Ryobi RY34001 Cleaning the Exhaust Port and Muffler Spark Arrestor, Idle Speed Adjustment

MAINTENANCE

WARNING:

Do not at any time let brake fluids, gasoline, petroleum- based products, penetrating lubricants, etc., come in con- tact with plastic parts. Chemicals can damage, weaken or destroy plastic which may result in serious personal injury.

You can often make adjustments and repairs described here. For other repairs, have the power head serviced by an authorized service dealer.

CLEANING THE EXHAUST PORT AND MUFFLER

NOTE: Depending on the type of fuel used, the type and amount of lubricant used, and/or your operating conditions, the exhaust port, muffler, and/or spark arrestor screen may be- come blocked with carbon deposits. If you notice a power loss with your gas powered tool, you may need to remove these deposits to restore performance. We highly recom- mend that only qualified service technicians perform this service.

SPARK ARRESTOR

The spark arrestor must be cleaned or replaced every 50 hours or yearly to ensure proper performance of your prod- uct. Spark arrestors may be in different locations depending on the model purchased. Please contact your nearest au- thorized service dealer for the location of the spark arrestor for your model.

IDLE SPEED ADJUSTMENT

See Figure 9.

If the cutting attachment turns at idle, the idle speed screw needs adjusting on the engine. Turn the idle speed screw counterclockwise to reduce the idle RPM and stop the cut- ting attachment movement. If the cutting attachment still moves at idle speed, contact a service dealer for adjustment and discontinue use until the repair is made.

WARNING:

The cutting attachment should never turn at idle. Turn the idle speed screw counterclockwise to reduce the idle RPM and stop the cutting attachment, or contact a service dealer for adjustment and discontinue use until the repair is made. Serious personal injury may result from the cutting attachment turning at idle.

CLEANING AIR FILTER SCREEN

See Figures 10 - 11.

For proper performance and long life, keep air filter screen clean.

Remove the air filter cover by pushing down on the latch with your thumb while gently pulling on the cover.

Brush the air filter screen lightly to clean.

Replace the air filter cover by inserting the tabs on the bottom of the cover into the slots on the air filter base; push the cover up until it latches securely in place.

FUEL CAP

WARNING:

Check for fuel leaks. A leaking fuel cap is a fire hazard and must be replaced immediately. If you find any leaks, correct the problem before using the product. Failure to do so could result in a fire that could cause serious personal injury.

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

SPARK PLUG REPLACEMENT

This engine uses a Champion RY4C spark plug with

.025 in. electrode gap. Use an exact replacement and re- place annually.

CHANGING ENGINE LUBRICANT

See Figure 12.

For best performance, engine lubricant should be changed after every 25 hours of operation.

To change the engine lubricant:

Stop the engine and disconnect the spark plug wire. Allow the engine to cool completely before proceeding.

Remove the screw from the top engine cover and set aside.

Remove the screws from the bottom of the engine cover. Remove the bottom cover and set aside.

Remove the oil fill cap/dipstick.

Tip power head on its side and allow lubricant to drain from the oil fill hole into an approved container.

NOTE: Drain the lubricant while the engine is still warm but not hot. Warm lubricant will drain quickly and more completely.

Return the power head to an upright position and refill with lubricant following the instructions in the Adding/ Checking Engine Lubricant section previously in this manual.

10 — English