Weber Carburetor 32/36 Install Instructions - LC Engineering (2023)

For Safety Purposes:

  • Use clamps on all fuel hoses.
  • Do not use gasket sealers, use gaskets provided.
  • When removing old carburetor label all hoses and wires.
  • If Necessary, clean engine before installation.
  • Use Loctite on hardware inside air cleaner and intake manifold studs.
  • If rewiring is needed always use an insulated connector or tap.
  • Never allow dirt in the carburetor.
  • Do not over tighten jets or throttle linkage.
  • Never operate the engine without a fuel filter.
  • Do not allow fuel to spill or leak.
  • Be careful not to cut or dent the aluminum gasket surfacesof the intake manifold or carburetor.
  • Always wear eye protection.

This section should be completed before you install this Weber Conversion Kit.

  • Please make sure that the Parts were not damaged in shipment.
  • Please check the contents of the kit against the picture on page 1.
  • If any parts were missing or the parts were damaged in shipping please contact your Weber Dealer.
  • Verify that your vehicle had a recent tune up and you do not have any other mechanical problems. The Weber Carburetor can not fix engine, and ignition problems.
  • Weber Carburetors require 2.5 p.s.i. of Fuel pressure. If your fuel pressureis more than 2.5 p.s.i, obtain a Fuel Pressure Regulator from your Weber Dealer.
  • The electric choke and idle cut-off solenoids require a key hot 12-Volt source.
  • Connect the electric choke to the Vehicles existing electric choke power source using a jumper wire.
  • You must remove the EGR valve pipe. The manifold will be sealed with the plate provided in the kit. (check local laws )NOTE: You should have no exhaust gas leaking from the EGR.
  • Weber Carburetors are preset at the Factory.Only make adjustments to the carburetor after the installation, and running the vehicle for the first time. After the carburetor is installed record the factory settings if needed in the future.
  • Please save your sales receipt and all carburetor documentation for future use.

Removal of old Carburetor:

(Video) How to hookup an electric choke weber carb 32/36 on a 22r 87 toyota

  1. Remove the Battery’s negative cable.
  2. Take off the original Air Cleaner Assembly.
  3. Remove the Fuel Supply hose that is attached to the carburetor and label it.
  4. Remove the Fuel Return hose and plug it.
  5. Remove and label the vacuum hoses connected to the carburetor.
  6. Remove and label all of the electrical connectors attached to the carburetor. Identify the electric choke wire.
  7. Remove the Float bowl Vent hose and plug it.
  8. Remove and label all electrical and vacuum connections to the vacuum switching valves and remove them along with the vacuum manifold.
  9. Remove the PCV hose from the Carburetor.
  10. Remove carburetor and all spacers and gaskets from the intake manifold. Place a clean rag in the intake opening to keep dirt and tools etc. out. NOTE: Do not forget to remove the rag before installing the Weber Carburetor.
  11. Remove the manifold studs from the intake manifold. Double nut each stud to remove. NOTE: Double nutting may ruin the nuts, however it will not damage the studs.
  12. Remove any excess gasket material from intake manifold. You can use a gasket scraper,wire brush and carburetor cleaner. NOTE: Do not use a wire wheel or any power tools as they may damage the manifold.

Weber Carburetor Installation:

  1. Install the EGR plate on the intake manifold, and screw the vacuum fitting into it.
  2. Remove the adapter plates, gaskets and hardware from the packaging. Please see picture for order of installation.
  3. Mount the first adapter and gasket to the intake manifold making sure that the allen head bolts are flush. Mount the top adapter and gasket to the bottom adapter plate.
  4. Remove the carburetor from the box, locate the throttle lever and fold back the lock tab and remove the throttle lever from the carburetor and replace it with the throttle lever that is supplied with the kit. NOTE: Do not over-tighten the nut for the throttle lever linkage, binding may occur.
  5. Install the Weber Carburetor on the four mounting studs. Using a criss-cross pattern tighten evenly. Fuel Inlet Faces front of Vehicle. NOTE: Do not over-tighten.
  6. For 4 Wheel Drive trucks only. The original throttle cable bracket has to be raised. Use the spacers and allen bolts in the linkage kit. They mount under the bracket.
  7. Reinstall the throttle linkage rod to the carburetor.
  8. Throttle Linkage adjustments (cable or rod): While holding the choke plates open turn the throttle linkage by hand to release the fast idle cam from the screw then release the throttle lever. Now adjust the rod or cable until you have some free play. To check for full throttle operation have a helper hold the accelerator pedal to the floor and check the throttle lever by hand for additional travel, you can shorten the cable or lengthen the rod as required to eliminate additional travel. Hold the choke plates open and release the accelerator pedal and check again for any free play. NOTE: You must have free play in the cable or rod and throttle lever must returnto the idle position every time you press on the accelerator pedal. You should not go any further in the installation unless the throttle is working properly.
  9. If vehicle is equipped with an automatic transmission, make sure that the A/T kickdowncable pulls till its end when the accelerator is to the floor.
  10. Locate the fuel inlet pipe (see picture) on the carburetor and connect the supply line to it.
  11. Take the EGR hose and connect it to the fitting that was installed in the EGR plate.
  12. Locate the vacuum advance hose and connect it to the vacuum advance port on the carburetor. (see picture below)
  13. Locate any open vacuum ports and hoses and plug them. (check local laws) Locate the wire for the electric choke and connect to the electric choke.
  14. At this point make sure that all hose clamps are tightened and that all of the electrical connectors are connected and insulated.
  15. Reconnect the Battery’s negative cable.
  16. Crank Engine without starting and check for fuel leaks. NOTE: Do not go any further without inspecting and fixing.
  17. Remove Air cleaner from packaging. Connect plastic breather tube to air filter basethen bolt air filter base to carburetor using the four screws provided.
  18. Attach the breather hose from the valve cover to the air cleaner.
  19. Put the air filter element on the air filter base and attach the air cleaner top with the clips provided.
  20. To check the clearance between the hood and air filter, place some crumpled up aluminum on the air cleaner top and slowly lower the hood and check clearance.

Carburetor Adjustments: (see pictures for identification of components)

  • Only make the adjustments discussed here if necessary.
  • To set the idle speed make sure that the engine is warm, set the speed to the vehicle manufacturer’s setting. To raise the speed turn the idle screw (clockwise) in, and to lower the speed turn the speed screw (counter clockwise) out.
  • To set the idle mixture turn the idle mixture screw in slowly (clockwise) counting the amount of turns you make until the idle speed drops off. Turn the screwout (counter clockwise) counting the turns until the idle drops off again. Turn the screw now back in half the distance that you turned out. Now the mixture is set.
  • To set the fast idle make sure that the engine is cold. Press the accelerator pedalto the floor and let go. Start the engine (do not touch the accelerator pedal onceyou touch the accelerator after the engine is running the fast idle cam is disengaged. The engine should be revving between 2000 and 2500 Rpm’s. Turn off the engine. To adjust the fast idle speed turn the fast idle screw in (clockwise) to increase engine RPM, to decrease engine RPM turn the fast idle screw out (counterclockwise)Do not touch the accelerator and restart engine to check RPM.
  • The choke is Factory set. To adjust make sure that the engine is cool (below 68F) Turn the throttle linkage all the way to set the choke. The plates should be closed. Make a mark on the plastic choke cap and the carburetor where the two surfaces meet. Loosen the three screws one turn. Hold the throttle about one third open and start twisting the thermostat cap (counter clockwise) until the choke plates fully close, then slowly turn the cap 1/8” (you should feel the spring tension in the choke tightening). Retighten the three screws (do not over tighten). You may now have to go back and check the fast idle speed and adjust if necessary.

Trouble Shooting Guide:

(Video) How To Install A Weber Carburetor

In order to properly trouble shoot any suspected carburetor problems please double check the following:

If the vehicle will not start please check the following:

  • Check that the fuel pump is functioning properly.
  • Check with pressure gauge.
  • Make sure that the ignition system is functioning properly.

If the engine idles too fast or too slow or stalls please check the following:

(Video) How to install a weber carburetor

  • Make sure that you have no vacuum leaks. You should check all engine vacuum line connections and at the carburetor base (including the adapter plates).
  • Check all Carburetor adjustments. Idle mixture, idle speed, and fast idle. In this order.

If the engine idles fine but acts as if it is running out of fuel when driving please check the following:

  • If new fuel filter was not installed install one now. The old fuel filter may be clogged.
  • Check that the fuel pump is functioning properly.
  • Check with pressure gauge.
  • Check all fuel lines. Make sure that the lines are not pinched or kinked.
  • Check that the vehicle has not run out of gas.
  • Check the fuel tank venting system. (Refer to vehicle shop manual)

If the engine runs rough or sounds like it is missing at idle please check the following:

  • Make sure that you have no vacuum leaks. You should check all engine vacuum line connections and at the carburetor base (including the adapter plates).
  • Check the idle mixture adjustment.

NOTE: If you were not able to correct the problem with the information provided above contact your Weber Dealer. Also please remember that any additional engine modifications such as Headers, High Performance camshafts, free flow exhaust systems may require that the carburetor be re-calibrated.

(Video) First Start - Toyota 20R Weber 32/36 Carb - 1977 Pickup/Hilux/Chinook]

(Video) Weber 32/36 carburetor installation

FAQs

How do you adjust a Weber 32 36 carburetor? ›

Rotate the Idle Speed screw counter-clockwise, until tachometer reads about 600-700 rpm's (as low as it can idle, with the engine still running). Next rotate the Idle Mixture crew (3b), also known as the fuel mixture adjustment screw) clockwise, until the engine runs rough.

What is a Weber 32 36 carburetor? ›

Perfect for stock or mild performance engines, the Weber 32/36 DGV carb is a progressive down-draft carburetor with counter-clockwise rotation. As a progressive carb it operates as a one barrel most of the time, with the second barrel only opening when more power is needed, or under wide open throttle.

Where are part number on a Weber carb? ›

Where is the model number on my Weber carb? On downdraft carburetors, Weber stamps the carburetor model number on the side of the base flange. Sidedraft carburetors have the model number stamped on the top, outboard of the jet cover. Note that the stamp on the downdraft may be facing the engine.

Is Weber carburetor still in business? ›

Genuine Weber carburetors were produced in Bologna, Italy, up until 1992, when production was transferred to Madrid, Spain, where they continue to be made today.

What do the H and L screws do on a carburetor? ›

However, if you have an older saw, here's how to quickly tune it yourself. Start by locating the three adjustment screws. They are typically labeled L (low speed jet), H (high speed jet), and I (idler jet).

Does a new carburetor need to be adjusted? ›

Even if a carburetor is brand new, it still needs tuning. Your engine, its condition, your location, and the weather all come into play and the carburetor needs to be adjusted properly.

What size jets are in a Weber 32 36? ›

Weber 32/36 DGV / DGAV carburetors in racing applications typically use a 55 primary idle jet and a 50 secondary idle jet. Sold individually. Idle jet holders are available separately.

How do you set up a Weber carburetor? ›

First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). The engine should pick up speed and begin to smooth out. Back out ½ turn more, or until the screw does nothing or runs worse then turn back to the point where it ran its best.

How much fuel pressure does a Weber carb need? ›

The Weber carburetors are very sensitive to fuel pressure. The needle and seat will not take more than 2.5 - 3.5lbs of fuel pressure. If higher fuel pressure is attempted, the carburetor will flood or poor running condition and poor fuel mileage.

How many CFM is a Weber 32 36? ›

Rated at 240 CFM flow.

What is my Weber model number? ›

The serial number consists of one or two letters found on the lid damper, plus the bar code containing 5 or 6 numbers, under the control panel. Located on the rear panel. Also located in the upper right-hand corner of owner's manual. Older units had a bar code underneath the stainless steel charbin cover.

Why are Weber carburetors so good? ›

The interesting thing about Weber carburetors is how basic they are. They're 100 percent mechanical, no software needed. You tune them with a screwdriver and a handful of jets. Down the road you go—done, nothing fancy, no laptop required.

Why do Weber carbs spit back? ›

Popping/spitting back through the carbs usually means the idle jets and circuit are too lean. Install bigger jets if you have them, but also try adjusting the idle mixture screws.

Does a Weber carb improve performance? ›

Referred to as the low speed circuit by Weber, this circuit is responsible for 80% of the driving operation. This is the reason that the Weber should give a fuel economy improvement over most factory carbs along with significant performance gains.

How do you tell if a carburetor is rich or lean? ›

If the mixture is too lean, it will leave no color, while a rich mixture will cause the fuel ring to become more prominent. Over-rich mixtures will give the plug a sooty appearance.

Do idle mixture screws adjust air or fuel? ›

With the engine at normal operating temperature, adjust all the idle mixture screws until the engine idles at the desired rpm with the highest manifold vacuum. Once that's achieved, lean the air-fuel mixture by adjusting the mixture screw clockwise a tiny amount for each adjustment screw.

What will happen if the carburetor is not properly adjusted? ›

Depending on the make and model of the vehicle, different carburetors may have multiple, sometimes up to four, air fuel mixture adjustment screws. These screws are responsible for controlling the amount of fuel that enters the engine, and improper adjustment will result in decreased engine performance.

How do you adjust a new carburetor? ›

If your carburettor has a main jet adjustment screw at the base of the float bowl, turn the screw clockwise until you feel it just touch the seat inside the emulsion tube. Then, turn the screw counterclockwise 1 to 1-1/2 turns. Replace the air cleaner assembly and start the engine for final carburettor adjustments.

How do I know what size jet carb I need? ›

Consult your manual first to find the stock size. Also pay attention to the numbers on the side of your old jets, which you'll be able to see in the steps to come. A larger jet number means a bigger hole and more fuel. A smaller jet number has smaller holes and should be used if your engine needs to run leaner.

What do air corrector Jets do? ›

The main air correction jet provides air for emulsification of the fuel delivered by the main circuit. The resulting emulsified fuel is readily vaporized upon its entry into the low pressure region at the waist of the main venturi.

What are the two adjustment screws on a carburetor? ›

There should be two screws on the front of the carburetor, which are used to adjust the air and fuel mixture. Often these look like flat-head screws and you can use a screwdriver to turn them, adjusting the amount of fuel and air mixing in the carb.

Should the bottom vents on a Weber be open? ›

Most Weber barbecues have vents on both the lid and the bottom bowl. If you are a beginner, leave both the top and bottom vents fully open. As you become more experienced, try permanently leaving the bottom vent fully open and using the lid vent to control the temperature.

What happens if a carburetor has too much fuel pressure? ›

If your fuel pressure is too low, you run the risk of running the fuel bowls dry. If the pressure is too high, it can force too much fuel into the engine. That can cause fouled spark plugs, among other issues.

What is the correct fuel pressure for a carburetor? ›

Setting Fuel Pressure

Your system's fuel pressure should be generally set between 6 and 8 psi (measured at the carburetor) for a street engine (higher for a race engine). Keep in mind that fuel pressure is not fuel volume. Your pressure reading is only an indication of the level of restriction in the system.

Is higher CFM better for airflow? ›

A higher CFM is always better for your kitchen fan. You can always run a high CFM hood on lower settings. It provides great ventilation by moving a heavy amount of air per minute. If you cook often or enjoy Asian cooking, a high powered fan is essential to keep grease out of your kitchen exhaust system.

How many CFM do I need for 300 hp? ›

Flow(cfm @ 28 in)PowerPotential (hp)
150308.6
200411.4
250514.3
300617.1
5 more rows
21 Aug 2013

How many CFM do I need carburetor? ›

To arrive at the most appropriate carburetor choice, there's a basic formula: engine displacement multiplied by maximum rpm divided by 3,456. For example: a typical 355ci small-block—a 0.030-over rebuild—with a 6,000-rpm max engine speed would work well with a 616-cfm carb ((355 x 6,000) 3,456 = 616.32).

Do all carburetors have the same bolt pattern? ›

Carburetors have a variety of bolt patterns (measured by length and width) and it's important to note you allow adequate space for throttle blades to open/close without binding.

What is the bolt at the bottom of a carburetor for? ›

This specially drilled bolt allows fuel to the main jet and provides a path to cut off in the event of a low oil shutdown.

How do I find the model of my carburetor? ›

It's like a "VIN" for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. The list number typically is four to six digits long and may or may not have a suffix number behind it.

How do you tell what year my Weber is? ›

The code consists of two letters + seven numbers—two letters represent the model year using the word “CONSUMABLE” as the key and seven numbers as a serial number. The code is laser-etched on the gas burner.

Which Weber model is best? ›

The Best Weber Grills in 2022
  1. Best Overall: Weber Genesis E-325s. Feature. Rating. Feature. ...
  2. Best Budget: Weber Spirit II E-310. Feature. Rating. ...
  3. Best Upgrade: Weber Summit S-670. Feature. Rating. ...
  4. Most Versatile: Weber Genesis E-435. Feature. Rating. ...
  5. Best Pellet Grill and Smoker: Weber SmokeFire EX4 (2nd Generation) Feature. Rating.
9 Apr 2022

What is the rarest Weber grill? ›

Not only is this cow skulled beauty the rarest of rare – it's also in fantastic condition. According to the Weber Timeline, the Westerner became available in 1958.

How much horsepower does a Weber carb add? ›

With the right setup and carbs you can make 10-35 hp over a single carb motor.

How long does a Weber cartridge last? ›

Each canister lasts up to 3 hours, ideal for camping trips and picnics.

How much better is fuel injection than a carburetor? ›

In general, a good fuel injection system is more accurate than a carburetor. This system delivers exactly the amount of fuel needed, no matter the conditions, meaning better reliability and fuel economy. A carburetor cannot adjust for the fuel intake ratio, so is less accurate.

Should you clean Weber grill after every use? ›

We recommend cleaning your cooking grates every time you use your grill. Simply preheat the grill on high for 15 minutes, with the lid closed, and then brush the grates clean with a Weber Stainless Steel Grill Brush.

Why does my carburetor backfire when I accelerate? ›

1. Lean Air/Fuel Mixture. Not only can a rich air/fuel ratio cause a backfire, a mixture that doesn't have enough gasoline can cause a backfire, too. A "lean" mixture is one that doesn't have enough fuel, and too much air.

What causes popping through carb? ›

Assuming all of your plugs and wires are in the correct locations and you haven't messed with the timing at all, then the most common cause of backfiring through the carb (spitting or coughing) is in the morning when a carb's air/fuel mixture is a bit too lean. This usually goes away once the engine warms-up.

What is a Weber 32 36 carb? ›

Perfect for stock or mild performance engines, the Weber 32/36 DGV carb is a progressive down-draft carburetor with counter-clockwise rotation. As a progressive carb it operates as a one barrel most of the time, with the second barrel only opening when more power is needed, or under wide open throttle.

How do you adjust the carbs on a Weber grill? ›

First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). The engine should pick up speed and begin to smooth out. Back out ½ turn more, or until the screw does nothing or runs worse then turn back to the point where it ran its best.

How do you balance an air and fuel carburetor? ›

Find the adjustment screws on the front of the carburetor.

There should be two screws on the front of the carburetor, which are used to adjust the air and fuel mixture. Often these look like flat-head screws and you can use a screwdriver to turn them, adjusting the amount of fuel and air mixing in the carb.

What causes air to mix with fuel in a carburetor? ›

Thanks to the venturi, there is enough of a vacuum inside of a carburetor for the air passing through it to steadily draw gas from the jet. Found inside of the venturi, the jet is an opening where fuel from the float chamber can mix with air before entering the cylinders.

What happens if the air-fuel mixture is too rich? ›

Too much fuel in the air/fuel mixture can make your vehicle surge, sputter, or even stall. For example, if the carburetor is set way too rich, it will push enough gas through to the combustion chamber and flood the engine. Your engine power might lag if the engine is being flooded while you're driving, as well.

What is the correct air to fuel ratio? ›

The stoichiometric mixture for a gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air. For gasoline fuel, the stoichiometric air–fuel mixture is about 14.7:1 i.e. for every one gram of fuel, 14.7 grams of air are required.

What should fuel pressure be for Weber carburetor? ›

The Weber carburetors are very sensitive to fuel pressure. The needle and seat will not take more than 2.5 - 3.5lbs of fuel pressure. If higher fuel pressure is attempted, the carburetor will flood or poor running condition and poor fuel mileage.

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