Hello my name is Rob, and I am a new member. I live in the United States. I recently bought a Petter 3hp appletop engine. The engine was restored several years ago. It is in nice shape and runs well. The base fuel tank is rusted on the inside. I want to remove the tank to clean it out. I assume that I need to remove the copper fuel lines. Then remove the four nuts from the studs on the fuel tank. I will lift the engine to separate it from the tank. After I remove all the rust, I will coat the inside to prevent it from rusting in the future. When I reassemble the engine is there any type of gasket that goes between the engine and the fuel tank? Thanks for any information.