I recently purchased a 2002 Carver 570 Voyager. It has a Kohler 15.5 EOZ generator. When the boat was surveyed the surveyor noted the voltage needle to have some irregularity when it starts up, with voltage fluctuating between 220 and 280 V. The engine sounds quite regular during this time, and once the generator realizes its load it settles out at a constant voltage (takes less than a minute). The surveyor recommended having a generator specialist evaluate, which we did and they recommended some work including replacing belts and diodes on voltage regulator. $4000 later it still does same thing, and they now think it is insulation on the windings, which would be very expensive to deal with. The seller of the boat then sent out his own mechanic to evaluate (not sure of his true qualifications). His mechanic evaluated and replaced impeller and stated generator is working fine. He said voltage fluctuation is normal when generator is seeking out its load. i had another Kohler certified generator service evaluate after that to verify, but they said this degree of voltage fluctuation is beyond what would normally be expected. The sellers mechanic also mentioned that trusting the voltage needle that is on the panel may not be possible as it is a low quality indicator. Looking for advice/opinions on where to go from here. Money was escrowed upon closing to deal with things like this, but seller believes generator needs no more work since his mechanic stated it is fine. I have video showing the voltage needle during this period that I am happy to share with anybody that wants to see if. My dilemma is that I have had two separate Kohler certified service technicians say there is a problem, and one mechanic send by seller (who did seem quite knowledgable, but of unknown qualification) who says it is fine. I very badly want it to be fine so we can move on, but I believe it may not be. Relationship between me and seller/broker has unfortunately become a bit contentious. Any advice here would be greatly appreciated.