OK, I went out to take the video today of the smoke. Started the gen up and started video, no smoke or sheen at all. Then loaded gen with 4 ACs and still no smoke. Then I let it run for 45 minutes with load up to good operating temp and still no smoke. All is well, I guess I was seeing things. Here is some background of what I did before this.
I changed oil, and flushed coolant, replaced a defective hose from coolant pump to heat exchanger, cleaned heat exchanger with rod through tubes, some clogged a little. Finally replaced zinc and gasket. Now engine running cooler. I did run the gen a number of times through this work with little to no load to check items as I went through the work. ( this might explain some sheen because of not running gen with load for short durations)
After the above work I noticed the smoke after we had been anchored and gen ran all night with little load. 2 ACs on but did not run much after initial cool down of cabin. Cool damp morning. Could it have been a result of warm exhaust water hitting the cooler sea water??? Note it was not very much smoke to start with....
I guess I will monitor and hope I don't see it again.