MAINTENANCE

VACUUM BAG

A dirty bag will reduce performance. To clean the bag, turn it inside out and shake. Wash the bag in soapy water at least once a year. To obtain a replacement bag, see How to Order Replacement Parts on the back page of this manual.

FUEL CAP

WARNING:

A leaking fuel cap is a fire hazard and must be replaced immediately.

The fuel cap contains a non-serviceable filter and a check valve. A clogged fuel filter will cause poor engine performance. If performance improves when the fuel cap is loosened, check valve may be faulty or filter clogged. Replace fuel cap if required.

SPARK PLUG replacement

This engine uses a Ryobi AC00160, Champion RCJ-6Y or NGK BPMR7A spark plug with .025 in. electrode gap. Use an exact replacement and replace annually.

STORING THE PRODUCT

Clean all foreign material from the product. Store idle unit indoors in a dry, well-ventilated area that is inaccessible to children. Keep away from corrosive agents such as garden chemicals and de-icing salts.

Abide by all ISO and local regulations for the safe storage and handling of gasoline.

When storing 1 month or longer:

Drain all fuel from tank into a container approved for gasoline. Run engine until it stops.

TROUBLESHOOTING

IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM, CONTACT YOUR AUTHORIZED SERVICING DEALER.

Problem

 

Cause

 

Remedy

 

 

 

 

Engine fails to start.

No fuel in tank.

Fill tank.

 

 

Spark plug shorted or fouled.

Replace spark plug.

 

Spark plug is broken. (cracked

Replace spark plug.

 

porcelain­

or electrodes broken)

 

 

 

Ignition lead wire shorted, broken, or

Replace lead wire or attach to spark

 

disconnected from spark plug.

plug.

 

 

Ignition inoperative.

Contact authorized service center.

 

 

 

Engine hard to start.

Water in gasoline or stale fuel mixture.

Drain entire system and refill with fresh

 

 

 

fuel.

 

 

Too much lubricant in fuel mixture.

Drain and refill with correct mixture.

 

Engine is under or over choked.

Adjust choke as necessary.

 

Weak spark at spark plug.

Contact authorized service center.

 

 

 

Engine lacks power.

Air filter clogged.

Clean air filter. Refer to Cleaning the

 

 

 

Air Filter Screen earlier in this manual.

Engine overheats.

Insufficient lubricant in fuel mixture.

Mix fuel as described in starting

 

 

 

instructions­

.

 

 

 

 

 

11 - English

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Ryobi RY09550, RY09951 Troubleshooting, Vacuum BAG, Fuel CAP, Spark Plug replacement, Storing the Product

RY09550, RY09951 specifications

The Ryobi RY09550 and RY09951 are innovative gas-powered string trimmers designed to tackle yard maintenance with efficiency and ease. Ryobi has established itself as a trusted name in outdoor power equipment, and these models exemplify the brand’s commitment to performance, durability, and user-friendly features.

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