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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 

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. 

SAVE THIS MANuAL.

Copyright

©

 2008 by Harbor Freight Tools

®

.  All rights reserved.  No portion of this manual or any artwork 

contained herein may be reproduced in any shape or form without the express written consent of Harbor 

Freight Tools.  Diagrams within this manual may not be drawn proportionally.  Due to continuing improvements, 

actual product may differ slightly from the product described herein.

For technical questions or replacement parts, please call 1-800-444-3353.

Manual Revised 09i

Summary of Contents for 97954

Page 1: ...rfreight com Read this material before using this product Failure to do so can result in serious injury Save this manual Copyright 2008 by Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools Diagrams within this manual may not be drawn proportionally Due...

Page 2: ...reak in Period 9 Technical Specifications 10 Servicing 10 Maintenance Procedures 10 Engine Oil Change 10 Air Filter Element Maintenance 11 Spark Plug Maintenance 11 Inspection maintenance and cleaning schedule 12 After Initial 20 Operation Hour Period 12 Every 25 Operation Hours Thereafter 12 Every 50 Operation Hours 12 Every 100 Operation Hours 12 Every 300 Operation Hours 12 Storage 12 Troublesh...

Page 3: ...ndicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE is used to address practices not related to personal injury CAUTION without the safety alert symbol is used to address practices not related to personal injury WARNING Read all instructions Failure to follow all instructions listed below may result in fire serious injury and or DEATH The warnings an...

Page 4: ...ectromagnetic fields in close proximity to a heart pacemaker could cause pacemaker interference or pacemaker failure Caution is neces sary when near the engine s magneto or recoil starter Use only accessories that are recom 6 mended by Harbor Freight Tools for your model Accessories that may be suitable for one Engine may become hazardous when used on another piece of Engine Do not operate in expl...

Page 5: ... have the Engine ser viced before using Many accidents are caused by poorly maintained engines Use the correct Engine for the appli 20 cation Do not modify the Engine and do not use the Engine for a purpose for which it is not intended Service precautions Before service maintenance or 1 cleaning Turn the Power Switch 94 to its a OFF position Allow the Engine to completely b cool Then remove the Sp...

Page 6: ...California Air Resources Board also known as CARB For warranty information refer to the last pages of this manual At high altitudes the Engine s car buretor 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 de vices used with this product Unpacking When...

Page 7: ... the Engine on a 2 sturdy equipment surface capable of supporting the weight of the Engine and the equipment itself The equipment to which the Engine 3 will be attached must have matching bolt hole patterns and be attached using the proper size bolts not in cluded Operating Instructions Read the entire Important Safety Information section at the beginning of this manual including all text under su...

Page 8: ... 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 CAP 96 FUEL TANK 96 FUEL TANK FILTER 96 1 To fill the Fuel Tank 96 first wipe off the Fuel Tank Cap 96 and the sur rounding area See ...

Page 9: ... pull slowly until resistance is felt While holding the Handle allow the Starter Rope to rewind slowly Then pull the Starter Handle with a rapid full arm stroke Repeat as necessary until the Engine starts See Figure E After the Engine starts and warms 5 up slowly move the Choke Lever to its RUN position Then adjust the Throttle 64 to the desired Engine speed RPM See Figure E IMPORTANT Allow the En...

Page 10: ...Page 10 SKU 97964 For technical questions please call 1 800 444 3353 REV 08e 08h 2 9 16 65mm Hole Distance 2 31 64 63mm Hole Distance 4 3 32 104mm Hole Distance ...

Page 11: ...e performing any inspection maintenance or cleaning procedures To prevent serious injury from equipment failure Do not use a damaged Engine If abnormal noise vibration or excess smoking occurs have the problem corrected before further use Maintenance Procedures Many maintenance procedures including those not detailed in this manual will need to be performed by a qualified technician for safety If ...

Page 12: ...the excess oil See Figure G Install the cleaned Apron Plate 26 5 and Foam Air Filter 27 Secure the Air Filter Cover 28 with the two Bolts 29 before use See Figure G Spark Plug Maintenance Disconnect Spark Plug Wire from end 1 of the Spark Plug Clean out debris from around Spark Plug Using the provided Spark Plug 2 Wrench remove the Spark Plug Inspect the Spark Plug 3 If the electrode is oily clean...

Page 13: ...it for Engine to cool then wipe 1 Engine with clean cloth When the Engine is to remain idle 2 for longer than 20 days prepare the Engine for storage as follows Change engine oil and empty Fuel a Tank 96 Either leave Fuel Tank 96 empty or b refill Fuel Tank with fresh unleaded gasoline mixed with a fuel stabilizer intended for long term Engine stor age not included After filling run Engine for abou...

Page 14: ...y 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 fact the manufacturer and or distributor expressly states that all repairs and parts replacements should be undertaken by certified and licensed technicians and not by the buyer The buyer assumes all risk and liab...

Page 15: ...l spark plug and set choke to start position Ignition spark Related Spark plug wire not connected 1 securely Spark plug electrode wet or dirty 2 Incorrect spark plug gap 3 Spark plug wire or spark plug 4 broken Incorrect spark timing or faulty 5 ignition system Ignition spark Related Connect spark plug wire properly 1 Clean spark plug 2 Correct spark plug gap 3 Replace spark plug wire and or spark...

Page 16: ...Engine knocks Old or low quality gasoline 1 Engine overloaded 2 Incorrect spark timing deposit 3 buildup worn engine or other mechanical problems Fill fuel tank with fresh 89 octane 1 unleaded gasoline Do not exceed equipment s load 2 rating Have qualified technician diagnose 3 and service engine Engine backfires Impure or low quality gasoline 1 Engine too cold 2 Choke not open after engine 3 warm...

Page 17: ...e 17 SKU 97964 For technical questions please call 1 800 444 3353 PARTS LIST MUFFLER FAN COVER DIPSTICK CASE COVER BOLT POWER SWITCH THROTTLE CARBURETOR W CHOKE CARBURETOR SPACER EXHAUST VALVE INTAKE VALVE ...

Page 18: ...Page 18 SKU 97964 For technical questions please call 1 800 444 3353 ASSEMBLY DIAGRAM ...

Page 19: ...epaired products at our expense but if we determine there is no defect or that the defect resulted from causes not within the scope of our warran ty then you must bear the cost of returning the product This warranty gives you specific legal rights and you may also have other rights which vary from state to state 3491 Mission Oaks Blvd PO Box 6009 Camarillo CA 93011 800 444 3353 Emission Control Sy...

Page 20: ...e filed in accordance with the provi sions of the HFT warranty policy explained in the box at the top of the previous page HFT shall not be liable for any loss of use of the engine for any alternative usage for any damage to goods loss of time or inconvenience Warranty coverage shall also be excluded for any part which fails malfunctions or is damaged due to failure to follow the maintenance and o...

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