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  1. Repair Parts Home
  2. Repair Center
  3. Cultivator
  4. Engine Misfires

Cultivator Parts: Engine misfires

Check the valve, cylinder, ignition coil, and spark plug if the engine in your cultivator misfires. Follow our repair and symptom guide to help you identify the problem and the best way to fix it. If you need specific repair instructions related to your model, refer to the manual provided by the manufacturer.

Cultivator Parts: Engine misfires

Valves

Your cultivator's engine has two valves. The intake valve controls the flow of fuel and air into the cylinder during the combustion process, and the exhaust valve allows the remaining gases to exit through the exhaust port. Over the course of time, these valves can become clogged with residue, and this often leads to them malfunctioning. This can interrupt the combustion process, which leads to the engine sparking at the wrong intervals. As a result, your engine will misfire and you will likely need to adjust the valve timing. If one or both valves are clogged, you may be able to simply clean them, but if they are damaged, you might consider replacing them.
Cultivator Parts: Engine misfires

Spark Plugs

If you notice your engine is misfiring, it could be the result of a damaged or faulty spark plug. The spark plug is designed to ignite the compressed fuel mixture in the cylinder, which will start (and run) the engine. If the spark plug is damaged, or is soiled by residue to the point that it can't properly ignite the fuel, your engine may misfire. Before you inspect the spark plug for corrosion or wear, make sure to let the cultivator's engine cool for approximately 30 minutes. Often spark plugs can be cleaned to restore them to working order. However, if the spark plug is damaged our fouled so badly that cleaning does not solve the issue, you may need to replace the plug. Before you replace the plug, you should test the ignition coil to determine if it is the coil or the plug causing the misfire. However, if the spark plug is corroded, it should be replaced anyway.
Cultivator Parts: Engine misfires

Cylinders

Over the life of your cultivator, carbon deposits can build up inside the engine cylinder. These deposits are often concentrated at the exhaust port. If your cylinder's exhaust port is clogged, it can cause your engine to misfire. It is recommended that these carbon deposits are cleaned regularly. If not, you could end up with a damaged piston, piston ring, or cylinder. Damage to the piston and cylinder can end up being a costly repair, but proper maintenance can help prevent it.