86 marathon no fuel

[van the man]

Hey yall my daughter and her friends killed my cart again. From what i understand it backfired a few.times and died. My neighbor towed me home with his 95 4 stroke (******) and i got to looking. Plug sparks, piston goes up and down, so starter and spark okay, piston okay. No response to starter fluid. Pulled gas line from pump, intermittent drizzle of fuel. Im thinking pump. I took it off and apart, everything looks normal, but not much to see. Im also thinking vaccum maybe? Rear crankseal looks okay. any ideas? Thanks