09
Sep
These carbs have plungers with a rubber cap that open. This video explains the steps in properly setting your electric choke on your carburetor for the best performance possiblePrestige Motorsports is a performa.
There is an idle speed screw that adjust the opening of the throttle plate and an idle mixture screw that limits the flow of fuel at idle.
How to adjust choke on carburetor. This video explains the steps in properly setting your electric choke on your carburetor for the best performance possiblePrestige Motorsports is a performa. In this video ill show you how to set the mechanical choke on a Rochester Quadra jet 4 barrel carb this also applies to the electronic chokes on all Rochest. How to adjust the chokeenricher system on Mikuni carburetors on snowmobiles and some other machines.
These carbs have plungers with a rubber cap that open. Get parts for your Mercar. Step 1 Open the hood of the car and remove the air cleaner.
On the right side of the carburetor locate a black round disc held in place by three screws. Two wires are plugged into the disc and provide power to heat the internal coil that expands and contracts to open and close the choke plate. The Components The choke circuit consists of the butterfly or choke plate the pull-off also called a vacuum break the choke spring and the fast-idle cam and screw.
The choke plate should fully and easily close against the air horn when the throttle is opened slightly and the spring has tension on it. Find the idle adjustment screw. There is an idle speed screw that adjust the opening of the throttle plate and an idle mixture screw that limits the flow of fuel at idle.
You want to adjust this second screw. As always consult the owners manual or shop guide for your make and model if you cant find the screws. Watch the butterfly valves inside the carburetor while turning the automatic choke element clockwise until the butterfly valves are standing straight up.
Turn the choke element counterclockwise until the butterfly valves are fully closed. Tighten the three automatic choke element screws with the screwdriver. Slightly crack the throttle open unload the fast idle cam and turn the choke cap clockwise until you see the choke plate open.
Then rotate it back slowly until the choke plate just comes closed. At that point you can go ahead and snug those screws back up and thats going to give you a good starting point to make adjustments from. How to Adjust a Weber Carburetor Choke Step 1.
Allow the choke assembly to cool completely if the engine has recently been running. Loosen the three screws surrounding the choke ring with a hex head screwdriver. The choke ring is the raised.
Hold the throttle open by pulling back. Video showing the common methods of installing throttle and choke cables on both the auto choke and manual choke engines how to adjust them and how to chang. Clean the jet and screw using the carburetor cleaner as well as the carburetor passages.
Reinstall the Idle Jet fully screw in the Idle Mixture Screw lightly bottoming out the screw and back it off 2 full 360 degree turns. 4 Next check the adjustment and full operation of the carburetor acceleration linkage. On start up Setting An Automatic Choke adjust fast idle speed to manufacturers specifications usually found on a sticker in the engine compartment.
If you cannot find your specs 1800 rpm is a safe speed to set it at. Wait for about 3 minutes and your choke blade should be completely open blade straight up and down. These electrical chokes have the ability to be adjusted.
There are three screws around the cover of the choke spring housing. With the engine cold loosen the screws in the cover. If the choke stays on too long or does not come all the way off then turn the choke housing clockwise until the choke just begins to open and stop and tighten the screws.