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  3. HOLLEY R840402

HOLLEY Carburetor Boat R84040-2 1497

fits model: Marine.

R84040-2 Holley R840402 Carburetor List 1497 Marine Boat 4 Bbl

( Brand: Holley ), ( Manufacturer Part Number: R840402 ), ( Choke Type: Electric ), ( Type: Carburetor ), ( Mounting Flange Type: Spread Bore ), ( Material: Aluminum ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review HOLLEY Carburetor List Boat Bbl fits MARINE

The Holley R840402 carburetor, also known as the Marine R840-2, is a high-performance fuel delivery solution designed specifically for marine applications. This carburetor is a 4-barrel model, meaning it utilizes four separate barrels to deliver fuel to each cylinder for improved engine performance.

The R840402 carburetor is built with marine-grade materials, ensuring durability and resistance to the harsh marine environment. It features a unique venturi design optimized for marine applications, which provides excellent fuel atomization and air-fuel mixture for efficient combustion. This carburetor is ideal for use in outboard motors, inboard motors, and other marine engines.

One of the key features of the R840402 carburetor is its adjustable float levels, which allow for fine-tuning of the fuel mixture to optimize engine performance under various operating conditions. The carburetor also comes with adjustable idle mixture screws, allowing for easy adjustment of the idle speed and mixture for smooth engine operation.

The R840402 carburetor is designed to be easy to install, with a modular design that simplifies the installation process. It comes with a removable base plate, which allows for easy access to the engine and simplifies engine bay installation. Additionally, it features a built-in fuel pressure regulator, eliminating the need for an external regulator and simplifying the fuel system.

The R840402 carburetor is designed to be reliable and easy to maintain. It features a durable, corrosion-resistant finish that can withstand the harsh marine environment. The carburetor also comes with a replacement gasket kit, ensuring that routine maintenance is simple and cost-effective.

In summary, the Holley R840402 carburetor is a high-performance, marine-grade fuel delivery solution designed to provide efficient and reliable fuel delivery to marine engines. Its adjustable float levels and idle mixture screws allow for fine-tuning of the fuel mixture, while its modular design simplifies installation and maintenance. With its durable construction and corrosion-resistant finish, the R840402 carburetor is an excellent choice for boat owners looking to improve the performance and reliability of their marine engine.

The Holley R840402 carburetor, also known as the 1497 marine carburetor, is a popular choice for boat enthusiasts due to its high-performance capabilities and durability. However, like any product, it has its pros and cons that should be considered before making a purchase.

Pros:

1. High-performance: The Holley R840402 carburetor is designed to deliver superior fuel flow, making it an excellent choice for high-performance marine applications.

2. Adjustability: This carburetor offers easy adjustability, allowing users to fine-tune the air/fuel mixture for optimal engine performance.

3. Durability: Holley carburetors are known for their robust construction, making them ideal for the harsh marine environment.

4. Versatility: The R840402 can be used in a variety of marine applications, including outboard motors, inboard motors, and even some sterndrive applications.

5. Larger float bowls: The R840402 has larger float bowls than its predecessor, which helps improve fuel delivery and reduce fuel starvation issues.

Cons:

1. Complexity: Compared to some other marine carburetors, the Holley R840402 can be more complex to install and tune, requiring more time and expertise.

2. Cost: This carburetor is generally more expensive than some other options on the market.

3. Fuel consumption: The high-performance capabilities of the Holley R840402 can lead to increased fuel consumption compared to other carburetors.

4. Maintenance: The carburetor requires regular maintenance, including adjustments and cleaning, to ensure optimal performance.

Conclusion:

The Holley R840402 carburetor is a high-performance, durable, and versatile option for marine applications. Its adjustability and large float bowls make it an excellent choice for boat enthusiasts who demand the best from their engines. However, its complexity, cost, fuel consumption, and maintenance requirements are important considerations that should be weighed against the benefits.

Recommendation:

If you're looking for a high-performance marine carburetor and are willing to invest the time and expertise required for installation and tuning, the Holley R840402 is an excellent choice. However, if you're on a budget or prefer a simpler option, there are other carburetors on the market that may better suit your needs. Ultimately, it's essential to weigh the pros and cons carefully and consult with a marine engine expert before making a decision.

Details:

Carb has been sitting for years so will need the usual TLC. Holley Carburetor List R84040-2 1497 Marine Boat 4 BBL. Exactly as shown.

part #: r840402 prices

  • $6.99-$292.50

specifications carbcoon:

  • for models: Marine
  • brand: Holley
  • mpn: R840402
  • choke type: Electric
  • type: Carburetor
  • mounting flange type: Spread Bore
  • material: Aluminum
  • vintage part: Yes
  • country of origin: United States

seller carbcoon:

  • # reviews: 23022
  • city: Ridgefield, Washington
  • rating: 99.8%

payments carbcoon:

  • wallet: Apple-pay
  • other
  • credit card: Diners-club

offer carbcoon:

  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • quantity: 1
  • started: March 16, 2026

general carbcoon:

  • condition: Used
  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

returns carbcoon:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Seller

shipping carbcoon:

  • class: Standard
  • service: USPS Ground Advantage
  • transit: 3-8 Days
  • type: Fixed
  • cost: $0.00
  • carrier: USPS
for models: marine, choke type: electric, type: carburetor, mounting flange type: spread bore, vintage part: yes, country of origin: united states,
category: auto parts > car truck parts accessories > air fuel delivery > carburetors, material: aluminum, sku: 10510971240327793,

Holley R840402 Is Similar To:

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2 offers $6.99–$292.50 USD
  • Offer #1: $292.50 price + $21.40 shipping estimate = $313.90* total. May need a light cleaning/freshen before use. New NOS Holley model 5200 2-barrel carburetor carb, list number 9781.+$21.40 shipping
  • Offer #2: $6.99 price + $4.50 shipping estimate = $11.49* total. Garage.+$4.50 shipping

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