Found a much bigger selection of belts online than local parts stores have. I think I have it narrowed down to 1-2 different sizes, both of which are in between the existing too loose and the other too tight I tried. Current belt is 960mm. Available lengths that might work are 940, 950, 953mm. I think the parts store belts were available in 1/2” increments(947mm) but it’s been years. Might be the too tight one was a full inch smaller(935mm). I’m going to try the 950mm.
Put some water in the tractor and it started leaking out of the block heater again. I must have knocked some silicone off. I drained it, started it to warm it up to dry it off and then smeared some up under the flange. May hold, may not. Gonna put some water in it here shortly but not cap it and not start it, see if it holds with no pressure. Needs 24 hours to cure for any pressure.
If worse comes to worse, pull it out and make a nice bead of silicone around the inside of the flange and let it dry for a couple of hours so I can handle it. Most silicone was once branded as Make-A-Gasket.
Meanwhile, I’m going to start some lettuce and cabbage family seeds as I work out the block heater. Peas too I suppose.
I’ll be buying pipe and wire rope aka cable for the tunnel bracing next week and probably some lumber for the tunnel shed.
I did clean out the actual shed yesterday. Not a detailed cleanup but got all my floor space back at least.