STEWART WARNER 539-BP Boat Gauge Amplifier Ammeter 20-AMP 20AMMETER

( Brand: Stewart Warner ), ( Part Type: Gauge Amplifier ), ( Manufacturer Part Number: 539-BP ), ( Country/region Of Manufacture: United States )

Review STEWART WARNER Vintage Boat 20ammeter Gauge fits CENTURY MARINE

The Stewart Warner 539-BP Century Marine Boat 20 Amp Ammeter is a high-performance marine-grade ammeter designed to provide accurate and reliable current measurement for your boat's electrical system. This ammeter is an essential tool for monitoring the electrical consumption of various onboard systems, ensuring optimal battery health and preventing overcharging or overloading.

The 539-BP ammeter boasts a modern, sleek design with a black face and white numbers that are easy to read, even in direct sunlight. The dial features a large, red pointer that moves smoothly and accurately as the current flows through the circuit. The ammeter is also equipped with a blue backlight, which illuminates the numbers for improved visibility in low-light conditions.

This ammeter is rated for a maximum current measurement of 20 amps, making it suitable for most small to medium-sized boats. It is constructed from marine-grade materials, including a stainless steel housing and waterproof connections, ensuring durability and protection against the harsh marine environment.

The 539-BP ammeter is designed to be easy to install, with a simple two-wire connection to the battery and a shunt that can be installed in the power cable to the motor or other high-current systems. The ammeter comes with a mounting bracket and all necessary hardware for installation, making it a convenient addition to any boat's electrical system.

The Stewart Warner 539-BP Century Marine Boat 20 Amp Ammeter is an indispensable tool for boat owners who want to ensure the optimal performance and longevity of their boat's electrical systems. With its accurate measurement capabilities, modern design, and rugged marine construction, this ammeter is a smart investment for any boat owner.

Stewart Warner 539-BP Century Marine 20 Amp Ammeter: A Comprehensive Analysis

The Stewart Warner 539-BP Century Marine 20 Amp Ammeter is a popular choice among boat owners for monitoring their battery and electrical system. In this analysis, we will discuss the key features, advantages, and disadvantages of this ammeter to help you make an informed decision.

1. 20 Amp full-scale reading

2. Waterproof design for marine use

3. Backlit display for easy reading in various lighting conditions

4. Temperature compensated for accurate readings

5. Automatically switches between charging and discharging modes

1. Accurate and reliable readings: The ammeter's temperature compensation feature ensures that readings are not affected by varying temperatures.

2. Easy to read: The backlit display makes it easy to read the ammeter in various lighting conditions, ensuring that boaters can monitor their electrical systems at all times.

3. Durable design: The waterproof design makes it ideal for marine use, as it can withstand harsh environments.

1. Limited functionality: The ammeter only provides amperage readings and does not offer additional features like voltage or temperature readings.

2. Requires wiring: Installation of the ammeter involves wiring, which may require some electrical knowledge or professional assistance.

3. Size: The ammeter may be larger than some other options on the market, which could limit installation options.

The Stewart Warner 539-BP Century Marine 20 Amp Ammeter is an accurate and reliable option for boaters who require a dedicated ammeter for monitoring their electrical systems. Its waterproof design, temperature compensation, and backlit display make it an ideal choice for marine use. However, its limited functionality and the need for wiring may be disadvantages for some users. Ultimately, the decision to purchase this ammeter depends on your specific needs and preferences.

If you are a boat owner who requires a dedicated ammeter for monitoring your electrical system and value accuracy, reliability, and durability, the Stewart Warner 539-BP Century Marine 20 Amp Ammeter is an excellent choice. However, if you require additional features or prefer a smaller size, you may want to consider other options on the market.

part # 539 price

• $45.00

specifications dorycontrol:

• for models: Marine, Century
• brand: Stewart Warner
• part type: Gauge Amplifier
• manufacturer part number: 539-BP
• country/region of manufacture: United States

shipping dorycontrol:

• cost: $6.59
• carrier: USPS
• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• transit: 4-10 Days

returns dorycontrol:

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

offer dorycontrol:

• options: Ship-to-home
• started: September 9, 2025
• best offers: True
• availability: In Stock
• quantity: 1
• sold: 0

seller dorycontrol:

• rating: 99.6%
• # reviews: 630

general dorycontrol:

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

payments dorycontrol:

• credit card: Diners-club
• other
• wallet: Paypal

Stewart Warner 539 Is Similar To:

• Stewart Warner 366hm-f Performance Nylon Tubing Kit (36.4% similar) $20.00–$36.99. (March 31st, 2025)
• Stewart Warner 550-km Deluxe 3 Inch Low Speed 0-10 1/100 Mph Speedometer Gauge (52.7% similar) $154.99–$289.99. (September 5th, 2025)
• Stewart Warner 479z Vintage Boat Marine 2 Inch 12v Full Power Trim Gauge (63.4% similar) $99.95. (October 27th, 2025)