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How do I replace an Engine Flywheel Key in a Riding Mowers & Tractor?

If the seat switch doesn't detect you in the seat, the engine will die. If you plug the wire harness, the seat switch will stop the engine. Make sure the seat switch wire harness is plugged in when the engine dies. If you find the seat switch plugged in, you should replace it.

If the steering is loose on your lawn tractor or riding mower, you should replace the front axle.

If you notice an oil leak in your mower's engine, it could be that the engine has blown the head gasket. The top of the engine has a cylinder head. A loss of power is caused by air leaking past a damaged head gasket. There is a gasket that doesn't seal the cylinder head mounting surfaces. The head gasket needs to be replaced if it leaks.

The grass is cut by the blade belt. Your mower won't cut the grass if the drive belt isn't working. A worn blade belt can cause other problems. If the blade belt is worn or broken, you should replace it.

The riding mower or lawn tractor has a fuel pump that moves fuel to the engine from the fuel tank. The fuel pump might not work if the engine won't start or stop. The fuel pump is cracked. The fuel pump should be replaced if it leaks or doesn't pump fuel.

The tie rod needs to be removed and replaced. The tie rod may need to be replaced if the steering is loose or the wheels don't turn.

When you shift the blade clutch lever to the engaged position, the blade clutch cable tightens the blade belt to spin the cutting blades. If the blade clutch cable is broken or worn, the blades won't spin. When the blades won't turn, look at the cable. If you find the blade clutch cable broken, replace it.

When you tighten the flywheel nut, there is a small metal rectangle that keeps the crankshaft and flywheel aligned. If the mower blade hits an object like a rock or a tree stump hard enough to cause the flywheel to slip out of alignment with the crankshaft, the flywheel key is designed to shear to protect more expensive components from damage. The engine can run rough if the flywheel Shears slightly. Your riding mower engine will not start if the key breaks or shears. The shears should be replaced if the key breaks.

Follow these steps to fix your issue:

  1. Disconnect the battery

    Set the parking brake when you park the tractor on a level surface. The key can be removed if the switch is turned off. Gloves are used to protect hands. Lift the chair. Tuck the negative cable away from the battery so it doesn't touch the battery post if you remove the bolt connecting it to the battery.

  2. Remove the seat

    The seat bottom contains a retaining bolt and washer. To slide the seat forward, press the seat adjustment lever. Pull the seat off of the seat adjustment lever by releasing the locking tab. The seat adjustment lever can be removed.

  3. Remove the old seat switch

    Remove the wire harness from the seat switch. Pull the seat switch from the seat by rotating it clockwise.

  4. Install the new seat switch

    The seat switch needs to be pushed into the seat bottom to lock it. The wire harness needs to be connected to the switch.

  5. Reinstall the seat

    While you snap the seat back into the brackets, support the adjustment lever with your hands. The retaining bolt and washer need to be removed.

  6. Reconnect the battery

    The negative cable should be connected to the negative battery terminal. The seat should be lowered.

Time required:

15 minutes.

You would need the following tools:

slot screwdriver, work gloves, wrench set.

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