Ryobi BP42 Wont Start(7 Quick Ways to Fix)

The Ryobi BP42 backpack blower is a popular choice among homeowners and professionals alike for its power and efficiency in clearing leaves and debris.

However, it can encounter issues that prevent it from starting.

If you’re facing the frustrating problem of a Ryobi BP42 that won’t start, fear not!

This comprehensive troubleshooting guide will walk you through common causes and practical solutions to get your blower up and running again.

Ryobi BP42 Wont Start

Ryobi bp42 wont start

1. Check the fuel system.

One of the most common reasons for a Ryobi BP42 not starting is fuel-related issues. Start by ensuring that the blower has enough fuel in the tank.

If it’s running low, refill it with fresh, properly mixed fuel, as specified in the user manual. Remember to use the correct fuel-to-oil ratio to avoid engine damage.

Inspect the fuel lines for any cracks, leaks, or blockages. Replace damaged or clogged fuel lines to ensure proper fuel flow.

Also, check the fuel filter for clogs or debris. A dirty or blocked fuel filter can restrict fuel delivery and cause starting problems. If necessary, clean or replace the fuel filter.

2. Verify the spark plug condition.

A faulty or worn-out spark plug can prevent the engine from starting. Remove the spark plug and inspect it for signs of damage, such as fouling or excessive wear.

If the spark plug appears dirty or worn, it’s advisable to replace it with a new one. Keep in mind that you should use the correct spark plug model that the manufacturer has recommended.

3. Examine the air filter.

A clogged or dirty air filter can restrict airflow to the engine, leading to starting difficulties.

Locate the air filter housing, usually located on the side or back of the blower, and remove the air filter.

Inspect it for dirt, debris, or damage. Clean a reusable air filter with soap and water, or replace a disposable one if necessary.

Ensure the air filter is dry before reinserting it into the blower.

4. Check the ignition system.

A malfunctioning ignition system can prevent the engine from firing up. Start by inspecting the ignition switch and wiring for any visible damage or loose connections. Ensure the ignition switch is in the “on” position.

Next, examine the ignition coil and spark arrestor screen. The ignition coil generates the electrical spark needed to ignite the fuel.

A faulty coil can hinder the starting process. Similarly, a clogged spark arrestor screen can restrict exhaust flow and cause starting problems. Clean or replace these components as required.

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5. Evaluate the carburetor.

A dirty or improperly adjusted carburetor can cause starting issues in the Ryobi BP42.

Begin by cleaning the carburetor, removing any debris or residue that may be obstructing the fuel flow.

Use carburetor cleaner and compressed air to clear out the jets, passages, and diaphragm.

If cleaning the carburetor doesn’t resolve the problem, consider adjusting the carburetor settings.

Refer to the user manual or seek guidance from a professional to ensure proper adjustment, as incorrect settings can lead to engine damage.

6. Test the compression.

Low compression in the engine can also prevent it from starting. Perform a compression test using a compression gauge to measure the engine’s compression levels.

If the compression is significantly lower than the manufacturer’s specifications, it may indicate a worn-out piston, rings, or cylinder.

In such cases, professional assistance may be required to repair or rebuild the engine.

7. Seek professional assistance.

If all the above steps fail to resolve the issue, it’s advisable to seek professional assistance.

An authorized Ryobi service center or a qualified small engine technician will have the expertise and specialized tools to diagnose and fix more complex problems.

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Maintenance TipsDescription
Fuel System– Use fresh fuel with the correct fuel-to-oil ratio specified in the user manual.
– Check fuel lines for cracks, leaks, or blockages.
– Clean or replace clogged fuel lines.
– Inspect and clean the fuel filter.
– Drain and replace fuel if it has been sitting for a long time.
Air Filter– Regularly clean or replace the air filter to prevent debris from entering the engine.
– Inspect for damage and ensure a proper fit.
– Clean reusable filters with soap and water, and let them dry before reinstalling.
– Replace disposable filters when they are dirty or damaged.
Spark Plug– Inspect the spark plug regularly for signs of wear, fouling, or damage.
– Clean or replace the spark plug if necessary.
– Use the recommended spark plug type and gap as specified in the user manual.
Carburetor Maintenance– Clean the carburetor periodically to remove dirt, debris, and varnish buildup.
– Use a carburetor cleaner and follow the manufacturer’s instructions.
– Check and adjust the carburetor settings if needed, following the user manual or professional guidance.
Ignition System– Inspect the ignition system for loose connections, damaged wires, or worn-out components.
– Ensure the ignition switch is functioning properly.
– Clean or replace the ignition coil and spark arrestor screen as needed.
Compression Testing– Perform a compression test to check the engine’s compression levels.
– Low compression may indicate the need for engine repair or maintenance.
– Consult a professional if the compression is significantly lower than the manufacturer’s specifications.
Professional Maintenance– If you encounter persistent issues or complex problems, seek assistance from an authorized Ryobi service center or a qualified small engine technician.
-They have the expertise and tools to diagnose and repair more complicated issues.

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Final Remarks

Dealing with a Ryobi BP42 backpack blower that won’t start can be frustrating, but with a systematic troubleshooting approach, most issues can be resolved.

By following the steps outlined in this guide, you’ll be able to identify and address common causes of starting problems,

such as fuel system issues, spark plug or air filter problems, ignition system malfunctions, carburetor troubles, and even compression issues.

However, if the problem persists, don’t hesitate to consult a professional. With proper maintenance and care, your Ryobi BP42 blower will be back to its powerful performance in no time.

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FAQ

Why won’t my Ryobi BP42 backpack blower start?

There could be several reasons why your Ryobi BP42 blower won’t start. Common causes include fuel system issues,

such as low fuel or clogged fuel lines; a faulty spark plug; a dirty or clogged air filter; ignition system problems; carburetor malfunctions; or even low engine compression.

How can I check the fuel system?

Start by ensuring that the blower has enough fuel in the tank and that it is properly mixed with oil according to the manufacturer’s instructions. Inspect the fuel lines for cracks, leaks, or blockages. Clean or replace the fuel filter if necessary.

What should I do if the spark plug is defective?

If the spark plug appears dirty, fouled, or worn out, it’s best to replace it with a new one. Make sure to use the manufacturer’s recommended spark plug model.

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How do I clean the air filter?

To clean the air filter, remove it from the blower and inspect it for dirt, debris, or damage.

If it is a reusable filter, clean it using soap and water, then let it dry before reinserting it. If it is a disposable filter, replace it if it is dirty or damaged.

How can I check the ignition system?

Inspect the ignition switch and wiring for any visible damage or loose connections.

Ensure the ignition switch is in the “on” position. Additionally, check the ignition coil and spark arrestor screen for any issues. Clean or replace these components as needed.

What should I do if the carburetor is causing the problem?

Start by cleaning the carburetor to remove any debris or residue that may be obstructing fuel flow.

If cleaning doesn’t solve the issue, consider adjusting the carburetor settings following the manufacturer’s instructions or seeking professional assistance.

What if none of these steps work?

If you have followed all the troubleshooting steps and your Ryobi BP42 blower still won’t start, it’s recommended that you seek professional assistance.

An authorized Ryobi service center or a qualified small engine technician will have the expertise and specialized tools to diagnose and fix more complex issues.

George Bill
George Bill

George Bill is a Mechanical Engineer by Profession and an avid gardener and has been mowing his lawn for over 20 years. He has used a variety of different mowers during this time.
George is an expert at maintaining his mowers and over the years, he has learned many tricks and techniques for getting the best results from his mowers and is always happy to share his knowledge on this site.