Yamaha EF2000iS Owner's Manual

Yamaha EF2000iS manual cover
Pages 48
Year 2009
Language(s)
English en

Yamaha EF2000iS Specification

The Yamaha EF2000iS is a compact, portable inverter generator designed for efficient power delivery and ease of use. It features a 79cc OHV 4-stroke engine, providing a maximum AC output of 2000 watts and a rated AC output of 1600 watts. This generator is engineered with Yamaha’s Pulse Width Modulation (PWM) technology to deliver clean, high-quality power suitable for sensitive electronic devices. Weighing approximately 44 pounds, the EF2000iS is lightweight and equipped with a practical carry handle, making it highly portable and convenient for outdoor activities or emergency use. The generator operates quietly, producing a noise level of 51.5 to 61 dBA, thanks to its advanced sound reduction system and a USFS-approved spark arrestor, ensuring it is environmentally friendly and suitable for use in noise-sensitive areas. The fuel tank capacity is 1.1 gallons, allowing for up to 10.5 hours of continuous operation at a quarter load, optimizing fuel efficiency with its Smart Throttle technology that adjusts engine speed based on load demand. The EF2000iS includes an oil watch warning system to prevent engine damage due to low oil levels, ensuring long-term reliability. It also features parallel capability, enabling two units to be connected for increased power output. The generator is equipped with a recoil start system and offers multiple power outlets, including two 120V AC outlets and a 12V DC outlet for battery charging. The Yamaha EF2000iS is designed for durability and ease of maintenance, featuring a user-friendly control panel with clear indicators for power availability and overload alerts, making it an excellent choice for both recreational and emergency power needs.

Yamaha EF2000iS F.A.Q.

How do I start the Yamaha EF2000iS generator?

To start the Yamaha EF2000iS, first ensure the generator is on a level surface and all loads are disconnected. Turn the fuel tank cap vent lever to "ON", set the engine switch to "ON", pull the choke knob out if the engine is cold, and then pull the recoil starter handle gently until you feel resistance before pulling briskly. Push the choke knob back in once the engine starts.

What type of oil is recommended for the Yamaha EF2000iS?

Yamaha recommends using SAE 10W-40 oil for the EF2000iS generator in temperatures above 32°F (0°C). For temperatures below 32°F, SAE 5W-30 is preferred. Always check the oil level and maintain it between the upper and lower marks.

How often should I change the oil in my Yamaha EF2000iS generator?

The oil in the Yamaha EF2000iS should be changed after the first 20 hours of use and every 50 hours or every 6 months thereafter, whichever comes first. Regular oil changes help ensure optimal performance and longevity of the engine.

What is the procedure to clean the air filter of the Yamaha EF2000iS?

To clean the air filter, first remove the air filter cover. Take out the foam element and wash it in soapy water. Rinse thoroughly and squeeze out excess water. Allow it to dry completely before coating it lightly with engine oil. Reinstall the foam element and air filter cover securely.

How can I troubleshoot if the Yamaha EF2000iS won't start?

If the generator won't start, check the fuel level and ensure the fuel is fresh. Verify that the engine switch is in the "ON" position and the choke is set correctly. Check the spark plug for wear or damage. Ensure the oil level is adequate and the fuel cap vent is open.

What maintenance is required for the Yamaha EF2000iS battery?

The Yamaha EF2000iS does not have a built-in battery as it is a pull-start generator. However, if using an external battery for electric start models, check the battery terminals for corrosion and ensure it is fully charged before use.

How do I store the Yamaha EF2000iS for an extended period?

For long-term storage, drain the fuel tank and carburetor to prevent fuel-related issues. Change the oil and clean the exterior. Remove the spark plug and pour a tablespoon of oil into the cylinder, then pull the recoil starter several times to distribute the oil. Store the generator in a dry, dust-free location.

Can I parallel two Yamaha EF2000iS generators?

Yes, you can connect two Yamaha EF2000iS generators in parallel using the Yamaha TwinTech Cable (available separately). This connection allows you to double the power output, making it suitable for higher power requirements.

What should I do if the generator is running but not producing electricity?

If the EF2000iS is running but not producing power, check the AC circuit breaker and ensure it is in the "ON" position. Inspect the load connections and ensure they are secure. Check for any faulty appliances connected to the generator. If the issue persists, consult a qualified technician.

How can I improve the fuel efficiency of my Yamaha EF2000iS?

To enhance fuel efficiency, use the Eco-Throttle switch, which adjusts the engine speed to match the load. Avoid overloading the generator and perform regular maintenance such as air filter cleaning and timely oil changes to ensure efficient operation.