Can I Spray Starting Fluid in the Spark Plug Hole

Is It Safe to Use Starting Fluid in a Spark Plug Hole? ✅ Yes, you can spray starting fluid into the spark plug hole, but it should only be used as a last resort for troubleshooting a no-start condition. Starting fluid (ether-based) is highly flammable and evaporates quickly, helping the engine ignite if it’s not…