Spark Plug Reinvention A Guide to Diagnosing and Replacing Faulty Plugs

Re: Fouled spark plugs ... Too often, people fret over the appearance of plugs. Don't worry about your plugs as long as the engine performs well. One thing that fouls plugs quickly is driving short trips without ever allowing engine to reach full operating temps. A fouled plug causes a misfire. You'd be running on 5 cylinders if you had a fouled plug. If you have fouled plugs, or just one fouled plug, you ... Generally speaking if you depart with a fouled plug and it is causing a rough running issue you should cycle the magnetos untill you are running ... Spark plug fouling is essentially a spark plug becoming too worn, dirty or contaminated to work. Make sure you check the spacing on your plugs in addition to checking to make sure they're not covered in oil or dirty in general. This rule ... He noticed spark plug #1 was fouled & swapped from #1 to #4 cylinder and it triggered it there too, so decided to change all of the spark plugs. Clean those plugs. I switched to the REM or UREM37BY plugs for every engine we had that was approved to use them, and that stopped the fouling ... A fouled spark plug may be an early sign that a head gasket is starting to leak. The cheap fix here wold be to add a bottle of cooling system sealer or head ... A fouled spark plug can lead to misfires, reduced performance, decreased fuel efficiency, and potential engine damage.