Had had an autometer temp gauge laying around for a while and decided to put it on the 2305 today. I hate that Deere only installed an idiot light on this tractor. Think any previous water cooled tractor I've owned has always had a gauge. There's no good place to cut a hole in the dash or instrument cluster so I picked up a 2-1/8" cup to mount it in.
Pulled the hex plug next to the temp sensor, it's 3/8 NPT and the adapter was included with the gauge kit. Tried to plug the hole with my finger while I swapped fittings but it wasn't necessary, it didn't really even try to leak much of anything out. After I got all done and fired it up, I realized the hex plug is located in the return hose coming back from the radiator. I'll probably pick up the correct M16 adapter and move the sender over to the big plug on the other side. That one would be in the upper radiator hose. It's metric and the only place that was open today didn't have one. Gauge works fine, still gonna let me know if it's running warmer than usual, think I'd just rather read the coolant temp as it exits the engine.