Ryobi 990r manual OIL & FUEL INFORMATION Continued, Changing The Oil, Recommended Fuel Type

OIL & FUEL INFORMATION (Continued)

O-ring

Full (100 ml/3.4 oz)

Add Oil

Fig. 17

CHANGING THE OIL

For a new engine, change the oil after the first 10 hours of operation. Thereafter, change the oil after every 25 hours or before storing the unit for an extended period of time.

Change the oil while the engine is still warm. The oil will flow freely and carry away more impurities.

Change the oil as follows:

1.Remove the oil fill plug / dipstick.

2.Pour the oil into a container by tipping the trimmer in a vertical position (Fig. 18). Be sure to allow ample time for complete drainage. Dispose of oil properly.

Fig. 18

3.Fill the crankcase, with new oil of the proper type, to the top of the dipstick. Use the bottle saved from the initial use.

4.Reinstall the oil fill plug / dipstick and tighten securely.

NOTE: Make sure the O-ring is in place on the oil fill plug when checking and changing the oil.

NOTE: To prevent extensive engine wear or damage, always maintain the proper oil level in the crankcase. Never operate the engine with oil level below the bottom of the dipstick.

RECOMMENDED FUEL TYPE

WARNING

Fuel is extremely flammable and its vapors can explode if they are ignited. Always stop the engine and allow it to cool before filling the fuel tank. Do not smoke while filling the tank. Keep sparks and open flames away from the area.

Fill the fuel tank, using clean, fresh, unleaded gasoline.

NOTE: Alcohol blended fuel absorbs moisture (water). As little as 1% moisture in the fuel can cause fuel to separate and form acids when stored.

If this type of fuel must be used, use fresh fuel (less than 60 days old).

DEFINITION OF BLENDED FUELS

Today's fuels are often a blend of gasoline and one or more oxygenates such as ethanol, methanol or MTBE (ether).

USE OF BLENDED FUELS

If you choose to use a blended fuel or its use is unavoid- able, the following precautions are recommended.

1.Always use fresh fuel.

2.Use the special additive GASOHOL GAS TREAT- MENT® (by Gold Eagle) or an equivalent to inhibit corrosion.

3.Drain tank and run engine dry before storing the unit.

USE OF FUEL ADDITIVES

The use of fuel additive such as STA-BIL®Gas Stabilizer or an equivalent, will inhibit corrosion and minimize the for- mation of gum deposit. Add (23 ml) 0.8 oz per gallon of fuel per instructions on container. NEVER add fuel addi- tives directly to the unit's fuel tank. Using a fuel additive can keep fuel fresh for up to six (6) months.

12