The Key Largo 174 2009 vs Key Largo 186 2007 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department — Key Largo 174 2009 at 17,0 ft versus Key Largo 186 2007 at 18,0 ft. Weight tells a clearer story for trailering families: the Key Largo 174 2009 tips the scales at 1 375 lbs — 1 220 lbs more than the Key Largo 186 2007 at 155 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 power gap is worth calling out. Rated to 140 hp, the Key Largo 186 2007 has a 50-hp advantage over the Key Largo 174 2009's 90-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 35 gal and 35 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Key Largo 186 2007 is rated for 7 passengers, while the Key Largo 174 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Key Largo 186 2007 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Key Largo 186 2007 comes in at 1 lbs per hp versus 15 lbs per hp for the Key Largo 174 2009. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.
Bottom line: Choose the Key Largo 186 2007 if your priority is putting more people on the water — it handles 7 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Key Largo 174 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.