If you recall, I had a Detroit Diesel 3-53 in my trailer.
After I cleaned up my yard a little bit, I dragged it out, so it sits on a cart (properly tied down).
I tried starting it again. Just as in winter, it started VERY strong and fast. It also would not respond much to the controls.
To stop it, I covered the air intake with a wooden board.
The first time, it stopped.
Then I opened the valve cover to see if controls move anything under the valve cover. One kind of did move something.
Then I started it again a second time. (with the valve cover off a mistake).
The second time, believe it or not, it did NOT stop. It kept going, slowly, but it just would NOT stop. I pulled the fuel line, and finally, after a minute, it did stop.
My question is WTF? How exactly can it run, with the air intake closed? The board seems soft and smooth, and it is not likely (but I am open to anything) that it let any air into the engine.
Since it was outside the trailer, unlike in winter, I was not in danger of ruining my underwear, but it was freaky and unsettling to have an unstoppable diesel engine.i