Isometric 3D rendering of the dual fuel tank replacement kit for a 2006 Grady-White Marlin 300, featuring the 155-gallon main tank and 149-gallon auxiliary tank with a textured coal-tar epoxy finish and pre-installed rigging hardware.
Dimensional diagram for a 149-gallon auxiliary OEM replacement fuel tank for a 2006 Grady-White Marlin 300, showing engineering measurements: 46" length, 37.5" width, and 21.5" height with a V-hull bottom profile and mill-finish aluminum.
Dimensional diagram for a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring measurements: 46" length, 37.5" width, and 22.25" height with a precision V-bottom hull profile and mill-finish aluminum.
Close-up 3D rendering of the dual fuel tank replacement system for a 2006 Grady-White Marlin 300, showcasing the textured coal-tar epoxy finish, pre-installed fuel sending units, brass fittings, and ABYC-compliant certification labels.
Isometric 3D rendering of a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring a corrosion-resistant coal-tar epoxy finish, integrated V-bottom hull profile, and top-mounted rigging hardware.
Internal cross-section 3D rendering of a Grady-White Marlin 300 replacement fuel tank, showcasing the heavy-duty aluminum baffles, dual fuel pickup tubes with anti-siphon protection, and precision-mounted reed-style sending unit.
Top-down internal 3D rendering of a Grady-White Marlin 300 replacement fuel tank, showing the precision-cut baffles for fuel slosh control, dual pickup tubes, and reed-style sending unit for accurate fuel level monitoring.
High-detail 3D rendering of the top rigging surface on a Grady-White Marlin 300 fuel tank, highlighting the textured coal-tar epoxy coating, stainless steel fuel fills, brass fittings, and ABYC-compliant safety labeling.
Top-down plan view 3D rendering of a 155-gallon main replacement fuel tank for a Grady-White Marlin 300, detailing the precise layout of fuel fills, vents, sending unit, and ABYC/NMMA certification label on a coal-tar epoxy finished surface.
Underside 3D rendering of a Grady-White Marlin 300 replacement fuel tank, highlighting the precision-engineered V-bottom profile and coal-tar epoxy protective finish designed for a perfect hull-deadrise fit.
Front-profile 3D rendering of a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, showcasing the tapered V-bottom hull profile, textured coal-tar epoxy finish, and top-mounted fuel sending unit with rigging hardware.
Close-up 3D rendering of the top-mounted rigging hardware for a 2006 Grady-White Marlin 300 fuel tank, featuring brass 90-degree fittings, a pre-wired fuel sending unit, and an ABYC-compliant certification label on a coal-tar epoxy finish.
Welding World Inc. certification label for a 2006 Grady-White Marlin 300 auxiliary fuel tank, showing a 149-gallon capacity, .190" thickness, and 5052-H-32 aluminum material. Includes ABYC and NMMA compliance logos and USCG 33 CFR § 183.510(a) test standards.
Welding World Inc. certification label for a 2006 Grady-White Marlin 300 main fuel tank, showing a 155-gallon capacity, heavy-duty .190" thickness, and 5052-H-32 aluminum material. Displayed alongside ABYC and NMMA compliance logos and USCG 33 CFR § 183.510(a) test standards.
Isometric 3D rendering of a 149-gallon auxiliary OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring a corrosion-resistant coal-tar epoxy finish, precision V-bottom profile, and top-mounted rigging hardware.
High-detail 3D rendering of the rigging hardware on a 149-gallon auxiliary fuel tank for a Grady-White Marlin 300, featuring a textured coal-tar epoxy finish, brass fuel pickup fittings, pre-wired sending unit, and ABYC-compliant certification label.
High-angle isometric 3D rendering of the 304-gallon total fuel tank replacement kit for a 2006 Grady-White Marlin 300, showing both the 155-gallon main and 149-gallon auxiliary tanks with a protective coal-tar epoxy finish and top-mounted rigging ports.
Isometric 3D rendering of a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring a corrosion-resistant coal-tar epoxy finish, precision V-bottom profile, and top-mounted rigging hardware.
Front-profile 3D rendering of a 149-gallon auxiliary OEM replacement fuel tank for a 2006 Grady-White Marlin 300, showcasing the precision V-bottom hull profile, textured coal-tar epoxy finish, and top-mounted fuel sending unit with rigging hardware.
Detailed close-up 3D rendering of the fuel fill and vent assembly on a Grady-White Marlin 300 fuel tank, showcasing high-grade stainless steel fittings, professional TIG welds, and a textured coal-tar epoxy corrosion-resistant coating.
Isometric 3D rendering of the dual fuel tank replacement kit for a 2006 Grady-White Marlin 300, featuring the 155-gallon main tank and 149-gallon auxiliary tank with a textured coal-tar epoxy finish and pre-installed rigging hardware.
Dimensional diagram for a 149-gallon auxiliary OEM replacement fuel tank for a 2006 Grady-White Marlin 300, showing engineering measurements: 46" length, 37.5" width, and 21.5" height with a V-hull bottom profile and mill-finish aluminum.
Dimensional diagram for a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring measurements: 46" length, 37.5" width, and 22.25" height with a precision V-bottom hull profile and mill-finish aluminum.
Close-up 3D rendering of the dual fuel tank replacement system for a 2006 Grady-White Marlin 300, showcasing the textured coal-tar epoxy finish, pre-installed fuel sending units, brass fittings, and ABYC-compliant certification labels.
Isometric 3D rendering of a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring a corrosion-resistant coal-tar epoxy finish, integrated V-bottom hull profile, and top-mounted rigging hardware.
Internal cross-section 3D rendering of a Grady-White Marlin 300 replacement fuel tank, showcasing the heavy-duty aluminum baffles, dual fuel pickup tubes with anti-siphon protection, and precision-mounted reed-style sending unit.
Top-down internal 3D rendering of a Grady-White Marlin 300 replacement fuel tank, showing the precision-cut baffles for fuel slosh control, dual pickup tubes, and reed-style sending unit for accurate fuel level monitoring.
High-detail 3D rendering of the top rigging surface on a Grady-White Marlin 300 fuel tank, highlighting the textured coal-tar epoxy coating, stainless steel fuel fills, brass fittings, and ABYC-compliant safety labeling.
Top-down plan view 3D rendering of a 155-gallon main replacement fuel tank for a Grady-White Marlin 300, detailing the precise layout of fuel fills, vents, sending unit, and ABYC/NMMA certification label on a coal-tar epoxy finished surface.
Underside 3D rendering of a Grady-White Marlin 300 replacement fuel tank, highlighting the precision-engineered V-bottom profile and coal-tar epoxy protective finish designed for a perfect hull-deadrise fit.
Front-profile 3D rendering of a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, showcasing the tapered V-bottom hull profile, textured coal-tar epoxy finish, and top-mounted fuel sending unit with rigging hardware.
Close-up 3D rendering of the top-mounted rigging hardware for a 2006 Grady-White Marlin 300 fuel tank, featuring brass 90-degree fittings, a pre-wired fuel sending unit, and an ABYC-compliant certification label on a coal-tar epoxy finish.
Welding World Inc. certification label for a 2006 Grady-White Marlin 300 auxiliary fuel tank, showing a 149-gallon capacity, .190" thickness, and 5052-H-32 aluminum material. Includes ABYC and NMMA compliance logos and USCG 33 CFR § 183.510(a) test standards.
Welding World Inc. certification label for a 2006 Grady-White Marlin 300 main fuel tank, showing a 155-gallon capacity, heavy-duty .190" thickness, and 5052-H-32 aluminum material. Displayed alongside ABYC and NMMA compliance logos and USCG 33 CFR § 183.510(a) test standards.
Isometric 3D rendering of a 149-gallon auxiliary OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring a corrosion-resistant coal-tar epoxy finish, precision V-bottom profile, and top-mounted rigging hardware.
High-detail 3D rendering of the rigging hardware on a 149-gallon auxiliary fuel tank for a Grady-White Marlin 300, featuring a textured coal-tar epoxy finish, brass fuel pickup fittings, pre-wired sending unit, and ABYC-compliant certification label.
High-angle isometric 3D rendering of the 304-gallon total fuel tank replacement kit for a 2006 Grady-White Marlin 300, showing both the 155-gallon main and 149-gallon auxiliary tanks with a protective coal-tar epoxy finish and top-mounted rigging ports.
Isometric 3D rendering of a 155-gallon main OEM replacement fuel tank for a 2006 Grady-White Marlin 300, featuring a corrosion-resistant coal-tar epoxy finish, precision V-bottom profile, and top-mounted rigging hardware.
Front-profile 3D rendering of a 149-gallon auxiliary OEM replacement fuel tank for a 2006 Grady-White Marlin 300, showcasing the precision V-bottom hull profile, textured coal-tar epoxy finish, and top-mounted fuel sending unit with rigging hardware.
Detailed close-up 3D rendering of the fuel fill and vent assembly on a Grady-White Marlin 300 fuel tank, showcasing high-grade stainless steel fittings, professional TIG welds, and a textured coal-tar epoxy corrosion-resistant coating.

Grady White Marlin WA 300 Fuel Tank (155 gal) Aux (149 gal) combo | 2006 OEM Replacement

$ 3,999.00
/
  • Local pickup available
  • Over-sized & over-weight item.
  • Only Ships LTL Freight.
  • Call us Mon.-Fri. 9:00 a.m. to 4:00 p.m. if in any doubt.

Engineered for the offshore demands of the Grady-White Marlin 300, this dual-tank replacement kit restores the long-range fuel capacity and peace of mind your vessel requires. Whether you're refreshing your 2006 model or performing a full restoration, our 155-gallon main and 149-gallon auxiliary tanks are precision-fabricated to replicate the exact OEM geometry of the factory originals. Forget the stress of 'close enough' fits; these units slide directly into your stringer layout, allowing you to bypass complex hull modifications and get back to the canyon with confidence.

 

  • Guaranteed to Fit Your Grady White
    Every tank is engineered using OEM drawings and/or reverse-engineered from an original unit to ensure a precise, 100% guaranteed fit.  

 

  • Fully Certified Manufacturing
    Our tanks are built by an NMMA-type certified manufacturer and produced in accordance with all ABYC standards.

 

  • USCG Compliant & Pressure Tested
    Each tank meets all USCG requirements and is individually pressure-tested in house. All federal regulations are followed throughout our manufacturing process to ensure maximum safety and reliability.

 

  • .190-Thickness 5052 H32 Aluminum Construction
    Built from premium marine-grade 5052 H32 aluminum at .190 thickness for exceptional strength and long-term durability.

 

  • Complete, Ready-to-Install System
    Each tank comes fully equipped with all required components, including the sender, fittings, and hardware.

 

  • Precision Hand-Welded Construction
    Every tank is hand-crafted using GTAW (TIG) welding, exceeding ASME and AWS D3.7:2004 standards for marine aluminum fabrication.                                                   

 

  • Sherwin-Williams® TarGard® Epoxy Coating
    Finished with Sherwin-Williams® TarGard® Epoxy to provide added protection against corrosion and harsh marine environments, extending the overall life of the tank.

 

  • KUS® (formerly WEMA USA®) Reed-Switch Fuel Level Sender
    Features a high-quality KUS® reed-switch sender with an NBR float, providing accurate and reliable fuel-level measurement.

 

Buy with confidence. Shortly after your payment clears you'll be sent via e-mail a complete set of detailed drawings for you to check all dimensions and fittings positions. If there's any difference from your old tank we can make any reasonable modifications to accommodate your needs. Fabrication of your new tank won't start until you send us your specs confirmation.  

 

IMPORTANT NOTE: The base price is for local pickup in our SW Miami Shop. Check options above for crating and shipping to the contiguous 48 States. All tanks are made to order and the fabrication lead time is 1-2 work weeks. The finished tank pickup window is also 1-2 work weeks, so make sure you will be able to take delivery of your finished tank within that timeframe.     

 

NOTE: Check your tank dimensions thoroughly! Once a tank is manufactured and/or shipped we can't be responsible for mismatches and refunds or returns won't be accepted. All sales are final!

 

Shipping: Only freight to the 48 contiguous states. Contact us for extra-cost shipping options for HI and AK. Orders for international shipping from US-based carriers are welcome but contact us first to coordinate details.

 

Return Policy: No refunds are accepted, as all of our products are made to order. Our policy is strictly limited to the repair or replacement of qualifying defective or damaged goods. Please note that shipping costs are non-refundable. 

 

Fabrication lead time (before shipping): 1-2 work weeks. 

Due to this item's size and weight we can only ship it in an economical way via Less Than Truckload (LTL) consolidated land shipping, and only to the contiguous 48 States.

For shipping inquiries to AK, HI, PR, US-VI, and international shipping, please contact us first at sales@weldingworldinc.com.

All of the destinations above we can only serve as a Free Carrier (or FCA) modality, that requires the customer to contract and pay for their carrier service of choice. We can still ship the item, but only to a warehouse/receiving office within the 48-contiguous States.

In plain terms what this means is that if you want to ship your product to any non-contiguous US territory or internationally, you, the customer, has to provide us with the warehouse address of the carrier that serves your locality with an address within the contiguous 48-US States, as we do not ship overseas on our own.

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