I have the 37 on a Super Z and am having charging issues. The wire that connects to the regulator comes loose and obviously wont charge the battery. I'll get a new connector thats fine but the regulator has become discoloured where the charge wire is. Is that normal? A mechanic told me it shouldnt be like that. I put a Volt meter on it and the regulator was up at 25+/- V. While messing with the wire and recharging the battery after it went flat while mowing, I put my hand on the hydro oil tank and it was very hot. I could leave my hand on it but it was kinda like holding a hot cut of coffee to give you an idea. The hydro cooler fan is working and is cleaned off and out every day before use and blown off between jobs. Should the oil reservoir get that hot?