Cleaning the carburetor is basically a must when acquiring a lawn mower. Lawn mowers are exposed to a large amount o debris when cutting the grass and if fuel has sat in them for extreme periods of time, both will cause operation issues with the engine. This can include hard starts, erratic idling, no start, poor performance, and poor fuel consumption.
Tools/Supplies Needed:
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- pliers
- fuel line
- hose cutter
- ratchet and socket set
- safety glasses
- rubber gloves
- pan
- rags
- container
- carburetor cleaner
- replacement gaskets
- new air filter
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Start by removing the air filter cover which is held on with a bolt on the top side. Remove this bolt and then unclip the cover on the bottom side. Remove the air filter and then 3 bolts behind the air filter. Finally remove this plastic cap which covers the carburetor, there will be a hose in behind that connects to this plastic case. Disconnect the fuel lines by removing the pinch clamps first using plies. Use the pliers to gently twist the lines as they can stick when they haven’t been removed for a longer period of time. Remove the two bolts holding the carburetor to the block. These can be a little harder to gain access to due to the tighter space so take your time not to strip the heads. Keep a rag or container handy in case some fuel spills out, you can also pinch the line using locking pliers or a clamp or use something to plug the fuel line such as a bolt. Remove the fuel line, then pull the carburetor back from the engine block. Disconnect the throttle control linkage, finally the carburetor is removed and we can begin disassembly for cleaning now. There might be fuel still inside so again have a rag or container handy. Remove the float bowl bolt and the plastic float bowl is removed by taking out the pin. Above the float bowl is the needle. This particular model of carburetor does not have a high and low speed jet as they are fixed settings from factory, therefore if the carburetor is too far damaged, a new unit will need to be purchased. Using a carburetor specific cleaner, clean the unit. Clean the carburetor in a pan to prevent any overspray on other objects and use a soft wire or fishing line to help clean out any of those orifices. Clean the float and float bowl and then clean the passage in the float bowl nut. Allow the cleaner to evaporate and then reassemble. Reassembly is in reverse of disassembly, inspect any gaskets and replace accordingly. For the fuel line replacement, if your tank is full, you will need to empty the fuel. As you can see this line is deteriorated and if it was leaking now, will be leaking very soon eventually. Use a fuel compatible hose only as this will withstand the damage caused by fuel . The new hose should fit tightly around the fitting and ensure the clamp will also keep pressure on the hose connection. Match the length and cut the new hose accordingly. Side cutters can be used, but I am using a specific hose cutter instead which allows for a clean and straight cut. Transfer the old hose clamps to the new hose, install the new fuel line. Finally install the carburetor in reverse of removal.
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