If you trailer without shutting the gas off, and your needles and seats in the carb are marginal or failing, you can fill the crankcase with raw fuel. When you try to start the engine, the fuel ends up in the top of the cylinder and you will have a hydrolock and wonder why it won't turn over. Then you pull the plugs to see what's going on, give the rope a yank, and fuel spouts out the spark plug holes all over the place. Great. This is what you need. Fuel, oxygen, and an ignition source. I was lucky, (no fire) but I also learn from my experiences; I ALWAYS have shut the gas off when I trailer.
I had never had a problem before that; just takes one time. And when I took the carbs apart to check the needles and seats to the float, they appeared fine.
2007 RMK 700, 2008 RMK 600, 1995 AC Prowler 2-up, 1980? AC Cheetah