How to Fix a Fouled Spark Plug
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- เผยแพร่เมื่อ 29 ส.ค. 2024
- A fouled spark plug can completely ruin your flying day! If you’re unable to get it cleared by completing the engine ground run procedure in the aircraft POH, you’re going to have to swap or clean the fouled plug.
To do this you will need some tools, some knowledge and some confidence. This video will look at how to diagnose which cylinder the fouled plug is located in and how to removed and install a spark plug. You will need a 7/8 deep 3/8 drive socket, extension, ratchet, 7/16 wrench, 3/4 wrench, 7/8 wrench, and a screw driver.
Hopefully you have watched our video on what tools to carry and then you will have everything you need to fix a fouled plug.
I hope this is helpful and if you have the opportunity to go over changing a spark plug and removing and installing your cowls with your mechanic it would be very beneficial.
Great video
Glad you liked it Henry!
“Canadain”? LOL. At any rate, great video!
Yes I apologize. I make mistakes now and again.
I had a badly fouled plug causing a misfire when I was on the right mag. CHT was about 20° lower than the other three cylinders but EGT was normal. When I pulled the plug, it sounded like a teaspoon of sand came out of the port. How do I be sure that there is no other debris from the fouling is left behind in the cylinder? Can I blow it out with my compressor? will it burn up? I don't want to have any damage running it if there is still debris inside.
I see this problem a lot on aircraft especially if the mixture is not leaned during ground and flight operations.
Some compressed air at one spark plug hole combined with a shop vac at the other shop get the majority of loose items.
If you have access to a bore scope and can look inside the cylinder you will be amazed at the amount of deposits inside the cylinder.
If you engine is eligible to run on MOGAS cutting your AVGAS 50/50 with MOGAS will also half the amount of lead in going into the engine, reduce some operating costs, and still give you the high quality and stability of AVGAS.
It is very important if you consider this to ensure that MOGAS is compatible with your airframe and engine and that you ensure there is no ethanol in the MOGAS that you are using.