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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
Only use OuTSIdE
a home or garage,
and far away from
EVEN IF doors and
windows, doors, and
windows are open.
vents.
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result i
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PARTS LIST ................................. 16 cONTENTS ASSEMBLY dIAGRAM ................ 17 IMPORTANT SAFETY INFORMATION ............................ 3 LIMITEd 1 YEAR / 90 dAY wARRANTY .............................. 18 BASIc SPEcIFIcATIONS ............. 6 EMISSION cONTROL SYSTEM uNPAcKING .................................. 6 wARRANTY .............................. 18 SET uP INSTRucTIONS ............... 6 OPERATING INSTRucTIONS ...... 7 ENGINE cONTROLS .........................7 STARTING THE
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NOTIcE is used to SAVE THIS MANuAL address practices Keep this manual for the safety warn- not related to personal injury. ings and precautions, assembly, operat- cAuTION, without ing, inspection, maintenance and cleaning the safety alert procedures. Write the product’s serial symbol, is used to address number in the back of the manual near the practices not related to assembly diagram (or month and year of personal injury. purchase if product has no number). Keep this manual and
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4. Mount and use the Engine securely 4. Wear ANSI-approved safety goggles and only on a flat, level, well-venti- and hearing protection during use. lated surface. 5. People with pacemakers should 5. Wear ANSI-approved safety goggles, consult their physician(s) before heavy-duty work gloves, and dust use. Electromagnetic fields in close mask/respirator during set up. proximity to a heart pacemaker could cause pacemaker interference or 6. Use only oil and fuel recommended pacemaker failur
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13. Keep the Engine and surrounding SERVIcE PREcAuTIONS area clean at all times. 1. Before service, maintenance, or 14. Use the Engine in accordance with cleaning: these instructions and in the man- a. Turn the Power Switch (94) to its ner intended for the particular type “OFF” position. of Engine, taking into account the b. Allow the Engine to completely working conditions and the work to be cool. performed. Use of the Engine for op- erations different from those intended c. Then, rem
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7. Store the Engine out of the reach of information, refer to the last pages of this children. manual. 8. Follow scheduled engine mainte- At high altitudes, the Engine’s car- nance. buretor, governor and any other parts that control the fuel-air ratio will need to be adjusted by a qualified mechanic to allow REFuELING PREcAuTIONS: efficient high-altitude use and to prevent damage to the Engine and any other de- 1. Do not smoke, or allow sparks, vices used with this product. flames, or othe
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Operation of this equipment subheadings therein before set may create sparks that up or use of this product. can start fires around dry vegetation. Engine controls 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. cHOKE POwER (22) SwITcH FuEL VALVE
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4. Replace the Oil Dipstick. FIGuRE B (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-ven- tilated area away from ignition sourc- es. Do not smoke. FIGuRE d FuEL TANK FuEL TANK FILTER dIPSTIcK (96) (96) (48) 1. Remove the Dipstick and wipe it off with a clean rag. (See Figure B.) FIGuRE c FuEL TANK cAP (96) 1. To f
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6. NOTE: Always check the Fuel Tank its “RUN” position. Then adjust the Filter (96) for excess dirt and debris Throttle (64) to the desired Engine before each use. If necessary, re- speed (RPM). (See Figure E.) move and clean the Fuel Tank Filter. 6. IMPORTANT: Allow the Engine to run Then re-install the Filter in the Fuel at no load until warm (1-5 minutes) Tank (96) and replace the Fuel Tank with no load after each start-up to al- Cap (96). (See Figure d.) low the Engine to stabi
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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. Page 10
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Maintenance Procedures TEcHNIcAL SPEcIFIcATIONS Many maintenance procedures, including those not detailed Engine Type 2.5 HP OHV Single Cylinder in this manual, will need to Bore x Stroke 52mm x 38mm be performed by a qualified Displacement 79cc technician for safety. If you Maximum Engine RPM 3600 Engine Model 152F have any doubts about your Engine Family 8YAMS.0791ST ability to safely service the Engine Shaft Direction Horizontal Engine have a qualified Rotation viewed from PTO tech
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3. Replace the Drain Plug Bolt and 5. Install the cleaned Apron Plate (26) Drain Plug Washer (69). Replace and Foam Air Filter (27). Secure the the washer, if damaged. Tighten the Air Filter Cover (28) with the two Bolts plug. (See Figure F.) (29) before use. (See Figure G.) 4. Refill the oil to the proper level follow- Spark Plug Maintenance ing the instructions under the “Start- 1. Disconnect Spark Plug Wire from end ing the engine” section. of the Spark Plug. Clean out debris Air Fi
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Storage INSPEc TION, MAINTENANc E, ANd cLEANING ScHEduLE 1. Wait for Engine to cool, then wipe Engine with clean cloth. Note: This maintenance schedule is in- tended solely as a general guide. If 2. When the Engine is to remain idle performance decreases or if Engine for longer than 20 days, prepare the operates unusually, check systems Engine for storage as follows: immediately. The maintenance a. Change engine oil and empty Fuel needs of each part of the Engine will Tank (96). diff
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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. IN
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Troubleshooting Problem Possible cause Possible Solution FUEL RELATED: FUEL RELATED: Engine will not 1. No fuel in tank or fuel valve closed. 1. Fill fuel tank and open fuel valve. start 2. Choke not in start position, 2. Move choke to start position if engine especially with cold engine. is cold. 3. Low quality or deteriorated, old 3. Use only fresh 89+ octane unleaded gasoline. gasoline. 4. Carburetor not primed. 4. Prime carburetor by pressing priming bulb specified number of times (if
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Troubleshooting Problem Possible cause Possible Solution 1. Spark plug wire loose. 1. Check wire connections. Engine misfires 2. Incorrect spark plug gap or 2. Re-gap or replace spark plug. damaged spark plug. 3. Defective spark plug wire. 3. Replace spark plug wire. 4. Old or low quality gasoline. 4. Use only fresh 89+ octane unleaded gasoline. 5. Incorrect compression. 5. Diagnose and repair compression. (Use Engine will not start: cOMPRESSION RELATEd section.) 1. Low oil shutdown. 1. Fill
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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. Page 17
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ASSEMBLY dIAGRAM SKU 97964 For technical questions, please call 1-800-444-3353. Page 18
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the purchase price if we cannot readily LIMITEd 1 YEAR / 90 dAY and quickly provide you with a replace- wARRANTY ment. We will return repaired products at our expense, but if we determine there is Harbor Freight Tools Co. makes ev- no defect, or that the defect resulted from ery effort to assure that its products meet causes not within the scope of our warran- high quality and durability standards, and ty, then you must bear the cost of returning warrants to the original purchaser that
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Owner’s warranty Responsibilities 5. Service and Maintenance • As the engine owner, you are responsible for the performance Component parts which are not scheduled for replacement of the required maintenance listed in your Owner’s Manual. as required maintenance or are scheduled only for regular HFT recommends that you retain all receipts covering main- inspection to the effect of “repair or replace as necessary” tenance on your engine, but HFT cannot deny warranty are warranted for the warr
