Yes to all three questions.
1. hole in the boat for water cooling pickup.
2. seacock for shut off.
3. exhaust is out the side, but usually above the water line, so there is a odor.
4. gas line from your tank to the unit, and 12 electrical.
as you may know, the new honda's are invertor generator, which provide "clean power" to laptops and flat screens with to flux in mhz.....
plus, your honda is way quieter then the marine units.
If i need a generator, I still with a portable on the bow, as not to sink money into a depreciating boat.
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