When two boats share the same hull type — in this case both the Sea Chaser 170 BR 2011 and the Sea Chaser 180 FS 2011 are modified vee designs with fiberglass 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 — Sea Chaser 170 BR 2011 at 16,5 ft versus Sea Chaser 180 FS 2011 at 17,8 ft. At 154 lbs and 172 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 150 hp, the Sea Chaser 180 FS 2011 has a 35-hp advantage over the Sea Chaser 170 BR 2011's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Sea Chaser 170 BR 2011 is rated for 5 passengers, while the Sea Chaser 180 FS 2011 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Chaser 170 BR 2011 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Sea Chaser 180 FS 2011 comes in at 1 lbs per hp versus 1 lbs per hp for the Sea Chaser 170 BR 2011. 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 Sea Chaser 170 BR 2011 if your priority is putting more people on the water — it handles 5 passengers and at 16,5 ft it has the deck room to back that rating up comfortably. The Sea Chaser 180 FS 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.