^ thats another reason why your air intake, air box.. needs to be intact, in place and secure.
if you run a carb with no intake airbox or air filter, if the engine backfires it blows flames out of the carb intake. Usually the next stroke will suck the flames back into the cylinder and put it out, but if you have a gas leak in the area around the carbs it will catch.
another thing that can cause an engine fire is oil leaking onto the hot exhaust manifolds - doubt that is the case here.
One of the car fires I put out was a neighbor when I was in college. The kid had his mustang in the parking lot, took the carb off the engine to have it rebuilt, then tried to start the car up with no carb to pull the car back in his garage. I dont know what he was thinking but WOOOOOF! Fuel pump was spraying gas all over the engine when he cranked it.
Maybe he had the fuel line pushed in the intake manifold and thought that would give the engine enough gas to start it up?! I did not ask.
Last edited by KCW; 11-02-2018 at 10:26 AM.