Thank you Paul and Matt, the deck does move freely, it was my first suspicion. I didn't check the pulley's on the mule drive though. I was hoping the cause of overheating was related to the fact I was running 10w 30 in it (or I should say adding to it, as im not sure what the previous owner used), Got a gallon of 30 weight and going to change the oil. The only thing I have done to it was replace the idler pulley on the mower deck this year as it seized on me end of last season.
I'm Set to dedicate some time to pulling the engine a part a bit today so Ill get her cleaned up and see what I can find, hopefully the head gasket isn't blown. I know the whole tractor is pretty dirty so a good cleaning won't hurt.
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