It didn't come with a motor. I'm trying to decide what to put in it. I thought about one of those 6.5 hp clone engines. I can get one of those for $99 and they are easy to get more power out of. There is also a 13 hp honda available locally for a reasonable price but i don't know how well it would fit in this thing. It is quite a bit smaller then my 12. There are also some 5 hp briggs available locally for cheap but I don't know if that will be enough power.
sounds like a plan I have to get started on my 7 got my Dads 12 running the other day after a 30 year rest......now to get my 7 running Im considering a 900 series Briggs for mine may need to cut a small square out of the grill for that if I can't get the original 7 going
Look for Tecumseh Formula engines on Ebay. They are nearly identical to the engine that came in your tractor and would not require much work to make them fit. Somewhere on here I have a thread about putting one in my MF-8.