Ryobi 780r Replacing the Spark Plug, ACCESSORIES/REPLACEMENT Parts, 110-120 in.lb .3-13.5 Nm, 020

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MAINTENANCE AND REPAIR INSTRUCTIONS

REPLACING THE SPARK PLUG

Use a Champion RDJ7Y spark plug

(or equivalent). The correct air gap is 0.020 in. (0.5 mm.). Remove the plug after every 50 hours of operation and check its condition.

1.Stop the engine and allow it to cool. Grasp the plug wire firmly and pull the cap from the spark plug.

2.Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 in. socket counterclockwise.

3.Replace cracked, fouled or dirty spark plug. Set the air gap at 0.020 in. (0.5 mm.) using a feeler gauge (Fig. 42).

CAUTION: Do not sand blast, scrape, or clean electrodes. Grit in the engine could damage the cylinder.

4.Install a correctly gaped spark plug in the cylinder head. Tighten by turning the 5/8 in. socket clockwise until snug.

If using a torque wrench torque to;

110-120 in.•lb. (12.3-13.5 N•m).

Do not over tighten.

ACCESSORIES/REPLACEMENT PARTS

2-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . 147543

Spark Plug . . . . . . . . . . . . . . . . . . . . . . 610311

Replacement Line . . . . . . . . . . . . . . . . 612454

Replacement Line Cartridge . . . . . . . . . 147345

Inner Reel Spring . . . . . . . . . . . . . . . . . 610636

Bump Head Knob Assembly . . . . . . . . 180814

Outer Spool . . . . . . . . . . . . . . . . . . . . .147494

Cutting Attachment Head Assembly . . .147498

Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . 180000

Shoulder Harness . . . . . . . . . . . . . . . . 682075

Cutting Blade . . . . . . . . . . . . . . . . . . . . 145873

Blade Retaining Kit . . . . . . . . . . . . . . . .180014

0.020 in.

(0.5 mm.)

Fig. 42

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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 For Service INFORMATION, Call Safety and International SymbolsSymbol Meaning Safety Alert Symbol Unleaded FuelBrushcutters Replace dull blade TRIMMER/BRUSHCUTTER SafetyHOT Surface Warning Choke ControlFuel Cap Know Your UnitApplications Starter RopeHandle Screws Top Clamp Middle Clamp Bottom Clamp Nuts Assembly InstructionsInstalling and Adjusting the J-HANDLE DecalInstalling the Harness Removing and Installing Cutting Attachment ShieldRemove the Cutting Attachment Install the Cutting BladeRemove the Cutting Attachment Shield Counterclockwise 1/2 turn CounterclockwiseRemove the Cutting Blade Remove the Cutting Blade and Install the Cutting AttachmentInstall the Cutting Attachment ClockwiseOIL and Fuel Information Using Blended FuelsUsing Fuel Additives OIL and Fuel Mixing InstructionsPartial Choke Position B Full Choke Run STARTING/STOPPING InstructionsOn/Off Stop Control Choke Lever Primer BulbOperating the CLICK-LINK Installing the Cutting Attachment or Add-OnsOperating Instructions System Model 790rHolding the Trimmer Adjusting Trimming Line Length Each time the head is bumped, about 1Cutting Blade Operating Tips Tips for Best Trimming Results Using the Cutting BladeDecorative Trimming Frequency Maintenance Required Refer to Maintenance and Repair InstructionsMaintenance Schedule Outer Spool Spring Inner Reel Bump Knob Line InstallationWinding the Existing Inner Reel Indexing TeethHolding Slots Removing the Air Filter/Muffler Cover Installing a Prewound ReelAIR Filter Maintenance Choke Lever Partial Choke Position B ScrewsAir Filter Cleaning the Air FilterReinstalling the Air Filter/Muffler Cover Adjust Idle Speed Screw Carburetor AdjustmentClean Air Filter Check Fuel Mixture110-120 in.lb .3-13.5 Nm ACCESSORIES/REPLACEMENT PartsReplacing the Spark Plug 020Storage Cleaning and StorageCleaning Long Term StorageTroubleshooting Problem Cause ActionDrive Shaft & Cutting Attachment SpecificationsEngine 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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