Easy guide on how to change a carburettor yourself.
Estimated time: 1-2 hours Difficulty: Medium/Hard
Begin by removing the negative terminal of the battery to avoid damage to yourself and any electrical parts on the vehicle. It has to be the negative terminal to avoid any sparks. Loosen the nut and pull off the cable.
Remove the air filter by unscrewing it and pulling it out. You will need to remember to label any hoses and wires that you disconnect so that it’s easier to put them back when required. You may want to take notes for which part you were taking off and in which order.
Before removing any electrical wires, vacuum lines or fuel supply lines, label these parts and then disconnect. When pulling off the hoses, now is a good time to check if they are damaged, cracked or brittle, and would be a good time to change them. These connections will be either screwed on, clipped or bolted, remove accordingly.
Remove throttle cable and any other parts that are connected to the carburettor. Once all connections, wires and hoses are all removed, then you are ready to remove the carburettor.
There are four engine mounted bolts where the nuts need to be removed. Remove these with a socket set or similar tool, and remove the carburettor from the engine.
Cover the hole left by removing this part so that no contaminants get inside the engine.
Fitting the new carburettor
Time to prepare the new carburettor for installation. There may be a spacer plate to mount to the engine, with the carburettor sitting on top of that, if not the carburettor will fit straight to the engine. There will be one or two gaskets depending if there is a spacer plate or not.
Grease these gaskets and place the first gasket on top of the bolts, then the spacer plate then the next gasket. If you don’t have the spacer plate just the one gasket will go on. Now place the new carburettoron top of these, and tighten the four nuts.
Once the carburettor is in place you can connect all cables, electrical connections and hoses to the part. When you are happy that everything is connected properly and you haven’t left anything out, then you can start to put the other parts you removed back into the vehicle.
Re-connect the air filter, any other parts that were removed and re-connect the negative terminal on the battery. Now you can start the engine to check that everything is in good working order.