Ryobi Comprehensive Guide to Trimmer Assembly for 780R Model
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ASSEMBLY INSTRUCTIONS

REMOVING THE CUTTING ATTACHMENT AND INSTALLING THE CUTTING BLADE

NOTE: To make removing or installing the cutting blade or cutting attachment easier, place the unit on the ground or on a work bench.

Remove the Cutting Attachment Shield

See Removing and Installing Cutting Attachment Shield, Pg. 11.

Remove the Cutting Attachment

WARNING: The gear housing gets hot with use and can result in injury to the operator. When the unit is turned off it remains hot for a short time. Do not touch the gear housing until it has cooled.

1.Align the shaft bushing hole with the locking rod slot and insert the locking rod into the shaft bushing hole (Fig. 8).

Output Shaft

Output Shaft

Bushing

Locking Rod

Locking

Shaft Bushing

Rod Slot

Hole

Fig. 8

2.While holding the locking rod, remove the cutting attachment by turning it clockwise off of the output shaft (Fig. 9). Store the cutting attachment for future use.

Cutting Attachment

Locking Rod

Locking Rod Slot

Fig. 9

Install the Cutting Blade

WARNING: To avoid serious personal injury, always wear gloves while handling or installing the blade.

3.Place the cutting blade on the output shaft (Fig. 10).

Blade Retainer

Nut

 

Blade Cover

 

Pilot Hole

Cutting

Blade

Output Shaft

Locking Rod

Guard Mount

Fig. 10

4.Center the cutting blade on the pilot step of the output shaft bushing (Fig. 11).

Output Shaft

Pilot Step

Output Shaft

Bushing

Fig. 11

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Contents OPERATOR’S Manual Table of Contents IntroductionCalifornia Emission Regulations Spark ArrestorSymbol Meaning Rules for Safe OperationWhile Operating While Operating with Cutting Blade Safety and International Symbols Symbol Meaning Safety Alert SymbolFor Service INFORMATION, Call Unleaded FuelTRIMMER/BRUSHCUTTER Safety HOT Surface WarningBrushcutters Replace dull blade Choke ControlKnow Your Unit ApplicationsFuel Cap Starter RopeAssembly Instructions Installing and Adjusting the J-HANDLEHandle Screws Top Clamp Middle Clamp Bottom Clamp Nuts DecalInstalling the Harness Removing and Installing Cutting Attachment ShieldInstall the Cutting Blade Remove the Cutting Attachment ShieldRemove the Cutting Attachment Counterclockwise 1/2 turn CounterclockwiseRemove the Cutting Blade and Install the Cutting Attachment Install the Cutting AttachmentRemove the Cutting Blade ClockwiseUsing Blended Fuels Using Fuel AdditivesOIL and Fuel Information OIL and Fuel Mixing InstructionsSTARTING/STOPPING Instructions On/Off Stop ControlPartial Choke Position B Full Choke Run Choke Lever Primer BulbInstalling the Cutting Attachment or Add-Ons Operating InstructionsOperating the CLICK-LINK System Model 790rHolding the Trimmer Adjusting Trimming Line Length Each time the head is bumped, about 1Tips for Best Trimming Results Using the Cutting Blade Decorative TrimmingCutting Blade Operating Tips Maintenance and Repair Instructions Maintenance ScheduleFrequency Maintenance Required Refer to Line Installation Winding the Existing Inner ReelOuter Spool Spring Inner Reel Bump Knob Indexing TeethHolding Slots Installing a Prewound Reel AIR Filter MaintenanceRemoving the Air Filter/Muffler Cover Choke Lever Partial Choke Position B ScrewsCleaning the Air Filter Reinstalling the Air Filter/Muffler CoverAir Filter Carburetor Adjustment Clean Air FilterAdjust Idle Speed Screw Check Fuel MixtureACCESSORIES/REPLACEMENT Parts Replacing the Spark Plug110-120 in.lb .3-13.5 Nm 020Cleaning and Storage CleaningStorage Long Term StorageTroubleshooting Problem Cause ActionSpecifications EngineDrive Shaft & Cutting Attachment Page Owners Warranty Responsibilities Ryobi Outdoor Products Ryobi Canada INC

780r specifications

The Ryobi 780R is a powerful and reliable gas-powered string trimmer known for its exceptional performance and user-friendly features. Designed for both professionals and homeowners, this tool offers versatility and efficiency for tackling tough trimming jobs around the yard.

One of the standout features of the Ryobi 780R is its robust 30cc 2-cycle engine. This engine provides ample power to handle thick weeds and overgrown grass, ensuring a clean and precise cut with every pass. The lightweight design of the trimmer enhances maneuverability, making it easy to navigate around obstacles such as trees, flower beds, and garden furniture.

The trimmer is equipped with a premium 18-inch cutting swath, allowing for a wider range to be covered in a single pass. This feature can significantly reduce the time required to complete larger trimming tasks. Additionally, the variable speed throttle gives users the flexibility to adjust the cutting power based on the density of the vegetation, offering greater control.

One of the notable technologies in the Ryobi 780R is its Easy Start technology, which simplifies the starting process, reducing the effort required to get the engine running. This is particularly beneficial for users who may struggle with traditional pull-start mechanisms. The trimmer also features an automatic choke system, ensuring optimal engine performance in various conditions.

Another important characteristic is its dual-line feed system. The Ryobi 780R uses a bump head for easy line advancement; simply bump the head on the ground to extend the line as needed. This functionality minimizes downtime and allows users to focus on the task at hand. The dual-line setup also enhances cutting efficiency, making it a great choice for tougher vegetation.

In terms of comfort, the Ryobi 780R incorporates ergonomic handle designs that reduce user fatigue during extended use. The adjustable shaft allows for personalized length settings, catering to users of varying heights, further enhancing comfort and control. With built-in safety features such as a protective shield, users can operate the trimmer with peace of mind.

The Ryobi 780R is not just a powerful trimmer but also a thoughtfully designed tool that combines performance with user convenience. Whether you are maintaining a small garden or handling larger landscaping tasks, this trimmer offers the reliability and efficiency needed to achieve a well-kept lawn. Its blend of innovation and practical features makes it a favored choice among gardening enthusiasts and professionals alike.
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