The Blazer Boats Bay 2170 2005 vs Blazer Boats Bay 2420 2005 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 — Blazer Boats Bay 2170 2005 at 21,0 ft versus Blazer Boats Bay 2420 2005 at 24,0 ft. Weight tells a clearer story for trailering families: the Blazer Boats Bay 2170 2005 tips the scales at 1 359 lbs — 1 341 lbs more than the Blazer Boats Bay 2420 2005 at 18 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 300 hp, the Blazer Boats Bay 2420 2005 has a 100-hp advantage over the Blazer Boats Bay 2170 2005's 200-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 5 gal and 8 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Blazer Boats Bay 2170 2005 is rated for 8 passengers, while the Blazer Boats Bay 2420 2005 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Blazer Boats Bay 2170 2005 could be the deciding factor.
Bottom line: Choose the Blazer Boats Bay 2170 2005 if your priority is putting more people on the water — it handles 8 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Blazer Boats Bay 2420 2005 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.