I have a JD 14SB hand mower. It does not get used much anymore. Between the weed eater and Round up. When the youngest grand sons got to coming over to play in the yard I remembered how we used to mulch the yard by hand right around where the kids would play. The very next day there would be almost zero clipping carried into the house by the kids.
So I got the mower out and had to clean the carburetor. I got it to run but it would die after a few minutes just like the float was stuck or a plugged fuel line. I had the carburetor off 3-4 times and removed the fuel tank and flushed it and replaced all of the fuel lines. It became a challenge to get it to run right. I finally just put it away two years ago with it not running right.
I got it out last spring and I tried it again. It was doing the same exact thing. My son had an issue at work with one and change the spark plug and it ran fine. I changed the spark plug and it ran perfect. The old plug is not black or even very dirty. You can put it back in and the mower will die under load.
This mower had a Kawasaki motor. Just a few months after that my Honda pressure washer started to do the same kind of thing. Run until hot and then die. I changed the spark plug and it ran fine.
All of these spark plugs where NGKs. I have had very good luck until these showed up. So they even have some issues too. So if I get a small engine that is dying after it is hot I try the spark plug first anymore.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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