When two boats share the same hull type — in this case both the Larson 1700 LX 2010 and the Larson Senza 186 2009 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 — Larson 1700 LX 2010 at 16,9 ft versus Larson Senza 186 2009 at 18,0 ft. Weight tells a clearer story for trailering families: the Larson 1700 LX 2010 tips the scales at 165 lbs — 138 lbs more than the Larson Senza 186 2009 at 27 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 Larson 1700 LX 2010 carries a rated maximum of 115 hp. Engine data for the Larson Senza 186 2009 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Larson Senza 186 2009 carries 29 gallons versus 23 gallons in the Larson 1700 LX 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Larson Senza 186 2009 is rated for 9 passengers, while the Larson 1700 LX 2010 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson Senza 186 2009 could be the deciding factor.
Bottom line: Choose the Larson Senza 186 2009 if your priority is putting more people on the water — it handles 9 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Larson 1700 LX 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.