Generac GP2500i Portable Inverter Generator

1. Introduction

This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Generac GP2500i Portable Inverter Generator. Please read this manual thoroughly before operating the generator.

Figure 1: Generac GP2500i Portable Inverter Generator. This image shows the compact, orange and black design of the generator, highlighting its portability.

The Generac GP2500i inverter generator is designed to provide a portable power solution for various outdoor activities, including camping, tailgating, and as a backup power source. It delivers clean, stable power suitable for sensitive electronics.

• Portable Power Solution: Your go-to portable power source for outdoor adventures, ensuring stable power without disturbing your surroundings.
• High Quality and Consistent Power: With TruePower Technology, this generator delivers clean power that's safe for sensitive electronics, tools, and appliances.
• Compact and Lightweight: Designed for easy transportation with a built-in handle, making it a breeze to move and set up.
• Fuel-Efficient and Quiet: Economy Mode automatically adjusts engine speeds, reducing fuel consumption and noise emissions. COsense Technology provides powerful protection against hazardous carbon monoxide.
• Smart and Reliable: Equipped with LED indicators for low oil, overloaded, and ready-to-use. Features a USB port for device charging, and parallel-ready capability for doubling your power output.

Figure 2: The Generac GP2500i providing portable power for various activities such as tailgating, hunting, DIY projects, and during power outages. This image illustrates the versatility of the generator in different outdoor scenarios.

2. Safety Information

WARNING: Read and understand all safety precautions before operating this generator. Failure to follow these instructions can result in serious injury or death.

• Carbon Monoxide Hazard: Generators produce carbon monoxide, an odorless, colorless, poisonous gas. Operate generators outdoors only, far away from windows, doors, and vents.
• Electrical Shock Hazard: Do not operate the generator in wet conditions. Ensure all electrical connections are dry and secure.
• Fire Hazard: Fuel is highly flammable. Do not refuel while the engine is running or hot. Store fuel in approved containers in a well-ventilated area.
• Hot Surfaces: The generator's engine and muffler become very hot during operation and remain hot for some time after shutdown. Avoid contact.
• COsense Technology: This generator is equipped with COsense Technology, which automatically shuts down the generator if hazardous levels of carbon monoxide are detected. Do not disable or bypass this safety feature.

3. Setup and Assembly

3.1 Unpacking

Carefully remove the generator and all components from the packaging. Verify that all items listed in the packing list are present and undamaged. Retain packaging for future storage or transport.

3.2 Adding Engine Oil

The generator is shipped without engine oil. Before first use, add the recommended type and amount of oil. Refer to the engine oil specifications section for details.

1. Place the generator on a level surface.
2. Locate the oil fill cap/dipstick.
3. Remove the cap and slowly pour the recommended oil into the engine until it reaches the full mark on the dipstick. Do not overfill.
4. Securely replace the oil fill cap.

3.3 Adding Fuel

Use only fresh, unleaded gasoline with an octane rating of 87 or higher. Do not use E85 or any other fuel containing more than 10% ethanol.

1. Ensure the generator is turned off and cool.
2. Open the fuel cap.
3. Slowly add gasoline to the fuel tank, being careful not to overfill. Leave space for fuel expansion.
4. Securely replace the fuel cap.

Figure 3: Guidance on calculating power needs. This diagram helps users determine the right generator size by showing typical wattage for common appliances like coffee makers, TVs, lights, slow cookers, blenders, and cell phones.

4. Operating Instructions

4.1 Starting the Generator

1. Place the generator on a firm, level surface outdoors, away from any structures or vents.
2. Ensure the fuel valve is in the "ON" position.
3. Move the choke lever to the "CHOKE" position (if engine is cold).
4. Turn the engine switch to the "ON" position.
5. Pull the recoil starter handle firmly until the engine starts.
6. Once the engine starts, slowly move the choke lever to the "RUN" position.

4.2 Connecting Electrical Devices

Once the generator is running smoothly, you can connect your electrical devices. Ensure the total wattage of connected devices does not exceed the generator's running wattage.

• Plug devices directly into the generator's outlets.
• For sensitive electronics, ensure the generator is in "Economy Mode" if available, or that the TruePower Technology is active for clean power.
• Do not overload the generator. Overload indicators will illuminate if the generator is overloaded.

Figure 4: Key features of the GP2500i. This image points out the quiet operation due to its fully enclosed design, the inclusion of USB ports for charging mobile devices, and its parallel-ready capability for connecting two units for increased power output (parallel kit sold separately).

4.3 Stopping the Generator

1. Disconnect all electrical devices from the generator.
2. Turn the engine switch to the "OFF" position.
3. Turn the fuel valve to the "OFF" position.

5. Maintenance

Regular maintenance is crucial for the longevity and optimal performance of your generator. Always ensure the generator is off and cool before performing any maintenance.

5.1 Engine Oil Check/Change

• Check oil level before each use.
• Change oil after the first 20 hours of operation, then every 100 hours or annually, whichever comes first.

5.2 Air Filter Cleaning

• Inspect the air filter every 50 hours or monthly.
• Clean or replace if dirty.

5.3 Spark Plug Inspection

• Inspect the spark plug every 100 hours or annually.
• Clean or replace if necessary.

5.4 Storage

For extended storage, drain the fuel tank and carburetor, or add a fuel stabilizer. Store the generator in a clean, dry place.

6. Troubleshooting

7. Specifications

Figure 5: Dimensions and power ratings of the Generac GP2500i. This image shows the generator's length (19.7"), width (11.4"), and height (17.9"), along with its starting wattage (2500W), running wattage (2200W), and weight (48 lbs).

• Model: GP2500i (8251)
• Starting Wattage: 2500 Watts
• Running Wattage: 2200 Watts
• Fuel Type: Gasoline
• Tank Volume: 1 Gallon
• Runtime: 8 hours (at 25% load)
• Engine Type: 4 Stroke
• Engine Displacement: 98 Cubic Centimeters
• Voltage: 120 Volts
• Frequency: 60 Hz
• Item Weight: 56 Pounds
• Product Dimensions (L x W x H): 19.7" x 11.4" x 17.9"
• Special Features: CO Sensor (COsense Technology), Portable, USB Port, Parallel-Ready

Figure 6: Comprehensive table for calculating power needs. This table lists common devices and their typical running and additional starting watts, helping users determine the total wattage required for their applications.

8. Warranty and Support

Generac products are backed by a manufacturer's warranty. For specific warranty details, please refer to the warranty card included with your product or visit the official Generac website.

For customer support, technical assistance, or to inquire about protection plans, please contact Generac customer service or visit their official support channels. Protection plans are available for purchase to extend coverage beyond the standard warranty.

You can find more information and support at the Generac Store on Amazon.