starting point to adjust the carburetor. Start the motor, letting it warm up for about five minutes.
Remove the rubber vacuum hose from the vacuum port on the side of the carburetor. Attach a vacuum gauge to the vacuum port.
Adjust the screws, moving them 1/8 of a turn at a time in a clockwise direction, alternating back and forth. Continue adjusting until both screws have readings of 600 RPMs on the vacuum gauge.
Remove the vacuum gauge from the vacuum port on the carburetor, by hand. Attach the vacuum hose to the vacuum port.
350 cu in with 2 barrel carb, 8 degrees at 1100 rpms 350 cu in with 4 barrel carb and standard transmission, 8 degress at 1100 rpms 350 cu in with 4 barrel carb and automatic transmission, 12 degrees at 1100 rpms
Any place that has constant vacuum Usually on the back side at the base of the carb.
If it is throtle body equipped, the idle control s solonoid controls it. If it has a carb there is an adjustment screw on the bottom of the carb.
kickdown cable. it connects to the linkage on the carb's throttle. as the throttle goes in the kickdown goes out.
If you have a 400 ci, the horse power was down to 250 with a 4 barrel carb.
With a Flat head Screwdriver
Mercurys were equipped with Autolite 4100, if a 4-barrel, or the Autolite 2100 if a 2-barrel. The Autolite 4100 is one of the finest carbs ever made. It was designed by Holley and is a square-bore carb similar to the HOlley 4150.
Go to this website: www.innovatemotorsports.com , and go to their tech forums.
There is no simple answer to this question, as the Holley is a universal carb and can be tuned to suit most any application. There are how-to books on this subject, and highly recommended for someone trying to tune one. Also, the Holley tech service library can be very helpful. http://www.holley.com/TechService/Library.asp
i used a holly 500cfm two barrel carb on mine and it worked just as well as a 4 barrel i used a holly 500cfm two barrel carb on mine and it worked just as well as a 4 barrel
there is a screw on the carb. be sure to adjust while the engine is running so you can tell by the idle when it is set properly.
Adjust or rebuild carb.
a double pumper is a 4 barrel carb. commonly made by holley. they were called this because they have two accelerator pumps. one on each float bowl on either end of the carb. most carbs do not have this feature, they usually only have one accelerator pump.
The 4180 Holley carb vacuum helps with transmission performance on heavy vehicles. This Holley 4180 carb is a secondary function attached to a transmission.
Yes, it's the Holley 1940. You can get them from Champion Carburetor.
it's the screw right above the mounting bolt on the left rear of the carb. you'll have to adjust the idle screw as well as you lean it out. then check your timing again
sounds like a chevy motor 250 cid. you can go original which was built by rochester, believe it or not a decent parts store could hook you up. if you want a bit more power tou can look at summit racing or jegs. holley, carter, edelbrock all make something for you motor you can even by a 4 barrel intake manifold and carb for about 50 more horse power , my suggestion by a nice holley 2 barrel carb and a carb adapter