2.5 HP HORIZONTAL OHV GASOLINE ENGINE Model 97964 Set up, Operating, and Servicing Instructions Using an engine indoors CAN KILL YOU IN MINUTES. Engine exhaust contains carbon monoxide. This is a poison you cannot see or smell. NEVER use inside a home or garage, EVEN IF doors and windows are open. Only use OUTSIDE and far away from windows, doors, and vents. Visit our website at: http://www.harborfreight.com Read this material before using this product. Failure to do so can result in serious injury.
Contents PARTS LIST ��������������������������������� 16 ASSEMBLY DIAGRAM ���������������� 17 Important SAFETY Information ���������������������������� 3 Limited 1 year / 90 Day warranty ������������������������������ 18 Basic Specifications ������������� 6 Unpacking ���������������������������������� 6 Emission Control System Warranty ������������������������������ 18 Set Up Instructions ��������������� 6 Operating Instructions ������ 7 Engine Controls ������������������������� 7 Starting the Engine ����
Save This Manual NOTICE is used to address practices not related to personal injury. Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
. Mount and use the Engine securely and only on a flat, level, well-ventilated surface. 5. Wear ANSI-approved safety goggles, heavy-duty work gloves, and dust mask/respirator during set up. 6. Use only oil and fuel recommended in the “Specifications” section of this manual. Operating precautions 1. Carbon Monoxide Hazard Using an engine indoors CAN KILL YOU IN MINUTES. Engine exhaust contains carbon monoxide. This is a poison you cannot see or smell.
13. Keep the Engine and surrounding area clean at all times. 14. Use the Engine in accordance with these instructions and in the manner intended for the particular type of Engine, taking into account the working conditions and the work to be performed. Use of the Engine for operations different from those intended could result in a hazardous situation. 15. Do not operate the Engine with known leaks in the Engine’s fuel system. 16.
7. Store the Engine out of the reach of children. information, refer to the last pages of this manual. 8. Follow scheduled engine maintenance. At high altitudes, the Engine’s carburetor, governor and any other parts that control the fuel-air ratio will need to be adjusted by a qualified mechanic to allow efficient high-altitude use and to prevent damage to the Engine and any other devices used with this product. Refueling Precautions: 1.
Operation of this equipment may create sparks that can start fires around dry vegetation. A spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements. Note: For additional information regarding the parts listed in the following pages, refer to the Assembly Diagram near the end of this manual. Note: See Mounting Base Layout Diagram and Engine Shaft Layout Diagram on page 10. 1. 2. 3.
FIGURE B 4. Replace the Oil Dipstick. (See Figure B.) CAUTION! Do not run the Engine with too little or too much oil. The Engine will be permanently damaged. Checking and Filling Fuel WARNING! To prevent serious injury from fire: Fill the Fuel Tank in a well-ventilated area away from ignition sources. Do not smoke. FIGURE D FUEL TANK (96) DIPSTICK (48) 1. FUEL TANK FILTER (96) Remove the Dipstick and wipe it off with a clean rag. (See Figure B.) FIGURE C FUEL TANK CAP (96) 1.
6. NOTE: Always check the Fuel Tank Filter (96) for excess dirt and debris before each use. If necessary, remove and clean the Fuel Tank Filter. Then re-install the Filter in the Fuel Tank (96) and replace the Fuel Tank Cap (96). (See Figure D.) its “RUN” position. Then adjust the Throttle (64) to the desired Engine speed (RPM). (See Figure E.) 6. IMPORTANT: Allow the Engine to run at no load until warm (1-5 minutes) with no load after each start-up to allow the Engine to stabilize.
2-9/16” (65mm) Hole Distance 2-31/64” (63mm) Hole Distance 4-3/32” (104mm) Hole Distance REV 08e, 08h SKU 97964 For technical questions, please call 1-800-444-3353.
Technical Specifications Engine Type 2.5 HP OHV Single Cylinder Bore x Stroke 52mm x 38mm Displacement 79cc Maximum Engine RPM 3600 Engine Model 152F Engine Family 8YAMS.0791ST Engine Shaft Direction Horizontal Rotation viewed from PTO (power takeoff - the output shaft) Counterclockwise Facing the Shaft Shaft Size/Type 5/8” diameter Keyed Fuel Engine Oil Spark Plug Type 89+ octane unleaded gasoline Capacity .42 Gal. (1.
3. Replace the Drain Plug Bolt and Drain Plug Washer (69). Replace the washer, if damaged. Tighten the plug. (See Figure F.) 5. 4. Refill the oil to the proper level following the instructions under the “Starting the Engine” section. Spark Plug Maintenance 1. Disconnect Spark Plug Wire from end of the Spark Plug. Clean out debris from around Spark Plug. 2. Using the provided Spark Plug Wrench, remove the Spark Plug. 3.
Inspection, maintenance, and cleaning schedule Note: This maintenance schedule is intended solely as a general guide. If performance decreases or if Engine operates unusually, check systems immediately. The maintenance needs of each part of the Engine will differ depending on factors such as duty cycle, temperature, air quality, fuel quality, and other factors. Storage 1. Wait for Engine to cool, then wipe Engine with clean cloth. 2.
fuel stabilizer’s recommended time period, or if the Engine does not start properly. PLEASE READ THE FOLLOWING CAREFULLY The manufacturer and/or distributor has provided the parts list and assembly diagram in this manual as a reference tool only. Neither the manufacturer or distributor makes any representation or warranty of any kind to the buyer that he or she is qualified to make any repairs to the product, or that he or she is qualified to replace any parts of the product.
Problem Engine will not start Troubleshooting Possible Cause Possible Solution Fuel Related: 1. No fuel in tank or fuel valve closed. 2. Choke not in start position, especially with cold engine. 3. Low quality or deteriorated, old gasoline. 4. Carburetor not primed. Fuel Related: 1. Fill fuel tank and open fuel valve. 2. Move choke to start position if engine is cold. 3. Use only fresh 89+ octane unleaded gasoline. 4. Prime carburetor by pressing priming bulb specified number of times (if equipped).
Problem Engine misfires Troubleshooting Possible Cause 1. Spark plug wire loose. 2. Incorrect spark plug gap or damaged spark plug. 3. Defective spark plug wire. 4. Old or low quality gasoline. 5. Incorrect compression. Engine stops suddenly 1. Check wire connections. 2. Re-gap or replace spark plug. 3. Replace spark plug wire. 4. Use only fresh 89+ octane unleaded gasoline. 5. Diagnose and repair compression. (Use Engine will not start: Compression Related section.) 1. Low oil shutdown. 2. 3. 4. 5.
PARTS LIST CASE COVER THROTTLE CARBURETOR W/CHOKE CARBURETOR SPACER BOLT MUFFLER FAN COVER EXHAUST VALVE INTAKE VALVE POWER SWITCH DIPSTICK SKU 97964 For technical questions, please call 1-800-444-3353.
ASSEMBLY DIAGRAM SKU 97964 For technical questions, please call 1-800-444-3353.
Limited 1 year / 90 Day warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that for a period of ninety days from date of purchase that the engine/motor, the belts (if so equipped), and the blades (if so equipped) are free of defects in materials and workmanship.
Owner’s Warranty Responsibilities • As the engine owner, you are responsible for the performance of the required maintenance listed in your Owner’s Manual. HFT recommends that you retain all receipts covering maintenance on your engine, but HFT cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.
