In the words of the great Nigel Powers - "There are only two things I can't stand in this world. People who are intolerant of other people's cultures... and the Dutch."
I'm just sayin' - hope you can take a joke 70CB750.
My shop story is really my dad's. Dad was the best guy you'd ever meet, but attacked motor problems with a big hammer first, tried to figure them out later.
His late 60's black Chevy stepside pickup stopped on the road just after fueling it up. He could not get it to so much as cough, so he went to the junkyard and bought a used six banger and swapped it in. Same story, would not fire. He then took the engine back to the yard and got
another one - swapped that in too.
It STILL wouldn't run. I was home from school and thought I'd check the "fuel-spark-air" status. I climbed into the engine bay and pulled the fuel line and had him crank it over. Fuel splashed out, but it smelled funny.... kind of like diesel fuel.....
Dad had pulled up to the wrong pump and flled it up with diesel. We drained the tank, got one of the engines running, and never spoke of it again.
Probably ten years later, I pulled a similar stunt. I had a mid 80's Buick LeSabre with a 5.7 liter diesel - a particularly bad GM product. I was fueling it while running, you didn't want to use the starter any more than you had to. I put in about 10 gallons of fuel and it quit. It NEVER quit, but I finished filling it up and sat in it to start it back up. Cranked and cranked but wouldn't start. Then I got out of the car, went to the fuel filler cap, turned around and reached out and my hand fell on the "premium" pump handle.
I had filled my diesel with gas. The apple fell real close to that tree. I ended up cranking all of that fuel out of the fuel line and into a couple of waste baskets right at the gas station. Refilled with diesel and off I went.