Palomino wrote:Q1: what is [included in the weight that is listed in the Reference section for an OUTRAGE 18 as 1,250-lbs]?
The weights given in all the REFERENCE section articles on Boston Whaler boats of various lengths and models are taken from the listings in Boston Whaler printed literature, typically their annual catalogues, usually on the back page.
For classic-era Boston Whaler boats that were not sold from the factory bundled with an engine already installed, the catalogue hull weight includes the components of a base model hull. For an OUTRAGE 18 that would typically be a hull with a center console, with seats, with hatches, and--of course--with an aluminum internal fuel tank, but not with any gasoline in the tank.
You can roughly estimate that a boat ready to go into the water and be used will weigh almost double the "hull weight" due to adding an engine, adding gasoline and oil, adding gear like anchors, lines, and fenders, adding canvas, and other miscellaneous items.
The best way to deduce the hull weight on a particular boat is to take off all the gear you have added that can be easily removed, then take the boat on a trailer to a certified scale, and get a weight for the boat and trailer. Then get the boat off the trailer, and return to the same scale and get a weight for just the trailer.
You also can often find the trailer manufacturer's label which will give the total trailer weight, which you could use as long as you have not added any weight to the trailer, like a spare tire holder and spare tire, added guides, keel rollers, bunks, and so on.
Then you will have the boat weight off the trailer but with the engine and all the stuff you left on the boat. From that figure you can start to subtract the weight of the engine and all the stuff on the boat then it was weighed, including any fuel or oil in the tanks.
At the end you might get a number that starts to get close to the catalogue weight, but probably not quite as light as the listed weight.