How to Adjust & Troubleshoot a Golf Cart Carburetor

How to Adjust & Troubleshoot a Golf Cart Carburetor

(Last Updated On: July 17, 2020)

How to Adjust a Golf Cart Carburetor

The way to adjust the carburetor on a golf cart will depend on the model of golf cart. In most cases, you’ll need to adjust the jet pilot screw, perform a valve clearance adjustment and then clean the carburetor.

 

Bad Golf Cart Carburetor Symptoms

  1. The engine shows a reduced performance such as a reduction in fuel efficiency or power and sluggish acceleration.
  2. The engine starts overheating or backfiring that causes the carburetor to produce a lean mixture with insufficient fuel.
  3. The exhaust emanates black smoke because the engine utilizes excess fuel or runs rich.
  4. The golf cart experiences hard starting because of an improper air-fuel ratio.

Troubleshooting Golf Cart Carburetor Problems

Problem Cause Solution
Gas leak • Worn, damaged or blocked inlet valve, float mounting tang, float pin, float, float bowl gasket, vent tubes
• Dirty valve seat
• Replace worn, damaged or blocked parts
• Clean the alve seat
Poor acceleration • Blocked gas passages and low -speed tubes or jets
• low gas levels
• air filter dirt accumulation
• Replace worn, damaged or blocked parts
• Clean the valve seat
Bad combustion through exhaust • Dirt in carburetor
• Block in gas or air filter
• Contamination in filter, hoses or gas tank
• Clean up carburetor
• Replace filter
• Replace or clean components
Poor high/low speed performance • Problematic gas pump
• Incorrect gas level in the float bowl
• Contaminated hoses, gas tank, gas filter, pilot port, low-speed jet
• Loose low speed jet
• Pump replacement
• Float adjustment
• Clean the contaminated parts
• Jet tightening
Poor gas economy • High gas level
• Choke partially open
• Loose jets
• Float adjustment
• Choke adjustment
• Jet tightening
Surging Linkage problem with the governor Check and adjust accordingly. Replace if needed.
Power loss (no air/gas) • Gas pump problem
• Blocked gas filter
• Dirty/blocked air filter and inlet
• Pump replacement
• Filter replacement
• Filter cleaning/replacement

EZGO Gas Cart Carburetor Adjustment

  1. Adjust the idle jet pilot screw on the carburetor. This can be done by doing a 1/4 turn of the screw.
  2. Do a valve clearance adjustment starting with the cold valve. The valves can be adjusted using a flat screwdriver, a feeler gauge and a 10mm wrench. The two inner exhaust valves and the outer intake valves must have a clearance of 0.004 mm.
  3. If the locknuts in the MCI engine have a size of 9mm and square heads, you’ll need a pair of needle-nose pliers and a 9mm socket.

 

1995 Gas Club Car Carburetor Adjustment

  1. Start the adjustment with the mixture screw in a slightly seated position. Turn it outside by 1-1/2 turns.
  2. Continue adjusting outward or inward in small increments.
  3. Check the air filter housing and the intake hose to ensure that they don’t have any air leak.
  4. Replace the fuel filter if needed.

 

How to Adjust Yamaha Golf Cart Carburetor

Yamaha G9 Carburetor Adjustment

  1. Pull out the pilot adjustment screw. It must be present at a sharp point and not a flat spot.
  2. Rethread the screw back until it’s slightly seated.
  3. Turn the screw outwards by 1-1/2 turns.
  4. Push the throttle stop screw backward until the throttle shaft is closed completely.
  5. Turn the screw in by a 1/4 turn.

 

Yamaha G1 Carburetor Adjustment

  1. Unscrew the air mixture screw. The screw has a smooth point when the spring is installed.
  2. Turn the screw in until it comes to a slightly seated position.
  3. Turn the screw outwards by 1-1/2 turns.
  4. Push the throttle stop screw backward until the throttle shaft is closed completely.
  5. Turn the screw in by a 1/4 turn.
  6. Blow air into the fuel inlet until the float rises to be level with the carburetor base.

 

1995 Yamaha G14 Carburetor Adjustment

  1. Adjust the needle valve with 1-1/2 turns in the outward direction.
  2. Adjust the valve on top of the throttle body with a 1/4 turn in the inward direction.

 

2003 Yamaha G22 Carburetor Adjustment

  1. Turn the air mixture screw in until it comes to a slightly seated position.
  2. Turn the screw outwards by 1-1/2 turns.
  3. Push the throttle stop screw backward until the throttle shaft is closed completely.
  4. Turn the screw in by a 1/4 turn.

 

Yamaha Golf Cart Carb Vs EFI

  • The carb model is more powerful as well as starts and goes faster when compared to the EFI. The EFI experiences delay to start moving when the pedal is pressed.
  • The carb model releases more exhaust fumes than the EFI model.
  • The carb model requires the choke to be pulled for starting the cart after it has been idle for days. This is not required for the EFI cart.
  • The carb model doesn’t support any means of assessing how much air is received by the engine. In contrast, the EFI model uses sensors to analyze how much air comes in and delivers the right amount of fuel for the best and cleanest burn.
  • The carb requires more maintenance than an EFI because of the cleaning and rebuilding of the carburetor involved. In the long run, serviceability can be challenging and parts can be more expensive for the EFI.
  • The carb model golf cart generally has a less effective throttle smoothness and response when compared to the EFI.
  • The carb model costs less than an EFI and is apt for those who aren’t interested in buying an expensive cart.

 

How to Adjust EZGO Golf Cart Carburetor

2003 EZGO TXT Carburetor Adjustment

  1. Check the valve adjustment for proper compression using a compression tester. You will have to pull out the plugs and put the tester inside.
  2. Push the gas pedal downwards completely for 3/4 seconds and check the reading to see if it’s 160lbs or better.
  3. Clean the carburetor thoroughly and replace the main jet if needed.

 

1993 EZGO4-stroke 295cc Engine Carburetor Adjustment

  1. Position the golf cart to idle mode and set the low idle air adjustment according to your preference, for the engine to be able to pick up properly. This adjustment can be found on top of the carburetor. Often, two turns outward from the seated position is a good starting option.

           There will be a movable screw on top of the carburetor at its center. This screw comes with a removable plastic cover.

  1. Check to see that the air cleaner has been installed.

 

2004 EZGOMCI Engine Carburetor Adjustment

  1. Adjust the jet pilot screw on the carburetor by doing a 1/4 turn on it.
  2. Do a valve clearance adjustment for both the outer intake valves and the inner exhaust valves. The inner exhaust valves and the outer intake valves must have a clearance of 0.004 mm.

 

1987 EZGO TXT Carburetor Adjustment

  1. Remove the carburetor and turn it upside down.
  2. Remove the nut that is used to secure the bowl on.
  3. Check the float for a puncture as this prevents the activation of the fuel cut-off needle valve.
  4. Replace the float if there is a puncture.
  5. Check for dirt accumulation in the needle valve.
  6. Remove and clean the nozzle as well as the main jet.

 

EZGO Golf Cart Carburetor Diagram

The EZGO TXT gas golf cart carburetor diagram shows just one adjustment on the engine. This is present above the carburetor towards its rear.

In a 2-cycle cart, this is the idle circuit and is initially set for 1-1/2 outward turns.

The main jet in the carburetor diagram of a 4-cycle engine is located below the carburetor while the pilot jet is present on top of it. The needle valve and float pin are also housed under the carburetor.

 

How to Adjust Club Car Golf Cart Carburetor

1998 Club Car Carburetor Adjustment

  1. Locate the air/fuel mix that is nearest to the engine. This screw will be at a steeper angle compared to the other screws.
  2. Turn the screw inwards slowly until you hear a prominent change in the engine sound.
  3. Turn the screw outwards and count the number of turns until there is another noticeable change in the sound made by the engine.
  4. Turn the screw back inwards with half steps until it goes in up to the middle.

 

1997 DS Club Car golf cart

  1. Remove the two torx screws that keep the aluminum cover present over the cable area and the throttle shaft that is in place.
  2. Disconnect the fuel line. However, ensure that it’s fastened above the fuel level in the tank during reassembly.

 

Columbia Golf Cart Carburetor Adjustment

1987 Columbia Golf Cart Carburetor Adjustment

  1. Check for full winding of the throttle spring present on the carburetor. It should open up fully when there is no load acting on it.
  2. Address the cable flexing problem by following one of the methods mentioned here.

 

  • Remove the cable from the carburetor and cover its sheath opening using duct tape. To do this, make a small funnel with the tape and ensure that the wire sticks out from its middle.
  • Loosen the nut that fixes the cable on to the mount housed on the motor just before its entry into the carburetor. Adjusting the cable slightly to the right or left can be helpful.

1983 Columbia gas golf cart

  1. If you’re changing from the Walbro carburetor to the old-style Tilloston carburetor, you can follow the steps mentioned here.
  • Change the intake manifold so that the metering or fuel pump system gets powered.
  • Use a low-pressure electric fuel pump to ensure that the carburetor remains fueled.
  • Connect an adapter to the air cleaner.
  1. If you’re changing from the Walbro carburetor to the Mikuni carburetor, the process is much simpler.
  • Bolt the new carburetor on to the present intake manifold directly as both the carburetors have identical bolt patterns.
  • Flip the choke lever of the Mikuni carburetor from side to side for about half a minute.

 

1985 Columbia gas golf cart

The cart makes use of a Walbro carburetor with three-line vacuum pumps with connections as follows.

  • One vacuum pump is connected from the gas tank to the fuel pump.
  • The second vacuum pump is connected from the fuel pump to the carburetor.
  • The third vacuum pump is connected from the crankcase to the fuel pump.

Most golfers prefer to replace the third mechanical pump with an electric pump and seal the crankcase line.

 

How to Clean a Golf Cart Carburetor

Items needed

  • A spray carburetor cleaner
  • Screwdrivers
  • Metric wrenches
  • Small plastic containers
  • Utility brushes

You may need a gasoline filter, a rebuild kit and an air-filter cartridge for replacement.

 

Procedure

  1. Turn off the golf cart engine and allow it to cool for a couple of hours before you start working. This cooling down prevents damage to the cart and injury to yourself when you’re at work.
  2. Turn off the fuel-supply valve and remove the fuel line to prevent flooding of the fuel and other complications.
  3. Remove the bolt connecting the air cleaner to the carburetor using a box wrench.
  4. Remove the air cleaner followed by the float bowl. You’ll need a screwdriver to remove the float bowl present at the carburetor bottom.
  5. Remove the main and idle jets connected to the carburetor. Their positions vary based on the model of the golf cart.
  6. Clean the inside of the float bowl with a spraying action using a spray carburetor cleaner. Also, remove any remaining buildup using the utility brush.
  7. Wipe the float bowl with a clean rag and ensure that the idle adjustment screw is tight using a flat screwdriver. Make sure to note the number of turns it takes for tightening. Remove the screw from its place.
  8. Clean the inside and outside of the carburetor using the cleaner and brushes as mentioned above. The ports can be cleaned by setting the tube nozzle setting for the spray can.
  9. Rebuild the carburetor using the rebuild kit and following the instructions given in the manual along with the kit.
  10. Put the remaining parts in their appropriate positions in the reverse order of removal.

First, fix the float bowl back to the carburetor bottom. Tighten the idle adjustment screw using the same number of turns observed in Step 7. Follow up by putting the replacement cartridge inside the air cleaner and the air cleaner on the carburetor. Finally, attach the fuel line and turn the fuel valve on.

How to Remove an EZGO 1987 Carburetor

The carburetor in an EZGO 1987 golf cart can be removed by following the instructions given for doing this in the cart’s user manual.

The cable that is used for connecting the choke pull has a small cylinder with a set screw that holds it to the end of the cable.

You can spray some cleaner to clean this area and use a small Allen wrench to remove the screw.

 

How to Remove Carburetor on a 1993 EZGO Marathon

  • Move the starter to the front of the golf cart.
  • Pull the stud bolt of the carburetor gently.
  • Turn the carburetor and remove it.

 

Why Do Carburetors Flood?

The reason why a carburetor floods on a golf cart is usually due to a faulty fuel pump.

  • High fuel pressure because of a faulty or malfunctioning fuel pump

The pump must be repaired or replaced accordingly. Seek professional assistance if required.

  • Dripping fuel when the engine is shut off

This is usually due to the proximity of the fuel line to an exhaust manifold, a radiator hose or a heat source. Professional expertise is required to check and rectify this problem.

  • A defective float due to an excessively long tang getting entangled in the webbing.

The tang must be shortened and the float drop must be adjusted. Replace the floats if needed.

 

How to Fix a Flooded Golf Cart Carburetor

2002 gas Club Car Carburetor Flooding

  1. Clean the block or clog in the plastic vent hose connected to the carburetor.
  2. Replace the air filter if it’s damaged as this can cause air to leak.
  3. Replace the existing spark plug with a non-resistor type spark plug if it has soot accumulated on it.

 

2003 290cc engine gas Club Car Carburetor Flooding

  1. Clean the clog in the float bowl vent tube. Clogging will not allow the float to close the needle valve.
  2. Check that the choke in the airbox isn’t stuck and ensure that there is nothing in the airbox to obstruct the airflow.
  3. Check if the inlet valve is opening only partially resulting in fuel accumulation in the intake port.
  4. Check for a leaking valve seal that causes oil to drip back into the carburetor through the intake port.
  5. Check for valve needle seat not getting sealed resulting in the continuous flow of fuel even when the bowl is full.

 

1999 EZGO 2-cycle golf cart Carburetor Flooding

  1. Check for a leaking fuel pump diaphragm and if this is the case, replace the fuel pump.
  2. Restore the float to factory specifications so that it appears level from a side view.

 

1999 Gas Club Car Carburetor Flooding

  1. Check the float and float bowl for dirt accumulation and remove the trash in them.
  2. Check the carburetor to make sure that the air box is undamaged and sealed and the choke is in good condition. Do a replacement if needed.
  3. Ensure that the air inlet is free of debris, air tubes have no block and the air filter is clean and in good condition.
  4. Check if the needle causes fuel supply to get shut off by moving the float upwards. If not, replacing the float can help.

How to Fix a Golf Cart Carburetor that’s Leaking Gas

1990 EZGO 2-cycle gas golf cart

Remove the float bowl and release the float if it’s stuck. Also, consider removing and dismantling the carburetor to clean each part followed by assembly and mounting.

 

Yamaha G2

Check if the needle valve is getting seated properly. If not, replace the entire assembly. Sometimes, the float may also have to be replaced.

 

1988 KD82

Check if the float is stuck or the pin holding the float has got dislocated. If so, replace the float.

 

Yamaha G1 gas golf cart

  1. Ensure that the fuel lines are clean inside and install new fuel filters between the pump and the tank and carburetor and the pump.
  2. Shake the float and replace it if it’s filled with fuel as this will keep the needle open.
  3. Release air blocks in the fuel lines by pulling it and keeping it in a container under the carburetor followed by blowing into the tank till air gets cleared.

 

How to Fix Carburetor Overflow

2006 Precedent 350cc Gas Club Car

  1. Replace the existing fuel lines, fuel filter and clamps with new ones as cracks in the old parts cause leaks.
  2. Attach an inline shut off valve to the fuel line to stop the seepage.
  3. Remove the crude accumulated in the seat and needle in the gas tank as this causes pressure buildup in the tank due to plugging in the vent.

 

Yamaha G16

  1. Check if the float is filled with gas. This will not allow the float valve to function. Replace the float if you notice that it’s full.
  2. Fix a q-tip in an electric screwdriver or a drill chuck and dip it in some brass polish. Gently polish the area where the needle is seated.

 

Vegas Cart

  1. Pinch the return line slightly so that the bowl gets filled and stops the overflow.
  2. Put a T into the feed line that comes out from the electric fuel pump and remove the vent above the tank. Ensure that the T perfectly fits the rubber grommet.

 

1987 EZGO TXT

  1. Replace the float if it’s punctured and sinking. This could be because it has gas in it and fails to activate the fuel cut-off needle valve.
  2. Clean the dirt surrounding the needle valve that prevents it from closing as required.
  3. Check if the float or needle is stuck. If so, release them gently. You can also go in for a replacement.

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