Ryobi 770rEB manual Carburetor Adjustment

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MAINTENANCE AND REPAIR INSTRUCTIONS

5.Squeeze the filter to spread and remove excess oil (Fig. 37).

Fig. 37

6.Replace the air filter in the air filter/muffler cover (Fig. 34).

NOTE: Operating the unit without the air filter and air filter/muffler cover assembly, will VOID the warranty.

Reinstalling the Air filter/Muffler Cover

1.Place the air filter/muffler cover over the back of the carburetor and muffler.

NOTE: The choke lever must be in the PARTIAL choke position (B) (Fig. 33) to install the air filter/muffler cover.

2.Insert the four (4) screws into the holes in the air filter/muffler cover (Fig. 33) and tighten.

Do not over tighten.

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable through the Air filter/Muffler cover (Fig. 38).

NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make carburetor adjustments.

Check Fuel Mixture

Old and/or improperly mixed fuel is usually the reason for the unit not running properly. Drain and refill the tank with fresh, properly mixed fuel prior to making any adjustments. Refer to Oil and Fuel Information Pg. 11.

Clean Air Filter

The condition of the air filter is important to the operation of the unit. A dirty air filter will restrict air flow and change the air/fuel mixture. This is often mistaken for an out of adjustment carburetor. Check the condition of the air filter before adjusting the idle speed screw. Refer to Air Filter Maintenance Pg. 20.

Adjust Idle Speed Screw

WARNING: The cutting attachment may be spinning during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious person- al injury.

If after checking the fuel mixture and cleaning the

air filter the engine still will not idle, adjust the idle speed screw as follows.

1.Start the engine and let it run at a high idle for a minute to warm up. See Starting/Stopping Instructions, Pg. 12.

2.Release the throttle trigger and let the engine idle. If the engine stops, insert a small phillips or flat blade screwdriver into the hole in the air filter/muffler cover (Fig. 38). Turn the idle speed screw in, clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly.

Idle Speed Screw

Fig. 38

NOTE: The cutting attachment should not rotate when the engine idles.

3.If the cutting attachment rotates when the engine idles, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.

Checking the fuel mixture, cleaning the air filter, and adjusting the idle speed screw should solve most engine problems.

If not and:

•The engine will not idle,

•The engine hesitates or stalls on acceleration,

•There is a loss of engine power,

have the carburetor adjusted by an authorized service dealer.

WARNING: When the unit is turned off make sure the cutting attachment has stopped before the unit is set down to prevent serious personal injury.

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Contents OPERATOR’S Manual Introduction Table of ContentsSpark Arrestor California Emission RegulationsRules for Safe Operation Arrestor KitSafety Warnings for GAS Trimmers Before OperatingWhile Operating Other Safety Warnings While Operating with SWEEPER/BLOWER ADD-ONWhile Operating with Edger ADD-ON Symbolmeaning Safety Alert Symbol Safety and International SymbolsFor Service INFORMATION, Call Unleaded FuelSharp Blade Symbolmeaning HOT Surface WarningIndicates OIL Choke ControlApplications As a trimmerCutting grass and light weeds Installing and Adjusting the J-HANDLE Assembly InstructionsInstalling the Cutting Attachment Shield Using Fuel Additives Using Blended FuelsOIL and Fuel Information OIL and Fuel Mixing InstructionsSTARTING/STOPPING Instructions Starting InstructionsStopping Instructions Operating Instructions Installing the Cutting Attachment or Add-OnsOperating the CLICK-LINK System Removing the Cutting Attachment or Add-OnsAdjusting Trimming Line Length Holding the TrimmerTips for Best Trimming Results Decorative Trimming Adjusting Edger Cutting DepthHolding the Unit with Edger ADD-ON Tips for Best Edging ResultsHolding the Unit with SWEEPER/BLOWER ADD-ON Operating Tips When Using SWEEPER/BLOWERMaintenance Schedule Maintenance and Repair InstructionsLine Installation There are two methods to replace the trimming lineIndexing Teeth Edger Blade Replacement Installing a Prewound ReelAIR Filter Maintenance Cleaning the Air FilterRemoving the Air Filter/Muffler Cover Carburetor Adjustment ACCESSORIES/REPLACEMENT Parts Replacing the Spark Plug110-120 in.lb .3-13.5 Nm. Do not over tighten Cleaning Cleaning and StorageStorage Long Term StorageTroubleshooting U S ET I O N Engine SpecificationsPage Manufacturers Warranty Coverage Owners Warranty Responsibilities12/98 REV. a

770rEB specifications

The Ryobi 770rEB is a powerful and versatile brushcutter designed for both homeowners and professionals seeking an efficient tool to manage heavy vegetation and tough landscaping tasks. This model combines advanced technology with practicality to deliver impressive performance in various gardening applications.

At the heart of the Ryobi 770rEB is its robust 770W engine, which provides ample power for tackling dense undergrowth, thick grass, and challenging weeds. Its ergonomic design, coupled with a lightweight construction, ensures user comfort during extended periods of operation. The balance and handling of this brushcutter make it easy to maneuver, reducing fatigue and increasing productivity.

One of the standout features of the Ryobi 770rEB is its Easy Start technology. This innovation allows for a simplified starting process, so users can get to work without the frustration often associated with traditional pull-start engines. Additionally, the engine is designed with reduced vibrations, which minimizes strain on the operator’s hands and arms, enhancing overall comfort and control.

The cutting performance of the Ryobi 770rEB is further enhanced by its dual-line bump feed head, which allows for quick and easy line replacement. Users can effortlessly advance the cutting line simply by tapping the head on the ground, making it a user-friendly solution for maintaining a neat and tidy landscape. The 25.4cc 2-stroke engine offers high efficiency while keeping emissions low, adhering to environmental standards.

Moreover, the Ryobi 770rEB comes equipped with several cutting attachments, including blades for heavier brush and trees, providing adaptability for a variety of tasks. The inclusion of a shoulder harness enhances stability and adds comfort, allowing the user to distribute weight evenly during operation.

Building on durability, the Ryobi 770rEB features a sturdy construction that can withstand the trials of regular use. Its adaptable design ensures it meets the needs of various landscaping tasks, from trimming grass around flower beds to clearing overgrown areas.

In summary, the Ryobi 770rEB brushcutter stands out due to its powerful engine, ergonomic features, Easy Start technology, and versatility in handling different cutting tasks. Whether for home use or professional landscaping, it proves to be an essential tool for maintaining efficient and effective outdoor spaces.
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