Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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Can you get the model numbers from under your mower seat for me? I would like to pull up a wiring schematic.
Thanks. Can you give me a minute or two, to pull up a diagram of your mower?
Thank you for waiting. How old is your battery.
Thanks for this information. Are you familiar with using a screwdriver to jump across your solenoid post?
Yes, try this and let me know if you get the same results.
Thank you for checking. We need to determine if you have a bad ground. Do you have some jumper cables?
Use your black cable to go from the negative post on your battery, to a good location on your engine, then try starting your engine again.
This leads me to believe that your new battery is at fault. Battery voltage should never drop below 8.5 volts during start up. Dropping to 6 volts is much too low of a drop. Do you have another mower with a battery?
Is your engine a Briggs and Stratton OHV engine?
If so, I would like for you to try something for me.
Remove your spark plug from your engine, then turn your key to start position. Let's see if your engine spins faster.
Have you check a your connections for tightness and cleanliness?
Both plugs. The wire getting hot, could be caused by a bad ground cable, or wire.
Is your engine a Flat Head or OHV?
I believe that your best solution will be to remove your large black cable from your frame, and use a wire brush or sandpaper to clean your surface really good, to ensure a good ground. Clean your cable with a flat file.
If your mower is an older mower, you likely have a flat head engine. If your engine have overhead valves, your valve covers would have OHV stamped into them.
If you have some jumper cables, you can go directly from a vehicle battery, to your starter. Do not start the engine on your vehicle, when doing this.
If your engine spin faster without your spark plugs inserted, this could mean that either your starter, your battery, or a bad connection could be at fault.
This also tells me that a belt or other attachment is not restricting your engine rotation.
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Take your time, and get all of your connections really clean, especially your ground connections.