String Trimmer Owner/Operator Manual Model 946150 – ST622 CARB ENGLISH 01284000 11/07 Printed in USA
TABLE OF CONTENTS Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Troubleshooting . . . . . . . . . . . . . . . . . 18 Assembly . . . . . . . . . . . . . . . . . . . . . . . . 9 Storage . . . . . . . . . . . . . . . . . . . . . . . . . 19 Controls and Features . . . . . . . . . . . . 10 Service Parts . . . . . . . . . . . . . . . . . . . . 19 Operation . . . . . . . . . . . . . . . . . . . . . . . 11 Specifications . . . . . . . . . . . . . . . . . . . 19 Maintenance . . . . . . . . .
PRODUCT REGISTRATION The Ariens dealer must register the product at the time of purchase. Registering the product will help the company process warranty claims or contact you with the latest service information. All claims meeting requirements during the limited warranty period will be honored, whether or not the product registration card is returned. Keep a proof of purchase if you do not register your unit.
1. DANGER! TO AVOID SERIOUS INJURY OR DEATH CAUTION: POTENTIALLY HAZARDOUS SITUATION! If not avoided, MAY RESULT in minor or moderate injury. It may also be used to alert against unsafe practices. Read the Operator’s Manual. OL1801 NOTATIONS NOTE: General reference information for proper operation and maintenance practices. IMPORTANT: Specific procedures or information required to prevent damage to unit or attachment. OL4740 Always wear protective glasses, goggles or a face shield.
ALWAYS disconnect wire from spark plug before assembly. Unintentional engine start up can cause death or serious injury. Complete a walk around inspection of unit and work area to understand: • work area • your unit • all safety decals. Clear work area of stones, sticks, wire and foreign objects which might be picked up and thrown. Tall grass can hide obstacles. Know the work area. Stay alert for holes, rocks, rough terrain and hidden hazards.
To reduce fire hazard and overheating, keep equipment free of grass, leaves, debris or excessive lubricants. Use extra care when approaching blind corners, shrubs, trees, or other objects which may obscure vision. DO NOT trim at too fast a rate. DO NOT change engine governor setting or over-speed the engine. Do not operate trimmer on gravel or on loose material such as sand. Stop trimmer when crossing gravel drives, walks, or roads to prevent damage or injury from thrown objects.
ASSEMBLY Handlebar Assembly WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. TOOLS REQUIRED • Box knife to cut carton TO REMOVE UNIT FROM CARTON 1. Cut off top of box. 2. Remove packing material. 3. Remove literature pack, safety glasses and bottle of oil from box. 4. Cut out back of box and pull the unit out. 5. Remove protective packaging materials from trimming head and around unit.
CONTROLS AND FEATURES 9 5 13 3 6 4 7 11 8 10 OX0253 12 OX0251 2 1 15 14 OX0252 16 1. 2. 3. 4. 5. 6. 7. 8. Trimmer Head Trimmer Line Upper Handlebar Lower Handlebar Control Bail Throttle Control Lever Recoil Starter Handle Handlebar Wing Knob 9. Oil Dipstick and Cap 10.Fuel Tank and Cap 11. Debris Screen 12.Air Cleaner 13.Primer Bulb 14.Swivel Head Lock 15.Trimmer Shield 16.
OPERATION CONTROLS AND FEATURES FILLING FUEL TANK See Controls and Features on page 10. WARNING: EXPLOSIVE VAPORS and FLAMMABLE FUEL can result in serious injury or death. Handle fuel with care. ALWAYS use an approved fuel container. No Smoking! No Lighted Materials! No Open Flame! Allow engine to cool before maintenance. Never fill tank when engine is running or is hot from operation. DO NOT overfill tank. Allow about 1/4" (6.35 mm) of space at the top of the filler neck for fuel expansion.
TO STOP IN AN EMERGENCY To stop in an emergency, release control bail. When all moving parts have stopped, push throttle control lever to stop. TO START AND SHUT OFF ENGINE Pre-Start TO TRAVEL TO ANOTHER WORK AREA When crossing driveways or bare areas, release the control bail to stop trimmer head rotation and push down slightly on the handlebar to lift the trimmer head off the ground. This prevents premature wear of the trimmer head. TRIMMING TIPS 1. Check engine oil level. See Engine Manual. 2.
MAINTENANCE WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. Wood Block Maintenance Schedule Service Performed Intervals (Hours) Each Use Check Fasteners • Check Trimmer Lines • Check Control Bail Operation • Check Engine Oil • Clean Debris Screen • Clean Unit •1 Check Air Cleaner 25 OX0261 CHECK FASTENERS Make sure all hardware is tightened properly. Pay special attention to handlebar, guards, shields, and trimmer head mounting hardware.
CHECK SPARK PLUG See Engine Manual for specific information on checking, cleaning, and changing the spark plug. CHANGE ENGINE OIL Change the engine oil after the first 2 hours of use, then every 25 hours or every season, whichever comes first. Oil should be changed when engine is warm. 1. Disconnect spark plug wire. 2. Clean area around oil cap. 3. Tip the string trimmer on its right side. CAUTION: Before tipping unit, remove enough fuel so no spillage will occur.
CUTTING HEIGHT ADJUSTMENT HEIGHT GUIDE REPLACEMENT The standard cutting height is adjustable from 1-3/16" to 4-3/8" (3 to 11.1 cm). To raise the cutting height, place more spacers (up to 4) below the cutter disk. Spacers not used under the cutter disk must be assembled above the cutter disk. For example, if you place two spacers under the cutter disk, the other two spacers must be in place above the cutter disk. NOTE: There must always be at least one spacer between the cutter disk and the height guide.
CONTROL BAIL TRAVEL ADJUSTMENT DRIVE BELT REPLACEMENT Control Bail must disengage trimmer head as control is released. There should be a slight amount of slack in the control cable wire when bail is fully released. If the trimmer head does not disengage completely when the control bail is released, increase the amount of slack in the control cable wire as follows: 1. Loosen the bottom cable nut. 2. Push the cable conduit upward toward the control bail. 3.
To remove the old belt: 1. Stop the engine and wait for all moving parts to stop. Disconnect the spark plug wire and place it securely away from the spark plug. 2. Place unit in service position (see Maintenance section). 7 6 5 4 CAUTION: Before tipping unit, remove enough fuel so no spillage will occur. A piece of plastic bag may be used to seal fuel tank when tipping unit.
TROUBLESHOOTING PROBLEM Engine will not start or runs poorly PROBABLE CAUSE 1. 2. 3. 4. Spark plug wire disconnected. Engine not primed Fuel tank empty. Throttle control lever not in correct position. 5. Engine is flooded. 6. Defective or incorrectly gapped spark plug. 7. Stale or contaminated gasoline. 8. Engine cooling system overloaded with debris. 9. Dirty carburetor or fuel line. 10.Dirty air filter or precleaner. 11. Carburetor out of adjustment. CORRECTION 1. 2. 3. 4. Connect spark plug wire.
STORAGE SPECIFICATIONS Model Number Description WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. Engine If the trimmer is to be stored for more than 30 days, follow these steps to prepare your unit. 1. Run the engine until it stops from running out of gasoline. See Engine Manual for specific instructions on preparing the engine for storage. 2. Clean all dirt and debris from the trimmer. Refer to Maintenance for cleaning instructions. 3.
Ariens Limited Warranties 2-Year Limited Lawn and Garden Consumer Warranty Ariens Company (Ariens) warrants to the original purchaser that Ariens and Gravely brand consumer products manufactured by Ariens Company will be free from defects in material and workmanship for a period of two (2) years after the date of purchase, and that Ariens will repair any defect in material or workmanship, and repair or replace any defective part, subject to the conditions, limitations and exclusions set forth herein.
Exceptions, Limitations, Exclusions These warranties are subject to the following conditions, limitations, and exclusions: The following items are excluded from this To obtain warranty service, the following warranty: conditions must be met: • Engines and engine accessories are covered • The purchaser must perform the only by the engine manufacturer’s warranty maintenance and minor adjustments and are not covered by this warranty. explained in the owner’s manual.
Ariens Company • 655 W. Ryan St. • Brillion, WI 54110-1072• (920) 756-2141 • www.ariens.
Ariens Company 655 West Ryan Street Brillion, WI 54110-1072 920-756-2141 Fax 920-756-2407 www.ariens.com WARNING The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
