We may not always be models of quiet and decorum, but it absolutely astounds me the number of people who think that right before sunrise and right after sunset are perfect times to run their generators. So I'd like to offer this rule of thumb for those who might be confused: If you look around the harbor and see that it is calm and peaceful and that a number of people are out enjoying the beginning or end of the day with a beverage and maybe a friend, that may not be the best time to run your @#$% generator!
We have a neighbor right now who for the last two days has fired up his very loud generator at around 7am and 7pm. This morning I hopped in the dinghy to figure out who it was (I was leaving for work anyway) and found the culprit four boats away. I thought for sure it would be an open frame gas generator being used under the cover of darkness. To my surprise it was an inboard diesel generator. But there was very little water in his exhaust, and there was a thin stream of water shooting out from higher up on the hull.
This probably means that the water jacket on his exhaust elbow is clogged. The stream of water is probably from a vent line to an anti-siphon loop in the raw water supply. The water is supposed to mix with the exhaust gases to cool them and muffle the exhaust, but with the jacket clogged it has nowhere else to go. In the meantime, his exhaust hoses are probably delaminating from the uncooled exhaust, and the engine is probably running very hot due to the restricted water flow. If the generator is overheating, that may be why he runs it twice a day.
I now feel much more sympathetic toward this guy. His generator shouldn't be that loud. He probably doesn't know his exhaust is dry and he's pissing off half of the harbor. I still maintain that it's better to run your generator during the day, but I suspect he's going to find out about his problem a whole lot faster this way.