Description
The Speedhut 3-3/8″ Water Temp / Fuel Level Dual Gauge (R3-DG3-LEG) seamlessly combines two essential vehicle monitoring functions into a single, stylish instrument. This gauge allows you to keep a close watch on both your engine’s water temperature and your fuel level, providing you with critical information at a glance. Its classic design ensures it complements a wide range of vehicle interiors.
KEY FEATURES AND BENEFITS:
- Dual Monitoring Capability: Allows simultaneous monitoring of water temperature and fuel level.
- Water Temperature Range: Covers 120–260°F for comprehensive engine temperature tracking.
- Fuel Level Display: Ranges from Empty to Full for accurate fuel monitoring.
- Built-in Warning Light: Provides immediate visual alerts for critical readings.
- Easy Installation: Includes necessary Speedhut temperature sensor and wiring harnesses.
- Compact Design: Fits standard 3-3/8 inch (85mm) openings.
SPECIFICATIONS:
- Gauge Type: Dual Gauge
- Combo Options: Water Temperature and Fuel Level
- Water Temperature Range: 120-260 °F
- Fuel Level Range: E-F
- Size: 3-3/8 inch (85mm)
- Hole Size: 3.33 inches (85mm)
- Warning Light: Yes
- Included: Speedhut Temperature Sensor, Wiring Harness (2-Wire Cable), Temperature Gauge Wiring Harness (2-Wire Cable), 3 ft Power & Lighting Harness
HOW TO USE:
- Mount the Gauge: Locate a suitable 3.33-inch (85mm) diameter opening in your dashboard. Secure the gauge using the provided mounting hardware.
- Connect the Temperature Sensor: Install the included Speedhut temperature sensor into your engine’s coolant passage. Attach it to the gauge using the 2-wire harness.
- Connect the Fuel Level Wiring: Connect the harness to your vehicle’s fuel level sending unit and the gauge, ensuring proper polarity and connections.
- Connect Power and Lighting: Use the 3 ft harness to connect power (red) to a 12V source, ground (black) to a suitable point, and lighting (typically orange) to the headlight circuit if desired.
- Verify Connections: Ensure all connections are secure and accurate before testing.
- Test the Gauge: Start your vehicle and check that both temperature and fuel readings appear. Confirm that the warning light works as expected.
BENEFITS OF USING THE SPEEDHUT 3-3/8″ WATER TEMP / FUEL LEVEL DUAL GAUGE (R3-DG3-LEG):
- Space Efficiency: Combines two gauges into one compact unit, saving dashboard space.
- Early Problem Detection: Monitors engine temperature to help avoid overheating and damage.
- Reliable Fuel Awareness: Prevents unexpected run-outs by showing real-time fuel levels.
- Added Safety: Integrated warning light highlights urgent issues immediately.
- Complete Kit: Comes with Speedhut sensor and harnesses for accurate readings and easy installation.
FEATURES:
- Provides simultaneous display of engine coolant temperature and fuel tank level.
- Classic 3-3/8 inch (85mm) diameter size fits common gauge openings.
- Clear and easy-to-read display with a traditional aesthetic.
- Integrated LED warning light for immediate alerts on critical conditions.
- Includes a dedicated Speedhut temperature sensor for precise temperature readings.
- Comes complete with all necessary wiring harnesses for simplified installation.
- Designed for compatibility with most standard automotive electrical systems.






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