Introduction
This user manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your ECHO PB-770T Backpack Blower. The PB-770T is a commercial-grade gas-powered leaf blower designed for powerful and efficient outdoor cleanup tasks. It features a 63.3 cc engine, delivering 756 CFM (Cubic Feet Per Minute) and air speeds up to 234 MPH (Miles Per Hour).
Key features include a side-mounted, heavy-duty, dual-stage air filtration system for extended engine life, and a tube-mounted throttle with cruise control for convenient operation. The backpack design incorporates padded shoulder straps and a ventilated back pad for user comfort during prolonged use.
Safety Information
WARNING: Read and understand all safety instructions before operating this product. Failure to follow these instructions may result in serious injury.
- Always wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, and sturdy footwear.
- Keep bystanders, especially children and pets, at least 50 feet (15 meters) away from the operating area.
- Operate the blower only in well-ventilated areas.
- Do not operate the blower if you are fatigued, ill, or under the influence of alcohol or drugs.
- Inspect the blower before each use for loose fasteners, damaged parts, or fuel leaks. Do not operate if damaged.
- This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.
Setup
1. Unpacking and Assembly
Carefully remove all components from the packaging. Ensure all parts are present and undamaged. The PB-770T typically comes with the main unit, blower tubes, and a flexible hose. Attach the flexible hose to the blower outlet and secure it with the provided clamps. Connect the blower tubes to the flexible hose and the handle assembly. Ensure all connections are tight and secure.
2. Fueling the Blower
The ECHO PB-770T uses a gasoline-engine and requires a specific fuel mixture. Refer to the engine manufacturer's instructions for the correct gasoline-to-oil ratio. Use fresh, clean, unleaded gasoline with an octane rating of 89 or higher. Use a high-quality 2-stroke engine oil specifically designed for air-cooled engines.
- Locate the fuel tank cap (red) on the side of the blower.
- Clean the area around the fuel cap to prevent dirt from entering the tank.
- Slowly remove the fuel cap.
- Carefully pour the pre-mixed fuel into the tank, avoiding overfilling. The fuel tank holds approximately 0.5 gallons.
- Securely replace the fuel cap.
The fuel tank of the ECHO PB-770T, visible on the lower left side of the blower, with a red cap indicating the fill point.
Operating Instructions
1. Starting the Blower
- Place the blower on a flat, stable surface.
- Engage the choke lever (usually a red lever near the engine).
- Press the primer bulb several times until fuel is visible in the clear return line.
- Pull the starter rope firmly and smoothly until the engine attempts to start (usually 1-3 pulls).
- Once the engine "pops" or attempts to start, disengage the choke lever.
- Pull the starter rope again until the engine starts and runs smoothly.
- Allow the engine to warm up for a few moments before engaging the throttle.
2. Using the Blower
The PB-770T features a tube-mounted throttle with a cruise control function. This allows you to adjust and maintain desired air speeds without continuously holding the trigger.
- Strap the backpack blower onto your back, ensuring the padded straps are comfortable and secure.
- Hold the blower tube firmly with both hands.
- Squeeze the throttle trigger to increase air speed.
- To engage cruise control, set the desired throttle speed and then activate the cruise control lever/button (refer to specific control layout on your unit).
- Direct the airflow to move leaves, grass clippings, and other debris. The powerful airflow (756 CFM, 234 MPH) is effective for large areas and stubborn debris.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your ECHO PB-770T.
1. Air Filter Maintenance
The PB-770T is equipped with a side-mounted, heavy-duty, dual-stage air filtration system. Regularly inspect and clean the air filter to prevent dust and debris from entering the engine, which can prolong engine life.
- Locate the air filter cover on the side of the engine.
- Unscrew or unclip the cover to access the air filter element.
- Remove the air filter. Clean it by tapping it gently or using compressed air. If heavily soiled or damaged, replace it with a genuine ECHO replacement filter.
- Reinstall the clean or new air filter and secure the cover.
The side of the ECHO PB-770T engine where the air filter is located, typically behind a removable cover.
2. Spark Plug Inspection
Check the spark plug periodically for wear, carbon buildup, or incorrect gap. Replace if necessary.
3. General Cleaning and Inspection
- Keep the exterior of the blower clean, especially cooling fins and air intake areas.
- Inspect the blower tubes and flexible hose for cracks or damage.
- Check the backpack straps and harness for wear and tear. Replacement straps are available if needed.
- Ensure all nuts, bolts, and screws are tightened securely.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel, incorrect choke setting, fouled spark plug, clogged fuel filter, old fuel. | Check fuel level and mixture. Adjust choke. Clean or replace spark plug. Clean or replace fuel filter. Use fresh fuel. |
| Loss of power during operation | Clogged air filter, incorrect fuel mixture, worn spark plug, carburetor issue. | Clean or replace air filter. Verify fuel mixture. Inspect/replace spark plug. Consult service center for carburetor issues. |
| Excessive vibration | Loose components, damaged fan/impeller. | Check and tighten all fasteners. Inspect fan/impeller for damage; replace if necessary. |
If you encounter issues not listed here or if solutions do not resolve the problem, contact an authorized ECHO service center.
Specifications
| Feature | Specification |
|---|---|
| Brand | ECHO |
| Model | PB-770T |
| Power Source | Gasoline-Engine |
| Engine Displacement | 63.3 cc |
| Air Flow Capacity | 756 Cubic Feet Per Minute (CFM) |
| Air Speed | 234 Miles per Hour (MPH) |
| Noise Level | 73 dB |
| Item Weight | 0.01 Ounces (Note: This weight seems incorrect from source data, typically blowers are much heavier) |
| Product Dimensions | 22.1"L x 15.5"W x 20.4"H |
| Form Factor | Backpack |
Warranty and Support
The ECHO PB-770T Backpack Blower typically comes with a 5-year consumer warranty. For specific warranty terms and conditions, please refer to the documentation included with your product or visit the official ECHO website.
Replacement parts, such as straps and cables, are available to maintain your blower over its lifespan. For genuine ECHO parts and accessories, visit the ECHO Store on Amazon or contact an authorized dealer.
For technical support or service inquiries, please contact ECHO customer service or an authorized service center.
