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Almost no one knows the weight of 'just' their Montauk hull.

Most people have fuel, and fuel tanks, battery, Oil, and many other possible items in their boat.

Can you weigh just your console separately and then your RPS seat separately?
Add those to your hull weight and you will have the weight of your standard equipped Montauk.

The Standard configuration for a Montauk includes the RPS, Console, and Rails in the weight of 900 pounds.
Again, all Montauk will vary.

No boat will weigh the same as Phil points out above.
So knowing the weight of someone else's Montauk won't really help you that much.
The weight for the catalogs will give you a general idea.