The Green Disease

I've been looking for a 5 to 6 kilowatt 120/240 generator for a while now. You know, as a backup to the backup to the main generator. I finally found one that was close by and priced less than $200. Mind you, I wasn't looking for just any ol' run of the mill 5kw, but an Onan, and preferably the cast iron engine 1800 RPM CCK variety. Yes, I have the well-known and often diagnosed Onan green disease. As I've mentioned in the past, I have a 1950s Onan AJ 2500 watt 3600 RPM generator that my dad bought at a phone company auction back in the early 70's. Then in 2011 I picked up an Onan LK 2500 watt 1800 RPM generator out of a motorhome for thirty five bucks. Then in August 2019 the Onan CCK 3500 watt 1800 RPM generator fell into my lap free from Craigslist. All three of those are 120 volts only though, thus the desire to get a 120/240 unit. You know, as a backup....