The SeaArk 1860SLD 2007 vs SeaArk Forecast 170C 2009 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 — SeaArk 1860SLD 2007 at 18,0 ft versus SeaArk Forecast 170C 2009 at 17,0 ft. Weight tells a clearer story for trailering families: the SeaArk Forecast 170C 2009 tips the scales at 775 lbs — 722 lbs less than the SeaArk 1860SLD 2007 at 53 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 SeaArk Forecast 170C 2009 tops out at 75 hp. Engine specs for the SeaArk 1860SLD 2007 aren't listed — confirm with a dealer before selecting an outboard.
For family outings this is probably the sharpest distinction between the two. The SeaArk 1860SLD 2007 is rated for 7 passengers, while the SeaArk Forecast 170C 2009 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the SeaArk 1860SLD 2007 could be the deciding factor.
Bottom line: Choose the SeaArk 1860SLD 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 SeaArk Forecast 170C 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.