Grass gets tall and you decide to mow your lawn. Your lawnmower cranks and goes okay. You start mowing and 10 minutes later the engine stops and refuses to restart for 30 minutes. The questions are thinking about why it stopped, why it will not restart, what is wrong and how to fix it.
Systematic symptom control
If you systematically follow the symptom control here as step by step, it will help you quickly achieve a correct diagnosis so that you get the mower back in operation and reduce your level of frustration.
How did the engine stop? Was it sudden or was it a few seconds before you stopped. If it is stopped suddenly, it indicates that the ignition failed. Possibly from a coil that overheats and 30 minutes of waiting time causes it to cool down and resume work. If you have a spark tester, use it to determine if the engine has a spark.
If you do not have a spark tester, remove the spark plug and put the spark plug back into the socket. Place the plug on the surface of the motor where the base will be marked and cranked over the motor while thinking of the tip of the plug. Test for spark immediately after the engine has stopped and if the spark is not present when the engine is cranked, replacement of the ignition coil is repair in this case. Also check if one of your “rodent”
It is also worth double checking to make sure you are not dealing with a single block from too much grass.
If it splashed for a few seconds before stopping, it points to the fuel starvation. This can be caused by a plugged ventilation hole in the fuel cap because the gas used from the tank must be replaced with air entering through the ventilation hole. Immediately after the engine stops, open the gas caps and listen for air to be drawn into the tank. If the engine restarts, the problem is the valve in the gas cap.
Either clean the valve or replace the cover with a new one. Check the fuel hose between the tank and the carburetor to see if it collapses or is connected internally. Sometimes the float and / or the needle in the carburettor will get stuck and turn off the gas flow. Carburetor disassembly and float and needle replacement will be cures.
The fuel closed solenoid valve mounted in the bottom of the carburetor can also be a reason for the engine to shut down. This solenoid valve has a spring-loaded pintel on it which shuts off the fuel flow to the main carburetor jet when the engine is switched off. Intermittent electrical conductivity in the wiring that provides this solenoid valve and / or failure of the solenoid valve itself can shut off a motor.
Disconnect this cable cord connector and check for electrical voltage across the harness outputs with the key on when the engine is turned off. Absence of electrical voltage here indicates problems with the wiring. Check the wiring harness for pinched or worn conditions or poor corrosion at terminals and / or plugs. If you think it has electric power, reconnect it to the solenoid valve and listen for a clicking sound as you do so. This indicates that the solenoid is working.
In rare cases, the rubber tip on the solenoid valve comes loose and keeps the fuel shut off even if the solenoid is working. For a complete visual inspection of the solenoid fuel, remove it from the carburettor base and reconnect the wiring harness. Switch the button switch on and off and see the movement of the movement. It should retract with the key on and extend with the key off. If the solenoid valve does not respond, replace it.
Satisfaction with DIY
If you have followed these steps and discovered the problem with your mower and successfully repaired it, congratulate yourself for learning another set of DIY skills! Just think of the time and money saved from not taking your mower to the workshop and the long waiting time, while the grass gets taller, before it could be repaired and you could return it for service.