Maybe the type of use is also a factor......
Example.......if you fish and make a lot of repeated drifts, seems the " on /off" of the outboard better suited ? I'm not expert on diesels, but mostly they're started and only shut at end of day. Long runs.....the diesel.
Odor and fumes would likely be a bit more noticeable with the diesel.
Those 4 stroke 250 Yami's are so quiet, on friends boat we sometimes forget they're on.
As the guys who know these boats also report - ride with the diesel, inboard gasers, and then I/0's probably the best.
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