Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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How old is the battery in your mower?
I am lead to believe that although your battery reading shows 12 volts, your voltage could be dropping too low during starting up. This is likely the reason for the clicking and buzzing sounds.
Thanks for your reply. Do you have a multimeter?
We need to determine what your voltage readings are, as you are attempting to start your engine. Your voltage could be dropping too low during start up.
Thank you for checking. I would get your battery tested, or fully charged.
Remove your spark plugs, then check to see if your engine spins freely. How low does your voltage drop?
3 volts is much too low. Although your battery is new, I believe it is at fault.
If your engine will spin if you bypass your solenoid, but your voltage drops to 3 volts if you turn your key, there has to be a bad or loose connection somewhere. With your key in start position, check your voltage on both of your solenoid post, to see if the reading is the same. Let's see if the input and output readings are the same.