When two boats share the same hull type — in this case both the Weldcraft Marine 186 2010 and the Weldcraft Marine 21 Legacy 2009 are deep vee designs with aluminum construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department — Weldcraft Marine 186 2010 at 18,5 ft versus Weldcraft Marine 21 Legacy 2009 at 21,0 ft. Weight tells a clearer story for trailering families: the Weldcraft Marine 186 2010 tips the scales at 174 lbs — 143 lbs more than the Weldcraft Marine 21 Legacy 2009 at 31 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
The Weldcraft Marine 186 2010 carries a rated maximum of 200 hp. Engine data for the Weldcraft Marine 21 Legacy 2009 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Weldcraft Marine 21 Legacy 2009 carries 62 gallons versus 42 gallons in the Weldcraft Marine 186 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 6 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: The Weldcraft Marine 21 Legacy 2009 at 21,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Weldcraft Marine 186 2010 at 18,5 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.