Updated: 25 Feb 2025

marine gas cap replacements

Explore up to 31% Off

Updated: 25 Feb 2025

#1

Best Choice
Perko 0540DPG99A Cap, O-Ring and Retainer for Vented Fuel Fills for 1-1/2" Angled Neck Vented Fills - Gas

9.9

Perko

-31%

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Why we love it

Durable chrome plated bronze cap for longevity.

Includes a beaded chain for added security.

Comes with a deck plate key for convenience.

Main highlights

Chrome Plated Bronze Cap
The cap features a robust chrome plated bronze construction, ensuring durability and resistance to corrosion.

Ideal for Boat Fuel Tanks
Perfect replacement for various boat models, especially those manufactured before 2010 EPA fuel cap requirements.

Exact Fit and Easy Installation
Customers consistently praise the cap for its perfect fit and straightforward installation process, making it a reliable replacement.

-31%
#2

Value for Money
Five Oceans 1-1/2-Inch Boat Gas Deck Fill/Filler, Marine Fuel Deck Filler with Flip Top Cap Design, Straight Neck, for Pontoon, Fishing Boats, Bass Boat, Sport Yachts, Sailboats - FO1797

9.6

Five Oceans

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Main highlights

MEASUREMENTS - Straight Neck filler is designed to fit in a 1-1/2-Inch I.D. fill hose. Flange Diameter: 3-5/16-Inch (84mm). Inside Height: 3-1/4-Inch (82mm). 4 Screws (not Included) needed for installation

MARINE-GRADE MATERIAL - Made of High-Performance Black Polymer Body. This Boat Gas Deck Filler is UV Resistant. It can resist the hard conditions of the marine environment

KEYLESS DESIGN - New Stylish flip-top cap design with bottom security lock. Includes a professionally tested rubber O-ring to prevent leakage of fuel or water. No more losing or misplacing the cap
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How do we rank
Our AI-powered platform ranks products using multiple weighted factors from millions of products and user reviews across the web, providing the most valuable and real data. Higher scores rank first.
#3
Perko 1319DPGBLK Vented Fuel Fills , black

9.3

Perko

-21%

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Main highlights

No ground wire required

Easy installation

Black polymer construction.Fit Type: Universal Fit

-21%
#4
SEACHOICE Replacement Gas Fill Cap, Non-Locking

9.2

SEACHOICE

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Main highlights

This is a non-locking cap

Ideal as a spare or replacement cap

Constructed of durable black plastic that won't rust
#5
Vent Gas Cap for Boat Fuel Tank Marine Manual Fuel Tank Caps Replacement Moeller Tempo Fuel Tank (621501-10)

8.9

Ahuliao

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Main highlights

【Replacement Part Number】621501-10

【Material】The boat gas cap replacement is made of durable plastic, which not only ensures the durability of the fuel tank cap, but also has good chemical resistance. It can resist the erosion of acids, alkalis and solvents, and can maintain performance even in harsh environments.

【Compatibility】The boat gas tank cap is suitable for a variety of fuel tank models, including 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, and 730025.
#6
Manual Vent Gas Cap Compatible with Old Style Portable Boat Gas Tank, 621501-10 Gas Tank Cap, Black

8.8

Alocs

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Main highlights

【Manually Vented】Our manually vented gas cap features a twist valve for adjustable ventilation. Fits tight with no leaks and the vent screw is easy to turn for release and close.

【Compatibility】Boat gas tank cap fits A'ttwood 12 gallon, 6 gallon and 3 gallon tanks, B'ass Tracker boat tank, S'cepter 12 gal and 6 gallon tank, 3 gallon Q'uicksilver plastic gas tank, old 6 gallon plastic Dura-Tank Essence, M'ercury plastic tank, Y’amaha and more.

【621501-10 Manual Vent Gas Cap】 Vented fuel tank cap is specifically designed to be compatible with old style portable M'oeller and T'empo fuel tanks.
#7
SEACHOICE Replacement Gas Fill Cap, Cast Stainless Steel

8.7

SEACHOICE

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Main highlights

When open, cap is tethered by included beaded chain

High-quality replacement cap for Seachoice deck mount fill plates

Fabricated from cast stainless steel for superior corrosion resistance
#8
CNRAQR 1-1/2"(38mm) Boat Gas/Fuel/Diesel/Water/Waste Deck Fill/Filler with Keyless Cap Tank Key Cap Marine Mirror-Polished 316 Stainless Steel Hardware for Boat Yacht Caravan

8.6

CNRAQR

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Main highlights

SIMPLE AND EASY TO USE: This water deck fill cap is equipped with a built-in carabiner, making it easy to open or close the lid. Stainless steel retaining chain prevents the lid from being lost or misplaced. Easy to install, fits standard size marine fuel filler neck holes, no extra tools required

MULTIPLE APPLICATION SCENARIOS: The fuel tank filler neck for decks is not only suitable for boats, but also can be used for yachts, RVs, trucks and other various occasions. The surface of the product is highly polished, corrosion-resistant, sun-proof and waterproof, which is not only durable but also has a flashy appearance

CORROSION RESISTANT HIGH QUALITY MATERIALS:Our water deck fill is made of 316 stainless steel, which has excellent corrosion and wear resistance, prolonging its service life. The stainless steel material and polished surface effectively prevent rusting, ensuring good appearance and performance in all environments
#9
1Pack Cabin Hardware Deck Fill Cap 316 Stainless Steel Boat Accessories Boat Parts Deck Fill Replacement Cap Silver (Size: with 2" hose)

8.4

NRC&XRC

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Main highlights

Stainless steel chain to avoild losing or misplacing cap

Mirror polished, corrosion resistance and durable

Cap will fill a Stainless Steel deck fill with 2” Hose
#10
Vent Gas Cap Replacement for Boat Fuel Tank, Marine Manual Fuel Tank Part for Moeller Tempo Gas Tank 621501-10, Black, 1 Pack

8.1

Dairrr Fuuu

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Main highlights

【Wide Compatibility】The boat fuel tank gas cap compatible with Moeller Tempo gas tank, also fit for a variety of fuel tank models, including 031103, 031106, 031109, 031112, 031212, 620003, 620049, 630012, 630013, 630014, 620040, 720040, 730014, and 730025. The Part Number is 621501-10.

【Sealing Fuel Tank】The manually vented gas cap creates a tight seal with the fuel tank opening, prevents fuel from leaking out. The marine gas cap also stops air and water from entering the fuel tank，prevents the mixing of water and oil, thereby avoiding interference with the combustion process and corrosion of the fuel system.

【Manual Venting】The marine fuel tank cap features a twist valve for adjustable ventilation, has a manual venting function, which can prevent fule tank from internal collapse or expansion due to changes in external factors.

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marine gas cap replacements

Perko 0540DPG99A Cap, O-Ring and Retainer for Vented Fuel Fills for 1-1/2" Angled Neck Vented Fills - Gas

9.9

Why we love it

Main highlights

Five Oceans 1-1/2-Inch Boat Gas Deck Fill/Filler, Marine Fuel Deck Filler with Flip Top Cap Design, Straight Neck, for Pontoon, Fishing Boats, Bass Boat, Sport Yachts, Sailboats - FO1797

9.6

Main highlights

Perko 1319DPGBLK Vented Fuel Fills , black

9.3

Main highlights

SEACHOICE Replacement Gas Fill Cap, Non-Locking

9.2

Main highlights

Vent Gas Cap for Boat Fuel Tank Marine Manual Fuel Tank Caps Replacement Moeller Tempo Fuel Tank (621501-10)

8.9

Main highlights

Manual Vent Gas Cap Compatible with Old Style Portable Boat Gas Tank, 621501-10 Gas Tank Cap, Black

8.8

Main highlights

SEACHOICE Replacement Gas Fill Cap, Cast Stainless Steel

8.7

Main highlights

CNRAQR 1-1/2"(38mm) Boat Gas/Fuel/Diesel/Water/Waste Deck Fill/Filler with Keyless Cap Tank Key Cap Marine Mirror-Polished 316 Stainless Steel Hardware for Boat Yacht Caravan

8.6

Main highlights

1Pack Cabin Hardware Deck Fill Cap 316 Stainless Steel Boat Accessories Boat Parts Deck Fill Replacement Cap Silver (Size: with 2" hose)

8.4

Main highlights

Vent Gas Cap Replacement for Boat Fuel Tank, Marine Manual Fuel Tank Part for Moeller Tempo Gas Tank 621501-10, Black, 1 Pack

8.1

Main highlights

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