Probably a CJ7Y or equivalent.That is an older machine.

I have an old Green Machine and after they went out of business, my fuel tank developed a leak. No one had parts for this machine so I went to a local repair shop and asked if they could repair it or if they had an old used one that I could buy.

The parts man walked behind the counter and cam out with a new one. He said that "Red Hat" had bought rights to the machine and their tanks were identical. It fit perfectly and is still running after all these years.

Maybe the engine will be one that also uses the same or similar parts. It might be worth a little research

You could lso take your old part to a dealer and ask for a replacement. They should be able to match it. My machine is a model #3000 which has a different motor.