Question about Craftsman 21 HP 42 in. Zero Turn Tractor Mower - CA Model

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Craftsman zero turn model# 107.27774

Ran fine yesterday today it wont start when you turn the key it clicks 12 volts on the yellow (solenoid )wire when you turn the key but when you jump the solenid it will crank but the blades will not engage. safty switch keeping it from starting and blades engaging? thanks

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If you are jumping the solenoid and it cranks but wont start leave the key in the on position and give it a try. Try replacing the solenoid and the wires conecting it to the battery.

Posted on Apr 24, 2009


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The IGNITION KEY SWITCH is connected by a small wire to the terminal in the GREEN circle on the SOLENOID. The battery is connected by a thick, heavy cable to the terminal in the RED circle of the SOLENOID. The terminal in the YELLOW circle of the SOLENOID is connected to a thick, heavy cable that goes directly into the STARTER MOTOR.

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When the key is held in the START position, +12 volts from the battery is passed through the IGNITION SWITCH to the GREEN terminal on the SOLENOID. This causes the SOLENOID to (1) become energized, (2) internally physically connects the +12 volts RED terminal to the YELLOW terminal and (3) physically engages the STARTER to the engine's flywheel. When this happens, the +12 volts from the battery appears on the YELLOW terminal; and directly into the STARTER MOTOR. The STARTER MOTOR spins. Since it is engaging the flywheel, the flywheel turns too and the engine attempts to start. Once the engine is running, the key is released. The SOLENOID (1) becomes de-energized (2) opens the physical connection between the RED and YELLOW terminals, (3) disengages the STARTER MOTOR from the flywheel and the STARTER MOTOR stops spinning.

I hope this helps!

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