How to Wire the Toro Proline Zero Turn

Park the Toro Zero-Turn mower, and cut the ignition if it has been able to run. Toubleshoot the engine only with the machine turned off.

Open the front hood over the Briggs & Stratton engine.

Check the left side of the motor for the spark plug, which can be seen about halfway up the engine. A thin black wire known as an ignition wire must be connected to the spark plug. That wire also resides along this side of the engine. Reinsert the wire into the spark plug if it has come loose by sliding it into the rear of the plug.

Locate the battery at the front of the engine assembly. It has two terminal wires extending from it. The red, positive wire comes out of the left side of the battery, and the black, negative wire extends from the right side. Follow the red wire all the way back to the rectangular, black solenoid piece. The solenoid has a bolt on each of its sides. The red terminal wire should connect over the bolt on the solenoid's left side. Loop the open end of the red terminal wire onto this bolt if the wire has become disconnected, and tighten it by twisting the bolt clockwise with a socket wrench.

Check the left side of the solenoid. A black wire extends from the starter motor down to this side of the solenoid, and that wire must be connected securely to the solenoid's left side bolt. Connect it to the bolt if it has come loose in the same manner used to connect the terminal wire. Tighten this wire onto the bolt by turning the bolt clockwise with your socket wrench.

Find the Toro engine's flywheel. The flywheel is easily recognizable because of its distinctive circular shape. It is secured and covered by an iron shroud. Gain access to the flywheel by removing the bolts from the shroud with your socket wrench. Pry the loose shroud off with your hands.

Check the right side of the Toro's now exposed flywheel. A flap that is part of the engine's governor is clearly visible here, sitting atop a bolt. The wire extending from the flap must be secured to this bolt. Reconnect the flap by looping the wire over the bolt and adjusting it with your socket wrench as you did with the terminal wire and starter motor wire.

Fit the iron shroud back over the flywheel, and reinsert its bolts with your wrench.