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To change the spark plug on a Kohler engine, follow these steps:
1. Locate the spark plug: It is typically located on the side of the engine, near the cylinder head.
2. Disconnect the spark plug wire: Gently pull the wire off the spark plug. Be careful not to damage the wire or the plug.
3. Remove the old spark plug: Use a spark plug socket and ratchet to loosen and remove the old plug from the cylinder head.
4. Inspect the new spark plug: Check the gap between the center and ground electrode. Adjust if needed.
5. Install the new spark plug: Carefully thread the new plug into the cylinder head by hand, then tighten it with the spark plug socket and ratchet.
6. Reconnect the spark plug wire: Push the wire onto the new spark plug until it clicks into place.
7. Start the engine: Test the new spark plug by starting the engine and ensuring it runs smoothly.
Remember to consult the engine’s manual for specific instructions and recommendations.
The spark plug is responsible for igniting the fuel in your Kohler-powered equipment. However, with the engine running, carbon buildup occurs around the spark plug, resulting in decreased performance. Moreover, the spark plug wears out as the engine continues to run. When the spark plug is worn out, complete combustion does not occur, and fuel gets expelled through the exhaust system, causing a black smoke cloud. Therefore, changing your spark plug, whether it is a Kohler 7000 series spark plug or not, is essential to keep your equipment running smoothly.
Replacing a Kohler 25 HP Engine Spark Plug
Begin by cleaning the area around the spark plug with a can of compressed air. This will prevent any debris from entering the engine when you remove the spark plug.
Next, remove the spark plug wire from the end of the spark plug. You might need to pull hard to release the inner clamp of the spark plug wire from the contact of the spark plug.
Attach the spark plug socket to the 3/8-inch drive ratchet handle, set the direction of the ratchet handle to reverse, and remove the spark plug from the engine.
Cleaning and Inspecting the Spark Plug
Use a soft wire brush to clean the threaded end of the spark plug and remove any carbon buildup. Also, inspect the end of the spark plug for any signs of wear. If you notice cracks in the ceramic located above the threads or a melted contact, replace the spark plug.
Adjusting the Spark Plug Gap
Adjust the gap of the spark plug to the gap specified in your Kohler 25 HP engine operating manual using the spark plug feeler or wire gauge. To adjust the spark plug gap, slide the correct-width tap on the spark plug feeler gauge between the gap of the spark plug and the grounding electrode. The grounding electrode is the thin metal arm located at the bottom of the spark plug.
Thread the spark plug back into the engine by turning it clockwise by hand.
Attach the spark plug socket to the 3/8-inch drive torque wrench and set the torque wrench to the torque specified in the engine operation manual, which is typically between 18 and 22 foot-lb. of torque.
Finally, push the end of the plug wire back onto the spark plug once the spark plug is set to the proper torque.