MERCURY 840712A20 Racing Effort Control Switch 1S

( Part Type: Control Switch ), ( Manufacturer Part Number: 840712A20 ), ( Country/region Of Manufacture: United States ), ( California Prop 65 Warning: This Product May Contain Chemicals Known To The State Of California To Cause Cancer, Birth Defects, Or Other Reproductive Harm. )

Review MERCURY Racing Zero Effort Control dts 1s Trim Switch fits DTS

The Mercury 840712A20 Racing EFI Control-DTs 1S Switch is a high-performance, electronic fuel injection (EFI) control component designed specifically for racing applications. This switch, manufactured by Mercury Marine, is an essential accessory for optimizing engine performance and ensuring reliable ignition and fuel delivery.

The Mercury 840712A20 Racing EFI Control-DTs 1S Switch is a solenoid switch that offers one single-pole, double-throw (1S) circuit. It is designed to provide precise control over various engine functions, such as fuel injection, ignition, and other accessory circuits. This switch is compatible with the Mercury 450/540/600 HP EFI systems and is an upgrade from the standard OEM switch, offering enhanced functionality and improved durability.

The Mercury 840712A20 Racing EFI Control-DTs 1S Switch features a robust, marine-grade construction, ensuring it can withstand the harsh conditions of racing environments. It is made from high-quality materials, including marine-grade aluminum and corrosion-resistant coatings, to protect against saltwater, UV rays, and other environmental factors. The switch also features a waterproof design, ensuring it remains functional even when exposed to water.

The Mercury 840712A20 Racing EFI Control-DTs 1S Switch offers a user-friendly design with clear labeling for each function, making it easy to identify and control various engine systems. It also features a compact size, allowing for easy installation in limited space applications. The switch is designed to be compatible with various wiring configurations and can be easily integrated into existing engine wiring harnesses.

The Mercury 840712A20 Racing EFI Control-DTs 1S Switch offers quick and reliable operation, ensuring optimal engine performance during racing conditions. It features a fast switching time, allowing for precise control over engine functions, and can handle high current loads for demanding applications. The switch also features a built-in diagnostics function, allowing for easy troubleshooting and fault identification.

In summary, the Mercury 840712A20 Racing EFI Control-DTs 1S Switch is a high-performance, marine-grade electronic switch designed specifically for racing applications. It offers precise control over various engine functions, a robust construction, user-friendly design, and quick and reliable operation, making it an essential accessory for optimizing engine performance and ensuring reliable ignition and fuel delivery in racing environments.

The Mercury 840712A20 Racing/EFI Command-DTS 1S Switch is a digital fuel pressure regulator designed for high-performance applications. Here are some pros and cons that may help you make an informed decision about whether to purchase this product:

1. Precise Fuel Control: The Mercury 840712A20 Switch offers precise fuel control, which is essential for high-performance applications. It uses a digital fuel pressure controller to ensure consistent fuel pressure, which can help improve engine performance and fuel efficiency.

2. Easy Installation: The switch is relatively easy to install, as it replaces the traditional analog fuel pressure regulator. It also comes with a wiring harness and mounting hardware, which simplifies the installation process.

3. Wide Compatibility: This switch is compatible with a wide range of Mercury and Mariner outboard engines, making it a versatile option for boat owners.

4. Durable Design: The Mercury 840712A20 Switch is built to withstand the rigors of high-performance applications. It has a robust design, which includes a sealed connection and a corrosion-resistant coating.

1. Expensive: The Mercury 840712A20 Switch is more expensive than a traditional analog fuel pressure regulator. However, its precision fuel control and ease of installation may justify the additional cost for high-performance applications.

2. May Require Calibration: Some users have reported that the switch may require calibration to work optimally. This can add to the installation time and cost.

3. Not Suitable for All Applications: While this switch is suitable for high-performance applications, it may not be the best option for casual boaters or those with standard engines.

The Mercury 840712A20 Racing/EFI Command-DTS 1S Switch is a high-performance fuel pressure regulator that offers precise fuel control and easy installation. Its durability and wide compatibility make it a versatile option for boat owners. However, it is more expensive than a traditional analog fuel pressure regulator, and some users may need to calibrate it to work optimally.

If you are looking for a high-performance fuel pressure regulator for your boat, the Mercury 840712A20 Switch is an excellent option. Its precision fuel control and ease of installation make it a worthwhile investment for boat owners who demand the best performance from their engines. However, if you have a standard engine or a limited budget, a traditional analog fuel pressure regulator may be a more cost-effective solution.

part # 840712a20 prices

• $650.00-$1889.00

specifications dorycontrol:

• for models: Dts
• for makes: Mercury
• part type: Control Switch
• manufacturer part number: 840712A20
• country/region of manufacture: United States
• california prop 65 warning: This Product May Contain Chemicals Known To The State Of California To Cause Cancer, Birth Defects, Or Other Reproductive Harm.

general dorycontrol:

• Parts Accessories > Boat Parts > Controls Steering
• condition: New

seller dorycontrol:

• rating: 100.0%
• # reviews: 20

offer dorycontrol:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• quantity: 1
• started: August 3, 2025

payments dorycontrol:

• other
• credit card: Visa
• wallet: Apple-pay

shipping dorycontrol:

• cost: $0.00
• service: USPS Ground Advantage
• type: Calculated
• class: Standard
• transit: 4-10 Days
• carrier: USPS

returns dorycontrol:

• policy: No Returns

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