Well my tractor won't reach operating temperature so I figured that it's probably a good idea to replace the thermostat. Cheap easy fix right? Wrong! I got on steiner tractor and ordered the thermostat. $12.50 says its fits 620, 630, 70, 720, 730 diesel. Well since they didn't make a diesel 620/630 I thought hmm must fit 720/730 gas too. Boy was I wrong. I had my dad's 2" thick John Deere 730 parts manual and sure enough it says I ordered the right part. The one they sent me looks like a regular old thermostat 1.5" long and 2.5" around. The one I end up pulling out of the tractor is like 4" long and 2.75" around. Well come to find out that $12 thermostat fits basically every tractor but mine. So I go online and look up John Deere parts manual. This time for a gas 730. Well it's a different part number. I looked this up. Steiner tractor doesn't even have it. The only place I can find it is for $200!! for a thermostat?!?! Please someone tell me they know where I can get one cheaper than this? AF1710R