Marlin 300
30' WALKAROUND CABIN
The first model built on the exclusive SeaV²® hull, the Marlin 300 offers amazing performance and true offshore saltwater fishing boat capability. Since that first design over three decades ago, the Marlin 300 has been refined through customer input and Grady’s acclaimed exceptional attention to detail. From the high windshield with ventilated tempered glass to the plush seating and luxurious cabin, this is a much-loved, legendary 30-foot walkaround fishing boat with abundant family-friendly details.
Photo Gallery
Grady-White Marlin 300 30-foot walkaround cabin boat cruising with port side in view
Grady-White Marllin 300 30-foot walkaround cabin cruising with starboard side in view
Grady-White Marlin 300 30-foot walkaround cabin boat running starboard aft
Grady-White Marlin 300 30-foot walkaround cabin boat helm
Grady-White Marlin 300 30-foot walkaround cabin boat cockpit
Grady-White Marlin 300 30-foot walkaround cabin boat interior with galley
Grady-White Marlin 300 30-foot walkaround cabin boat interior forward berth
Grady-White Marlin 300 30-foot walkaround cabin boat windshield
Grady-White Marlin 300 30-foot walkaround cabin boat painted hardtop frame
Grady-White Marlin 300 30-foot walkaround cabin boat interior galley and storage
Grady-White Marlin 300 30-foot walkaround cabin boat interior galley storage and stereo system
Grady-White Marlin 300 30-foot walkaround cabin boat interior head
Grady-White Marlin 300 30-foot walkaround cabin boat interior head door with mirror
Grady-White Marlin 300 30-foot walkaround cabin boat refrigerator
Grady-White Marlin 300 30-foot walkaround cabin boat aft berth
Grady-White Marlin 300 30-foot walkaround cabin boat aft bench seat
Grady-White Marlin 300 30-foot walkaround cabin boat livewell
Grady-White Marlin 300 30-foot walkaround cabin boat rigging station
Marlin 300 Main Specifications
Beam Amidships
10'7" (3.23 m)
Center Line Length w/o Engines
30'6" (9.30 m)
Bridge Clearance
9'9" (2.97 m)
Weight w/o Engines
8221 lb. (3729 kg)
Cockpit Depth
29" (0.74 m)
Hull Draft
23" (0.58 m)
Transom Deadrise
19.5 degrees (SeaV2® progression)
Maximum HP
700 (522 kW)
Fuel Capacity - Standard
282 gal. (1067 l)
Marlin 300 Features & Options
Select camera icons where available to view feature photos
Denotes feature as trademarked, exclusive, patented, or patent pending
2 automatic bilge pumps (total 2600 GPH) (9842 LPH)
Basic flotation
Bow rail - 316 grade stainless steel
Cockpit toe rails
Composite stringer system & transom - water impervious
Nonskid fiberglass liner
Nonskid recessed walkaround
Self-bailing cockpit w/cockpit drains (4)
Stainless steel through-hull fittings
Accessory outlet - 5V duplex USB port
Berth - aft double berth
Berth - forward vee berth
Carbon monoxide detector
Door - lockable w/screen & companionway hatch
Forward hatch - low profile acrylic hatch w/screen & shade
Galley - port galley w/sink, light & Corian® cutting board
Head - enclosed head area w/sink, shower, lamp & VacuFlush® marine head w/freshwater supply, 10-gallon (38 l) holding tank, overboard discharge & deck pump out
Lighting - dome (2)
Lighting - reading (3)
Microwave oven
Mirror
Refrigerator - stainless steel
Rod storage - aft berth horizontal (4)
Rod storage - forward horizontal (6)
Stereo system w/waterproof touch screen display, AM/FM tuner, Wi-Fi & Bluetooth® connectivity & remote unit; speakers w/LED lights - helm (2), cabin (2), cockpit (2)
Storage - galley cabinets & counter
Storage - under berth compartments
Storage nets
Stove - electric glass top
Table - cherry
Teak & holly sole
Water heater - 6-gallon (22.7 l), 120V
Water tank - 32-gallon (121.1 l) freshwater
Windows - tinted frameless acrylic w/shade
100% hand laid SeaV² hull & deck
Accessory outlet - 5V duplex USB port
Accessory outlet - 12V
Anchor windlass w/rode, line, and remote switches at helm & windlass
Batteries (4) w/battery select switches (one per engine) & charger system (1)
Bow pulpit w/roller
Cleats
Cockpit bolsters
Cockpit freshwater shower w/hot & cold mixer
Cockpit lights - blue LED
Cockpit side door - port w/boarding ladder
Companion grab rail
Deck hardware - 316 grade stainless steel through-bolted
Dockside power w/galvanic isolator
Drink holders - stainless steel (9)
Engine flush system w/hose attachment aft (one per engine)
Factory engine pre-rigging
Fighting chair reinforcement
Fish box - 290-qt. (274.4 l) aft insulated fish box w/light & ob drain
Flush mount electronics area
Footrests - helm & companion (fold down)
Freshwater level indicator
Fuel capacity - 282 gallons (141-gallon tank, 141-gallon tank) (1067 l)
Hardtop w/painted aluminum frame, radio box, storage nets, spreader lights, side mounted rod holders (4), outrigger plates & drop, front & side curtains (ivory)
Hydraulic trim tabs w/indicator & retractor
Integrated outboard mounting system w/swim platform & ladder
International lighting
Livewell - 32-gallon (121.1 l) port insulated raw water livewell w/light, full column distribution inlet & ob drain (1100 GPH pump) (4164 LPH)
Rigging station - freshwater sink, insulated bait box w/ob drain & lockable drawers
Rod holders - cockpit (4)
Rod storage racks - horizontal (3)
Rubrail - high density PVC w/stainless steel insert
Seating - Command Elite helm & companion chairs (2) horizontally & vertically adjustable w/deluxe cushioning & flip-up bolster
Seating - foldaway aft bench seat w/cushion
Seating - foredeck cushions
Seating - port livewell cushion
Seating - starboard rigging station cushion
Steering - Helm Master® EX w/Integrated Digital Electric Steering (does not include joystick)
Steering wheel - 316 grade stainless steel w/knob
Stern eyes - 316 grade stainless steel
Storage - aft deck lift out box
Storage - forward anchor locker w/rode storage
Storage - lockable storage under helm & companion seats
Storage - under step compartment
Transducer mounting flats
Transom door - fiberglass
Washdown - freshwater
Washdown - pressurized raw water w/hose
Water tank - 32-gallon (121.1 l)
Windshield - tempered glass w/side vents
Windshield wipers w/starboard washer
Air conditioning - 8000 BTU in cabin
Bow thruster
CE certification package (European Conformity)
Generator - 5kW diesel, 12-gallon (45.4 l) fuel capacity
Hardtop color - underside of fiberglass hardtop (requires matching gelcoat hull color option)
Hull color - Celestial Blue, Coastal Fog, Ocean Mist, or Sea Glass gelcoat
International AC electrical conversion - 220V (50Hz)
Lighting - underwater blue LED (3)
Outrigger kit - 18-ft. (5.5 m) crank hardtop mounted stainless steel outriggers w/carbon fiber poles
Painted hardtop top mounted rod holders (6)
Rod storage - folding cabin rack (4)
Seating - companion bench seat (replaces Command Elite companion chair)
Steering - Helm Master® EX w/Full Maneuverability
TV - 19" LED flat screen w/HDMI inlet
Marlin 300 Performance Data
300 Yamaha Four-Stroke
Twin
Top Speed: 49.5 MPH @ 5800 RPM
Optimum Cruise: 29.7 MPH @ 3800 RPM
GPH at Optimum Cruise: 21.5
MPG at Optimum Cruise: 1.38
CLASSIC WHITE
Standard
350 Yamaha Four-Stroke
Twin
Top Speed: 54.9 MPH @ 6000 RPM
Optimum Cruise: 29.6 MPH @ 3500 RPM
GPH at Optimum Cruise: 17.6
MPG at Optimum Cruise: 1.68
CLASSIC WHITE
Standard
300 Yamaha Four-Stroke
Twin
Engine Size
4.2L
Test Date
9/22/2010
Prop Size
15 1/2 X 17 SWS II SDS
Weight as Tested
11697 lb. (including persons, fuel, water, gear, engines & accessories)
Hardtop
Yes
Bow Pulpit
Yes
Bottom Paint
No
Optimum Cruise
29.7 MPH @ 3800 RPM
| RPM | MPH | GPH | MPG |
|---|---|---|---|
| 1000 | 6.0 | 2.6 | 2.31 |
| 1500 | 7.9 | 4.1 | 1.94 |
| 2000 | 8.8 | 6.7 | 1.31 |
| 2500 | 9.7 | 10.0 | 0.97 |
| 3000 | 14.6 | 12.8 | 1.14 |
| 3500 | 26.4 | 18.0 | 1.47 |
| 3800 | 29.7 | 21.5 | 1.38 |
| 4000 | 31.5 | 23.9 | 1.32 |
| 4500 | 36.6 | 30.7 | 1.19 |
| 5000 | 42.0 | 40.4 | 1.04 |
| 5500 | 46.4 | 50.7 | 0.92 |
| 5800 | 49.5 | 52.3 | 0.95 |
350 Yamaha Four-Stroke
Twin
Engine Size
4.3L
Test Date
5/2/24
Prop Size
15 1/4 X 19 SWS II SDS
Weight as Tested
11411 lb. (including persons, fuel, water, gear, engines & accessories)
Hardtop
Yes
Bow Pulpit
No
Bottom Paint
No
Optimum Cruise
29.6 MPH @ 3500 RPM
| RPM | MPH | GPH | MPG |
|---|---|---|---|
| 1000 | 6.3 | 2.5 | 2.52 |
| 1500 | 8.6 | 4.3 | 2.00 |
| 2000 | 10.1 | 6.9 | 1.46 |
| 2500 | 13.9 | 10.7 | 1.30 |
| 3000 | 18.2 | 13.8 | 1.32 |
| 3500 | 29.6 | 17.6 | 1.68 |
| 4000 | 34.7 | 22.5 | 1.54 |
| 4500 | 40.0 | 28.7 | 1.39 |
| 5000 | 45.2 | 37.6 | 1.20 |
| 5500 | 50.3 | 51.1 | 0.98 |
| 6000 | 54.9 | 62.1 | 0.88 |
300 Yamaha Four-Stroke
Twin
Engine Size
4.2L
Test Date
9/22/2010
Prop Size
15 1/2 X 17 SWS II SDS
Weight as Tested
11697 lb. (including persons, fuel, water, gear, engines & accessories)
Hardtop
Yes
Bow Pulpit
Yes
Bottom Paint
No
Optimum Cruise
29.7 MPH @ 3800 RPM
| RPM | MPH | GPH | MPG |
|---|---|---|---|
| 1000 | 6.0 | 2.6 | 2.31 |
| 1500 | 7.9 | 4.1 | 1.94 |
| 2000 | 8.8 | 6.7 | 1.31 |
| 2500 | 9.7 | 10.0 | 0.97 |
| 3000 | 14.6 | 12.8 | 1.14 |
| 3500 | 26.4 | 18.0 | 1.47 |
| 3800 | 29.7 | 21.5 | 1.38 |
| 4000 | 31.5 | 23.9 | 1.32 |
| 4500 | 36.6 | 30.7 | 1.19 |
| 5000 | 42.0 | 40.4 | 1.04 |
| 5500 | 46.4 | 50.7 | 0.92 |
| 5800 | 49.5 | 52.3 | 0.95 |
350 Yamaha Four-Stroke
Twin
Engine Size
4.3L
Test Date
5/2/24
Prop Size
15 1/4 X 19 SWS II SDS
Weight as Tested
11411 lb. (including persons, fuel, water, gear, engines & accessories)
Hardtop
Yes
Bow Pulpit
No
Bottom Paint
No
Optimum Cruise
29.6 MPH @ 3500 RPM
| RPM | MPH | GPH | MPG |
|---|---|---|---|
| 1000 | 6.3 | 2.5 | 2.52 |
| 1500 | 8.6 | 4.3 | 2.00 |
| 2000 | 10.1 | 6.9 | 1.46 |
| 2500 | 13.9 | 10.7 | 1.30 |
| 3000 | 18.2 | 13.8 | 1.32 |
| 3500 | 29.6 | 17.6 | 1.68 |
| 4000 | 34.7 | 22.5 | 1.54 |
| 4500 | 40.0 | 28.7 | 1.39 |
| 5000 | 45.2 | 37.6 | 1.20 |
| 5500 | 50.3 | 51.1 | 0.98 |
| 6000 | 54.9 | 62.1 | 0.88 |
Marlin 300 Overhead
Select the hotspots below to learn more about the Marlin 300 features.
Marlin 300 Virtual Tour
Videos
MY2019 Marlin 300
BoatTEST.com: Marlin 300 Test
300 on the water
300 walkthrough
Customer Reviews
Industry Reviews
October 2020, New Zealand Fishing News - "Grady-White Marlin 300 One Serious Sportfisher"
Nov-Dec 2019, Pacific Power Boat - "Grady-White Marlin 300 WA"
2017, BoatTEST.com - "Grady-White Marlin 300 (2017-)"
January 2015, Soundings - "Grady-White 280 Marlin"
June 2007, Motorboating - "Grady-White 300"