The only thing that would happen is the clogging of the fuel pickup and or/fuel filter/pump. This is assuming you can keep the chocolate melted. If you are using a syrup, everything above still stands as correct... bigger question is... why the hekk would you want to?
Don't know. Just don't do it
Nothing.
By heating chocolate is melted; after this chocolate is thermally decomposed. Chocolate gas doesn't exist.
pancake sryup is my gas tank, what do i do?
the tank will leak
What happens when chicken bone gets stuck in gas tank
You will likely need to drain the gas tank.
remove the fuel tank and drain the water
Nothing
any kind of chocolate smell makes me gag, so i got to say it smells like a stunk put gas on it a 1,000,000,000 times
You'll have infinite gas and live forever.
NOTHING