Ryobi RY39500 - User Manual

Other manuals for Ryobi RY39500

Replacement Parts List4 pages

Repair Sheet7 pages

Questions and Answers

J
John CruzJul 26, 2025
Why Ryobi Trimmer engine will not start?
- J
  Jacqueline WallaceJul 26, 2025
  If your Ryobi Trimmer engine won't start, it could be due to no spark, no fuel, or a flooded engine. Try cleaning or replacing the spark plug and resetting the spark plug gap. Push the primer bulb until it's full of fuel; if it doesn't fill, the primary fuel delivery system might be blocked, and you should contact a servicing dealer. If the primer bulb fills, the engine may be flooded. Pull the starter three times with the choke lever at 'RUN'. If it still doesn't start, move the choke lever to 'START' and repeat the normal starting procedure. If it still fails, repeat the procedure with a new spark plug and if the problem persists, contact a servicing dealer.
D
dylanmorrisAug 1, 2025
What to do if Ryobi RY39500 Trimmer engine emits smoke and does not reach full speed?
- S
  suzannerobertsAug 1, 2025
  If your Ryobi Trimmer engine doesn't reach full speed and emits excessive smoke, check the lubricant fuel mixture, and inspect the air filter and spark arrestor screens for dirt. Use fresh fuel and the correct 2-cycle lubricant mix. Clean the air filter screen, and if the issue continues, contact a servicing dealer.
M
melissa74Aug 6, 2025
What to do if Ryobi RY39500 Trimmer engine starts but will not accelerate?
- J
  Jamie JimenezAug 6, 2025
  If your Ryobi Trimmer engine starts but won't accelerate, allow the engine to completely warm up for approximately three minutes. If the engine still does not accelerate after three minutes, contact a servicing dealer.
D
Darius HamptonAug 13, 2025
How to fix Ryobi RY39500 Trimmer when it starts and runs but will not idle?
- A
  alexanderevansAug 13, 2025
  If the Ryobi Trimmer engine starts, runs, and accelerates but will not idle, the idle speed screw on the carburetor may need adjustment. Turn the idle speed screw clockwise to increase the idle speed. The blades should not move at idle.
T
tylerjohnsonAug 18, 2025
Why Ryobi Trimmer engine starts but only runs at high speed at half choke?
- L
  Lisa SuarezAug 18, 2025
  If the Ryobi Trimmer engine starts but will only run at high speed at half choke, the carburetor likely requires adjustment. Contact a servicing dealer.

Summary

Introduction to the Hedge Trimmer

General Safety Rules for Hedge Trimmer Operation

Safe Operation and Hazard Awareness

Familiarize yourself with controls and proper use, be aware of surroundings, and avoid hazards.

Vibration Effects and Raynauds Syndrome

Learn about potential vibration-related conditions like Raynaud's Syndrome and preventive measures.

Specific Safety Rules for Hedge Trimmer Use

Product Symbols and Their Meanings

Safety and Operation Symbols

Covers symbols for safety alerts, manual reading, eye/hearing protection, hot surfaces, and sharp blades.

Fuel and Lubricant Information Symbol

Explains the symbol for gasoline and lubricant, including octane rating and mixture requirements.

Signal Words and Service Information

Signal Word Definitions for Hazard Levels

Defines DANGER, WARNING, and CAUTION to communicate the severity of potential hazards.

Service and Eye Protection Warnings

Highlights servicing by qualified technicians and the critical need for eye protection during operation.

Hedge Trimmer Features and Components

Product Specifications

Lists technical specifications including cutting capacity, blade length, power output, and weight.

Key Components and Operation Features

Details the rotating handle, scabbard, trigger lock, and general operation familiarity.

Assembly and Preparation for Operation

Unpacking and Packing List

Guide for unpacking the hedge trimmer, verifying all included items, and inspecting for shipping damage.

Assembly and Modification Warnings

Critical warnings against operating with damaged parts, unauthorized modifications, or improper assembly.

Operation: Applications and Fueling

Applications of the Hedge Trimmer

Lists the intended uses of the product, such as trimming hedges and shaping shrubbery.

Fuel Mixture and Refueling Procedures

Details the correct fuel mixture, type of gasoline, and the process of safely refueling the trimmer.

Operation: Starting and Stopping the Hedge Trimmer

Filling the Fuel Tank Safely

Step-by-step guide on how to safely fill the fuel tank, avoiding spillage and contamination.

Engine Starting and Stopping Procedures

Instructions for starting a cold or warm engine, and how to stop the engine safely.

Operation: Cutting Techniques and Safety

Rotating Handle and Cutting Tips

Instructions on using the rotating handle and effective cutting techniques for various hedge types.

General Hedge Trimmer Operation Safety

Guidelines for safe operation, including grip, body positioning, and area inspection before use.

Maintenance: General and Blade Replacement

General Maintenance and Cleaning

Advice on cleaning plastic parts and avoiding damage from solvents or chemicals during maintenance.

Blade Replacement Procedure

Step-by-step instructions for safely removing and installing new hedge trimmer blades.

Maintenance: Lubrication and Cleaning

Blade Lubrication and Trimmer Cleaning

Procedure for lubricating the blade and cleaning the hedge trimmer body for optimal performance.

Air Filter and Fuel Cap Maintenance

Instructions for cleaning the air filter screen and checking the fuel cap for performance issues.

Maintenance: Adjustments and Storage

Engine Adjustments and Spark Plug Service

Covers idle speed adjustment, spark plug replacement, and cleaning the exhaust port and muffler.

Spark Arrestor and Storage Guidelines

Details spark arrestor maintenance and proper procedures for storing the hedge trimmer.

Troubleshooting Guide for Hedge Trimmer Issues

Engine Starting Problems

Troubleshooting steps for when the engine fails to start, including spark, fuel, and flooding issues.

Engine Performance Issues

Addresses problems like not accelerating, excessive smoke, or inability to idle correctly.

Limited Warranty Statement for Ryobi Hedge Trimmer

Warranty Coverage and Duration

Specifies warranty duration for personal use versus commercial use and what is covered.

Warranty Exclusions and Limitations

Lists conditions not covered by warranty, such as misuse, neglect, and unauthorized modifications.

Emissions Control System Warranty Information

Owner Responsibilities for Emission Warranty

Outlines the owner's duties for maintenance and presenting the engine for warranty service.

Defect Coverage and Emission Parts

Specifies requirements for warranty claims and lists components covered under the emission warranty.

Emissions Maintenance Schedule and Parts List

Emissions Maintenance Schedule and Intervals

Details inspection and cleaning intervals for key emissions-related parts like the air filter.

Warranted Parts and Support Contact

Lists parts covered by the emissions warranty and provides contact info for the Ryobi Help Line.

Parts, Service, and Technical Support Information

Obtaining Replacement Parts and Service

Instructions on purchasing parts, finding authorized service centers, and getting technical support.

Customer and Technical Support Contact

Provides contact details for customer or technical support assistance with the Ryobi hedge trimmer.

Ryobi RY39500 Specifications

General

Engine Type	2-Cycle
Weight	11.5 lbs
Line Diameter	0.095 in
Starting System	Recoil
Attachment Capable	Yes
Power Source	Gasoline
Battery Included	No
Charger Included	No
Cutting Swath	18 in
Cutting Path	18 in