Ryobi 990r manual Troubleshooting, Problem Cause Action

Page 26

TROUBLESHOOTING

PROBLEM

CAUSE

ACTION

 

 

 

Engine Is Difficult to

Ignition switch is “STOP (O)"

Turn switch to “RUN (I)”

Start or Will Not Start

 

 

 

Primer bulb wasn’t pushed enough

Press primer bulb fully and slowly 5-7 times

 

Engine is not choked

Use starting procedure, USING

 

 

"FULL" CHOKE" (Page 9)

 

Empty fuel tank

Fill fuel tank

 

Engine flooded

Use starting procedure, USING

 

 

"PARTIAL" CHOKE (Page 9)

 

Valve clearance is out of

Use adjust valve to rocker arm

 

adjustment

clearance procedure (Pages 18 and 19)

 

Plugged spark arrester screen

Clean or replace spark arrester screen (Page 19)

 

Spark plug fouled

Clean spark plug and regap or replace

 

 

 

Engine Will Not Idle

Air filter is plugged

Clean and re-oil air filter or replace (Page 15)

 

Carburetor misadjusted

Adjust carburetor (Pages 16-17)

 

 

 

Engine Will Not Accelerate

Carburetor misadjusted

Adjust carburetor (Pages 16-17)

 

 

 

Engine Lacks Power or Stalls

Dirty air filter

Clean and re-oil air filter or replace (Page 15)

When Cutting

 

 

 

Valve clearance is out of

Use adjust valve to rocker arm

 

adjustment

clearance procedure (Pages 18-19)

 

Dirty spark arrestor screen

Clean or replace screen

 

Carburetor misadjusted

Adjust carburetor (Pages 16-17)

 

Not enough fuel in fuel tank

Fill fuel tank

 

 

 

Cutting Head Will Not Advance

Cutting head out of line

Refill with new cutting line (Pages 13-14)

Line

 

 

 

Inner reel bound up

Replace inner reel (Pages 13-14)

 

Cutting head dirty

Clean inner reel and outer spool (Pages 13-14)

 

Indexing teeth worn or burred

Replace inner reel and outer spool

 

 

(Pages 13-14)

 

Line welded

Disassemble cutting head, remove the welded

 

 

section and rewind the line

 

Line twisted when refilled

Disassemble cutting head and rewind reel

 

Not enough line is exposed

Push the Bump Knob and pull out the line until

 

 

a minimum of 102 mm (4 in) is outside of the

 

 

cutting head

 

 

 

Starter Rope Is Difficult to Pull

Oil accumulated in combustion

Remove the spark plug

or Engine Locks

chamber

 

 

Unit operated with low or no oil

Drain the oil from the spark plug hole

 

 

Pull the starter rope several times to remove

 

 

any excess oil from the cylinder

 

 

Clean the spark plug and wipe off excess oil

 

 

with a dry cloth

 

 

Reinstall the spark plug

 

 

Check oil before starting

 

 

 

If further assistance is required, contact your local authorized service dealer or call 1-800-345-8746.

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Contents 990r Introduction Table of Contents Fuel and PRE-OPERATIONAL Safety WarningsCalifornia Emission Regulations Saftey Warnings for Brush Blade During USE Other Safety WarningsOperational After USESafety and International Symbols SymbolBrushcutter Safety Installing the Shoulder Strap Assembly InstructionsAdjusting the J-HANDLE Installing the Brush Blade Mark Installing the Line SpoolBlade Locating Removing the Lower Attachment Boom Installing the Lower Attachment BoomOperating Split Boom Coupler Adding OIL to Crankcase Initial USE OIL & Fuel InformationRecommended OIL Type Checking the OILDefinition of Blended Fuels Changing the OILRecommended Fuel Type USE of Blended FuelsPosition STARTING/STOPPING InstructionsThrottle Trigger RopeOperating Instructions Adjusting the Trimming Line LengthUsing the Brush Blade Decorative TrimmingMaintenance and Repair Instructions Maintenance Schedule Frequency Maintenance Required Refer toRemoving the Existing Reel Rewinding the Existing ReelCorrect Line to Use Bump Knob Inner ReelWinding the Existing Reel Reinstalling the ReelInstalling a Prewound Reel Gear Housing Service Fill PlugAir Filter AIR Filter MaintenanceScrew Screws Choke LeverAir Filter Maintenance Carburetor AdjustmentAdjusting the Carburetor Final High Speed Mixture Needle AdjustmentRemoving Muffler INSPECTING/CLEANING the MufflerLean Adjust to Midpoint Rich Checking Spark Arrester Screen Inspection and CleaningMuffler Reassembly Torque the screw to 15-20 inlb 1.7-2.2 NmScrew Screws Checking / Adjusting Valve to Rocker ARM ClearanceReplacing the Spark Plug Adjusting Nuts Rocker Arm Valve Flat Feeler GaugeCold Torque Specifications Cleaning and StorageSpecifications EngineTroubleshooting Problem Cause ActionCalifornia Emission Control Warranty Statement Your Warranty Rights and ObligationsLimited Two-Year Warranty

990r specifications

The Ryobi 990R is a powerful and versatile cordless tool that has gained popularity among both DIY enthusiasts and professional users alike. Designed to offer convenience and efficiency, this innovative unit is equipped with a range of features that cater to different applications.

One of the standout characteristics of the Ryobi 990R is its powerful motor. With a robust design, it delivers ample torque and speed, enabling users to tackle a variety of tasks, from cutting through tough materials to drilling precise holes. The motor is powered by a high-capacity lithium-ion battery, which is known for its longevity and quick recharge time. This ensures that users can work longer without frequent interruptions, making the 990R an ideal choice for demanding projects.

Another notable feature of the Ryobi 990R is its ergonomic design. Lightweight and easy to maneuver, the unit minimizes user fatigue, especially during extended use. The integrated rubber grip offers enhanced comfort and control, allowing for greater precision when working on intricate tasks. This commitment to user comfort makes it suitable for both novice and experienced users.

The 990R also incorporates advanced technology that enhances its performance. The unit features variable speed settings, allowing users to adjust the tool’s speed according to the task at hand, whether it’s a delicate job or a high-powered application. Additionally, the tool is equipped with a built-in LED light that illuminates the work area, ensuring visibility in dimly lit spaces and improving overall accuracy.

For added versatility, the Ryobi 990R is compatible with a wide range of attachments and accessories. This allows users to customize the tool according to their specific needs, whether they require a drill, sander, or impact driver. The quick-change chuck system further enhances efficiency, enabling users to switch between accessories in seconds.

Durability is another defining characteristic of the Ryobi 990R. Constructed with high-grade materials, it is designed to withstand demanding working conditions without compromising performance. This resilience is crucial for professionals who rely on their tools for everyday use.

In summary, the Ryobi 990R stands out in the crowded tool market due to its powerful motor, ergonomic design, advanced technologies, and durability. Whether for home improvement projects or professional applications, it offers reliability and performance that users can trust. As Ryobi continues to innovate, the 990R remains a solid choice for anyone looking to enhance their toolkit.
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