Grady-White Marlin 300 Boats For Sale

The Grady-White Marlin 300 is a 30-foot 6-inch offshore walkaround that pairs the protected helm of an express fishboat with the fishing access of a center console, while keeping enough accommodation below to work as an overnighter. Its 10-foot 7-inch beam runs more than a foot wider than many boats in class, which steadies the platform with several people moving to one side. Draft is 23 inches, the hull carries a 19.5-degree deadrise at the transom, and the closed foredeck, high windshield and protected bridge shed green water to keep the boat dry offshore. A version has been in the Grady-White lineup since 1989, and current boats use the company's CV2 hull design.

Performance comes from twin 300-horsepower Yamaha V6 4.2-liter four-stroke outboards. At an estimated test weight of 10,615 pounds, with an 8,221-pound empty weight, the Marlin 300 reached a top speed of 50 mph at 5900 RPM. Best cruise fell at 3500 RPM, where the boat ran 27.6 mph and returned 1.5 miles per gallon. On the 282-gallon fuel capacity, that fuel consumption gives a range of about 390 statute miles with a 10 percent reserve. It planed in 3.3 seconds, hit 20 mph in 3.9 seconds and 30 mph in 6.9 seconds, and carved through one-foot chop predictably under helm input.

The helm carries Yamaha digital electronic controls and digital electronic steering, hiding shift and steering hardware so the swim platform stays clear of cables and steering rams. The Helm Master EX joystick adds station-keeping that holds the boat on point by clicking the engines in and out of gear, plus autopilot with heading hold, course hold, track point and pattern steering integrated to the Garmin displays. Optional Command Elite chairs adjust for height, swivel and tilt with ventilated backrests and flip-up bolsters, and the wheel tilts on its base. A bow thruster is optional, with its control mounted to port of the wheel.

Fishing layout is the boat's core. The cockpit measures 8 feet 10 inches bolster to bolster, 6 feet 6 inches from transom to bait prep station, and 28 inches deep, with padded combing bolsters and a toe rail to brace against. Boats can carry up to 13 rod holders around the cockpit and hardtop, three rod storage racks under each gunwale, a 290-quart insulated fish box, and a 32-gallon raw water live well with rounded corners and overboard drain. The bait prep station has a freshwater sink, insulated bait box and tackle storage with removable boxes. A transom door opens to the stern platform with a four-step ladder, and the self-bailing cockpit drains overboard rather than into the bilge. An optional Fischer Panda 5 kW generator and the batteries sit under easy-access hatches.

Below, the cabin has a galley to port with a sink with hot and cold water, an electric stove top on a Corian counter, a microwave and a refrigerator. The bow dinette uses a cherry wood table that lowers to convert to a V-berth, an enclosed wet head with standing headroom sits to starboard, and a crawl-in mid cabin holds a double berth with an opening port light and four rod holders. A teak and holly sole, a 6-gallon water heater and a 32-gallon fresh water tank are standard, and the boat sleeps about four. Strataglass front and side curtains close the gap to the hardtop, making it a three-season boat.

For buyers looking at Grady-White Marlin 300 boats for sale, build quality shows in the thick fiberglass hatches and stainless hardware, and used examples turn up heavily optioned. One 2019 boat carried Scotty downriggers, a crab pot puller, a Webasto diesel furnace, a third Garmin display and upgraded seats, reflecting how owners equip these for serious offshore and commuting use.