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Visit our website at: http://www.harborfreight.com

Email our technical support at: predator@harborfreight.com

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.

Owner’s Manual & Safety Instructions

Save This Manual

 

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.

When unpacking, make sure that the product is intact 

and undamaged.  If any parts are missing or broken, 

please call 1-888-866-5797 as soon as possible.

Copyright

©

 2012 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.  

Tools required for assembly and service may not be included.

Read this material before using this product. 

Failure to do so can result in serious injury. 

SAVE THIS MANUAL.

REV 15a

Summary of Contents for 79cc

Page 1: ...onth and year of purchase if product has no number Keep this manual and the receipt in a safe and dry place for future reference When unpacking make sure that the product is intact and undamaged If an...

Page 2: ...M 3600 RPM Compression Ratio 8 5 1 Bore x Stroke 52 mm x 37 mm 2 0 IN x 1 5 IN Fuel Type 87 octane stabilizer treated unleaded gasoline Engine Oil Capacity 0 37 Quart 0 35 L Fuel Tank Capacity 0 53 Ga...

Page 3: ...e Injury Wear ANSI approved safety goggles with side shields Read the manual before set up and or use WARNING marking concerning Risk of Hearing Loss Wear hearing protection Symbol Property or Stateme...

Page 4: ...ngine 8 Secure the Engine on transport vehicles to prevent the tool from rolling slipping and tilting 9 Industrial applications must follow OSHA requirements 10 Do not leave the equipment unattended w...

Page 5: ...se for which it is not intended Service Precautions 1 Before service maintenance or cleaning a Turn the engine switch to its OFF position b Allow the engine to completely cool c Then remove the spark...

Page 6: ...this product The emission control system for this Engine is warranted for standards set by the U S Environmental Protection Agency For warranty information refer to the last pages of this manual WARNI...

Page 7: ...l questions please call 1 888 866 5797 ITEM 69733 Safety Operation Maintenance Setup Engine Controls Starter Handle Oil Drain Plug Serial Number Location Air Filter Muffler Choke Fuel Cap Throttle Dip...

Page 8: ...in the Service section shows other viscosities to use in different average temperatures 6 Thread the dipstick back in clockwise NOTICE Do not run the engine with too little oil The engine will be perm...

Page 9: ...Throttle when the tool is so equipped 3 Turn the Engine Switch on 4 Grip the Starter Handle of the Engine loosely and pull it slowly several times to allow the gasoline to flow into the Engine s carbu...

Page 10: ...ast about 3 hours of use During this period Do not apply a heavy load to the equipment Do not operate the engine at its maximum speed c The maintenance break in period will last about 20 hours of use...

Page 11: ...stead Cleaning Maintenance and Lubrication Schedule Note This maintenance schedule is intended solely as a general guide If performance decreases or if equipment operates unusually check systems immed...

Page 12: ...e a drain pan not included underneath the crankcase s drain plug 4 Remove the drain plug and if possible tilt the crankcase slightly to help drain the oil out Recycle used oil 5 Replace the drain plug...

Page 13: ...adually enter the Engine and cause rust damage Apply a thin coat of rust preventive oil to all metal parts 2 FUEL To protect the fuel tank during storage fill the tank with gasoline that has been trea...

Page 14: ...chamber with screwdriver handle 8 Turn Choke to RUN position Remove spark plug and pull the start handle several times to air out the chamber Reinstall spark plug and set Choke to CHOKE position 9 Re...

Page 15: ...ne Do not use gasoline with more than 10 ethanol E15 E20 E85 etc 3 Test replace fuel tank cap 4 Have qualified technician service magneto 5 Secure spark plug cap Engine stops when under heavy load 1 D...

Page 16: ...explain the emission control system warranty on your 2014 2015 Small Off Road Engine herein engine Within the United States new off road spark ignition engines certified for model year 2014 2015 must...

Page 17: ...lterations by changing adding to or removing parts from the engine 5 Service and Maintenance Component parts which are not scheduled for replacement as required maintenance or are scheduled only for r...

Page 18: ...te Subassembly Lifter Stopper 1 45 Bolt Valve Adjusting 2 Part Description Qty 46 Rocker Valve 2 47 Nut Valve Adjusting 2 48 Nut Valve Lock 2 49 Starter Assy Recoil 1 50 Bolt 3 51 Shroud 1 52 Bolt 4 5...

Page 19: ...13 16 15 14 20 19 18 21 25 88 87 87 86 83 82 85 84 64 64 63 59 59 61 60 62 55 54 53 56 51 52 52 52 52 57 58 49 50 50 50 76 77 78 79 80 80 81 38 40 42 43 44 45 46 47 42 43 45 46 47 48 39 40 41 41 48 3...

Page 20: ...ole Diagram Note Not to scale 1 in 25 5mm 2 42 in 61 5mm 4 02 in 102mm 1 44 in 36 5mm Power Take Off Diagram Note Not to scale 0 98 in 25mm 1 79 in 45 5mm 2 37 in 60 1mm 5 16 24UNF 0 1875 in 4 76mm 0...

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