I've never had to fill the reservoir, one morning last week the temp. had got down to 27* and I wanted to find out how the tractor would start cold not being started in several days? It did as always, turn the switch to on position for approx 10 sec. it then started up right away as usual, I've not owned but 2 tractors and this one definitely starts up quicker than the first one I had owned, the Old Kubota had the kind of switch you turn back and hold for about 10 sec. to heat the Glow plug it would always need 2 -3 tries before ever starting, actually I would run the battery dead some times while trying to start it in cold weather, one time I tried the Ol- starting fluid trick and would start it right away. was better than going for the battery charger each time .. Note:... but the use of starting fluid is a Bad idea, it became addicted to having to use it and 50% of the time I would need it to crank the old boy, I never would use this again on any other tractor, I was lucky not to have blown the piston out of the engine, I think back because of this tractor being low in compression and only being a 1 cylinder must have help it to survive this stuff,
I've I only had my Yanmar since July and not really had the opportunity to do much with it, But from what use I have had,it is a mighty little tractor,