437 NM at Cruise | Used-Boat Red Flags | Thruster Retrofit - 7/21/2026

437-NM RANGE BoatTEST clocked the Riviera 5600 Sport Yacht at 31.5 knots wide open and 17.3 knots at her most efficient cruise, good for 437 nautical miles with a 10 percent fuel reserve. At that pace the twin Volvo IPS pods give her more than 25 hours of endurance, enough to run Jacksonville to New York City on a single fuel stop.
 

MORE ROOM The cat hull gives the 235TE noticeably more usable deck space than a monohull of similar length, making it easier to work a fish around the boat or move between bow and cockpit. Twin 150-hp Yamahas pushed her to 48.5 mph, while a commercial-grade dive ladder and swim platform expand her use beyond fishing.
 

FULLY EQUIPPED Configured for offshore fishing, Free Spool carries upgraded MTU power, a Furuno electronics suite, hydraulic outriggers, cockpit refrigeration, and a Seakeeper SK26. Engine warranty extends through December 2027 or 3,400 hours.
 

TWO PATHS The C110 keeps Aspen's patented asymmetric hull but now lets buyers choose between the company's hull-matched 175/225-hp outboard setup or twin 225s for more speed. Hull changes also add buoyancy aft, free up cockpit space, and extend the swim platform by 16 inches.
 

HULL SURGERY A bow thruster retrofit can involve far more than fitting the unit. This installation required careful tunnel placement, extra timber reinforcement, a dedicated battery near the bow, and precise alignment before the boat returned to the water.
 

HIDDEN RED FLAGS Milky residue on the dipstick can indicate water in the engine. That's one of several checks worth knowing before an in-person viewing. This inspection checklist walks through what to look for in the hull, engine, electrics, and interior, plus a few questions worth asking the seller.