Check the bleed and oil lines as they deteriorate. The fuel line will not be ethanol resistant and you might also check the lower end unit, replace the water pump of course and that would be about it. Check the drain tube for corrosion as the battery gasses in the bilge from charging will pepper those out. Also the circuit breakers are probably needing a replacement, though we would pick up a back up in case as the older ones seemingly were more dependable than those of today. The trailer we assume you are in tune with and have kept an eye on the bearing temps and brakes. BCB
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