Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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What is the part number of the switch purchased for replacement? Sounds like the switch is the wrong one if it started before with switch, but is not starting now
Main thing to look for is that all the letters on the poles match on both as this is what makes everything work properly. That is the correct part numberfor your model machine. Can you jump the solenoid and start it? Can you shut it off with the key switch if so?
okay, let me know and we can troubleshoot from there
Okay, I would clean the harness plug very well and retry. If still no good, check the PTO and everything else on mower to make sure what will work and what will not work. Once you jump mower off by solenoid, can you engage blades, move machine forward and reverse? It is most likely an issue with a loose ground wire somewhere, but wiring issues can be tricky to track down, so will possibly need to take many steps to find the issue.
Check that the ground wire is connected properly from the ignition switch as if it will not shut down the engine, it is normally due to a bad ground wire