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throtle setting not high enough, bad spark plug,

Something else to check

Newer mowers come with a safety interlock system that prevents mower engagement when no operator is on the seat or when the parking brake is engaged. Check your seat switch by junping across the terminals, if the blades start then the seat switch is bad.

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16y ago
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14y ago

Look underneath the deck where the pto is. There are two wires coming from it. Make sure they haven't disconnected, check that those wires are in good condition also. And if all that seems good it may be your switch.

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Q: Why does your riding mower stall when you engage the mower blade?
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