I have been in works with Marsh Mellow Exhaust on a 23 hp exhaust and he has helped a ton with getting me the product and having directions on what and how it needs to go together. I have a guy that is going to TIG weld the exhaust for me i was just curious if i need to take any precautions with my motor before i weld the exhaust while its bolted to my engine. What effects could it have on my engine? I have to fit it from the flanges out to get the correct fit so i want to make sure i dont fry my engine or wiring harness.

Thanks! I just didnt want to smoke the wiring or something.

Use ER316 or ER347 filler metal when you weld it.