David Lesher wrote:
Alas, neither cite fits the bill. One is a marine
water-to-water unit, it appears; the other URL is a
paper on engine heat. Neither is useful on a 2 cyl.
aircooled generator.


Original VW beetle heat exchangers maybe. I don't know the details from
having one, although I know some people that have, but they used exhaust
heat exchangers to heat the cabin air. IIRC the only problem was when
the heat exchangers became perforated and started passing exhaust into
the cabin air.