I’ve worked on that exactly north star generator. The tank needs to be removed to gain access to the carb. But once the snorkel kit (US Carburetion) is installed the tank can be put back in place and operated with either fuel.The only issue I have is with the LP/NG kit I found for this gen set requires fuel tank removal. I would like to have the option to run both with minimal effort to change between the 2 fuels. I didn't look too hard for a different kit, maybe there are other kits out there that are more user friendly.