I have had to buy a new burn room for my engine and now it is leaking petrol out of the side

alright whats a burn room?

crank case? Duh

you kidding right? its the combustion chamber

He's only changed the button on an SX-21 engine. I think he's trapped dirt in there. So as I write this he should be stripping it down again.

burn room = combustion chamber
I'll have to add that to my U.K. to U.S. translation dictionary

LOL!!! Burn Room? Kinda Like a Boiler Room?