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Generac Power Systems 6.75 Operator's Manual

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OPERATOR'S MANUAL
®
GENERAC
Models: 6.75, 7.25, 8.75, 8.75 Self-Propelled
Serial No.
Order No.
Read and understand this manual and all instructions before operating the TRIMMER/MOWER.
TRIMMER/MOWER™
Original Language
Generac Power Systems
Toll-free phone: 1-888-545-6576

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Summary of Contents for Generac Power Systems 6.75

  • Page 1 OPERATOR’S MANUAL ® GENERAC TRIMMER/MOWER™ Models: 6.75, 7.25, 8.75, 8.75 Self-Propelled Serial No. Generac Power Systems Original Language Order No. Toll-free phone: 1-888-545-6576 Read and understand this manual and all instructions before operating the TRIMMER/MOWER.

  • Page 2: Table Of Contents

    Additional Information and Potential Changes Generac Power Systems reserves the right to discontinue, change, and improve its products at any time without notice or obligation to the purchaser. The descriptions and specifications contained in this manual were in effect at printing. Equipment described within this manual may be optional.

  • Page 3: Chapter 1: General Safety Rules

    Chapter 1: General Safety Rules Read this safety & operating Instructions manual before you use the TRIMMER/MOWER. Become familiar with the operation and service recommendations to ensure the best performance from your machine. If you have any questions or need assistance, please contact us at 1-888-545-6576 and one of our Technical Support Representatives will be happy to help you.

  • Page 4: Operating The Mower Safely

    Operating the Mower Safely This is a high-powered machine, with moving parts operating with high energy at high speeds. You must operate the machine safely. Unsafe operation can create a number of hazards for you, as well as anyone else in the nearby area. Always take the following precautions when using this machine: ...
  • Page 5 Safety with Gasoline - Powered Machines Gasoline is a highly flammable liquid. Gasoline also gives off flammable vapor that can be easily ignited and cause a fire or explosion. Never overlook the hazards of gasoline. Always follow these precautions:  Never run the engine in an enclosed area or without proper ventilation as the exhaust from the engine contains carbon monoxide, which is an odorless, tasteless, and deadly poisonous gas.

  • Page 6: Chapter 2: Setting Up The Trimmer/Mower

    Engage Bar Key Switch 8.75 Self-Propelled Controls Throttle Control Lever (opposite side on 6.75/7.25 models) Recoil Starter Fuel Fill (opposite side on Oil Fill (opposite side on 6.75/7.25 Electric Start 6.75/7.25 Electric Start models) models) Handlebar Adjuster ® Mow-Ball Trimmer Guard...
  • Page 7 8.75 8.75 SP Engine Briggs and Stratton Briggs and Stratton Briggs and Stratton Briggs and Stratton 6.75 EXi Manual Start 7.25 EXi Manual Start 8.75 Manual or 8.75 Electric Start. or 6.75 Quantum or 7.25 Quantum Electric Start. See Engine Owners Electric Start.
  • Page 8 FOR PROPER SETUP OF YOUR NEW TRIMMER/MOWER PERFORM ALL THE FOLLOWING STEPS IN THIS CHAPTER. Installing the Wheels (Self Propelled Models Only) Tool needed:  9/16" Wrench Locknut 1. Remove the 3/8-16 Locknut and washer from the end of the axle with a 9/16" Washer Wrench (Figure 2).
  • Page 9 Installing the Cutting Cords Side Openings There are two installation points on each Line Plate. Each point is 180 degrees apart. Always install two Cords, one opposite the other at the same height. Note: Soaking the Cutting Cords and trimming the ends at an angle will make installation easier.
  • Page 10 - the machine should be on a level surface. - the dipstick should be screwed down to ensure an accurate oil level reading. Note: The Fuel and Oil Fills on the 6.75 and 7.25 Electric Start models are on Fuel Fill opposite sides from what is shown in figure 8.

  • Page 11: Chapter 3: Operating The Trimmer/Mower

    1. Push the Throttle Control Lever all the way forward to the Run position (Figure 10). Note: The 6.75 EXi, 7.25 EXi, and 8.75 models do not have a Choke or Primer Bulb. Step 2 can be ignored. Choke Lever 2.

  • Page 12: Engaging The Trimmer Head

    Lever Note: The 8.75 models do not have a Choke or Primer Bulb. Step 2 can be ignored. 2. For 6.75 Electric Start models only, push the Primer Bulb in and completely Recoil Starter release it, lifting your finger and letting it pop back to its original position.

  • Page 13: Setting The Cutting Height

    Engaging the Self Propel Wheel Drive Wheel Drive Engage Bar 1. Bring the Wheel Drive Engage Bar toward you and the Handlebar (Figure 15). The closer to the Handlebar you move the Bar the faster the machine Handlebar will travel. The machine will continue to move forward until you release the Bar.
  • Page 14 Cord Tips We ship two thicknesses of Cutting Cord with your TRIMMER/MOWER. The Cords are Blue (175-mil) and Green (155-mil). Because conditions and vegetation vary so much, you should experiment with Cord weights (diameters) to determine what works best for your particular mowing and trimming situations. Here are a few things to keep in mind: ...
  • Page 15 Obstacles Dealing with obstacles in the terrain is easy with your new TRIMMER/MOWER. The following section explains how to approach most common obstacles. The trimmer engine's power can easily throw stones, sticks, and other debris at great velocity, which could cause personal injury or property damage.
  • Page 16 Wet Conditions Make sure of your footing when operating in wet conditions. Because there is no housing to restrict the flow of cut material, you can also use your TRIMMER/MOWER to mow wet or heavy growth. You can use the TRIMMER/MOWER in damp conditions, after a rain, or in the early morning dew without clogging or stalling.

  • Page 17: Chapter 4: Maintaining The Trimmer/Mower

    Lubricate Throttle Cable, Self Propel Cable and Trimmer Control Cable with  SAE 30 Oil. Change the Engine Oil (excluding 6.75 EXi and 7.25 EXi models) time 5  Replace the Engine Air Filter Cartridge and foam Pre Filter if equipped.
  • Page 18 ® 4. Looking down at the top of the Frame, turn the Mow-Ball clockwise until it unscrews completely from the Bearing Housing. ® Note: If the Mow-Ball continues to turn, but does not come off, check to be sure that you locked the Screwdriver into the shaft. If the Mow-Ball will not turn by hand a 9/16"...
  • Page 19 Replacing the Trimmer Head Belt (non Self Propelled models) Bolts and Flat Trimmer Cord Tools and Parts needed: Washers  3/8" Wrench  7/16" Wrench Trimmer  Guard 9/16" Wrench  V Belt: 3L440 (Gates #6744) 1. Tip the machine back to access the underside (Figure 25). 2.
  • Page 20 Replacing the Trimmer Head Belt (Self Propelled model) Bolts and Flat Trimmer Cord Washers Tools and Parts needed: Trimmer  3/8" Wrench Guard  7/16" Wrench  9/16" Wrench  Philips Head Screwdriver  V Belt: 3L440 (Gates #6744) 1. Tip the machine back onto the handlebar to access the underside (Figure 28).
  • Page 21 14. Install the small Spacer and flat Idler Pulley (Figure 32). Make sure you Guide Pin Belt place the Belt correctly between the Idler Pulley, Bracket Tab, and Guide Pin. Flat Groove Bracket Tab Idler Pulley “V” Groove The Belt must be installed on the inside of the guide Pin as shown in figure Idler Pulley 32.
  • Page 22 Replacing the Drive Belt (Self Propelled model) Bolts and Flat Trimmer Cord Washers Tools and Parts needed: Trimmer  3/8" Wrench Guard  Two 7/16" Wrenches  Philips Head Screwdriver  V Belt: 3L130 1. Tip the machine back onto the handlebar to access the underside. 2.
  • Page 23 Note: Ensure that the Drive Cable does not kink or get over stressed during the Drive Belt Transmission Pulley following procedure. The Belt Guide will interfere with the Transmission Housing and Belt when the Transmission is rotated. The Belt can be repositioned and the Belt Guide can be moved out of the way slightly as needed.
  • Page 24 Rags  Wooden pallet or workbench Note: The Briggs and Stratton 6.75 EXi and 7.25 EXi Engines do not require a Fuel Fill Cap Oil Cap/Dipstick regular Oil Change. Check the Engine Oil before each use and add Oil as needed.

  • Page 25: Charging The Battery

    Adjusting the Transmission Belt Tension through the Drive Control Threaded Cable End Cable Jam Nuts The Drive Belt will stretch a little when new, then more over time. If the Trimmer does not move forward with the Wheel engagement Bar engaged, adjust the Trimmer Drive Cable to put more tension on it.
  • Page 26 4. Attach the Black (-) alligator clipped wire from the Charger Adapter to the Negative (-) terminal of the Battery, then attach the Red (+) alligator clipped wire to the Positive (+) Battery terminal. 5. Plug the Charger into a standard wall outlet. ...

  • Page 27: Chapter 5: Troubleshooting

    Chapter 5: Troubleshooting Most problems are easy to fix. Consult the Troubleshooting Table below for common problems and their solutions. If you continue to experience problems, contact us at 1-888-545-6576 for support. Before performing any maintenance procedure or inspection, stop the engine, wait five (5) minutes to allow all parts to cool. Disconnect the spark plug wire, keeping it away from the spark plug.
  • Page 28 Troubleshooting Table (Continued) YMPTOM OSSIBLE AUSE  Check all of the items under the section called Electric Starting on page 12 and the previous The Engine won’t start using Electric-Start. section on Manual Starting.  Check the wire connections - especially the ground connection, the large black wire coming (Please refer to the from the Battery, where it connects to the Engine.
  • Page 29 Troubleshooting Table (Continued) YMPTOM OSSIBLE AUSE  The Cords may be dry. Soak them in a bucket of water for a few days before installing. The cutting Cords are difficult to install.  The ends are too flat. Trim the ends of the Cord at an angle ...

  • Page 30: Chapter 6: Parts Lists And Schematic Diagrams

    Chapter 6: Parts Lists and Schematic Diagrams Parts List – Main Frame Assembly Note: Part numbers listed are available through Generac Power Systems. Ref# Part# Description Ref# Part# Description 31130 Frame W/ Labels, TR4 11075 Nut, Nylon Lock, 3/8-16, ZP 36979 Kit, Engine, B&S, 6.75 EXi, M/S...

  • Page 31: Manual

    Schematic – Main Frame Assembly CONTACT US AT 1-888-545-6576...

  • Page 32: Manual

    Parts List – Handlebar and Axle Assembly (Non Self Propelled) Note: Part numbers listed are available through Generac Power Systems. Ref# Part# Description Ref# Part# Description 31107 Axle, Welded 31112 Knob, 2.25" Dia, 5/16-18 Insert 31117 Screw, HWH, 1/4-20 X .75", Taptite...

  • Page 33: Manual

    Schematic – Handlebar and Axle Assembly (Non Self Propelled Model) (17, 18, 19, 20) on opposite side for 8.75 Model CONTACT US AT 1-888-545-6576...

  • Page 34: Manual

    Parts List – Handlebar and Axle Assembly (Self Propelled Model) Note: Part numbers listed are available through Generac Power Systems. Ref# Part# Description Ref# Part# Description 32339 Drivetrain Assembly 32169 Bail Bar, Ergonomic, LH Half 31117 Screw, HWH, 1/4-20 X .75", Taptite...

  • Page 35: Manual

    Schematic – Handlebar and Axle Assembly (Self Propelled Model) CONTACT US AT 1-888-545-6576...

  • Page 36: Manual

    Parts List – Drive train Assembly (Self Propelled Model) Note: Part numbers listed are available through Generac Power Systems. Ref# Part# Description Ref# Part# Description 32162 Support, Drive, Self Propel 32168 Chain, #35, 51 Link & Master 32167 Bearing Sleeve, 1/2" X 3/4" X 3/4"...

  • Page 37: Manual

    Schematic – Drive train Assembly (Self Propelled Model) CONTACT US AT 1-888-545-6576...

  • Page 38: Manual

    Notes: ® GENERAC TRIMMER/MOWER...

  • Page 39: Manual

    TRIMMER/MOWER is fit for ordinary purposes for which a product of this type is used. Generac Power Systems however, limits the implied warranties of merchantability and fitness in duration to a period of two (2) years in consumer use, ninety (90) days for any other use.

  • Page 40: Manual

    7 5 M E I G S R O A D , P . O . B O X 2 5 , V E R G E N N E S , V E R M O N T 0 5 4 9 1 ©2016 Generac Power Systems, Inc. All rights reserved...

This manual is also suitable for:

8.757.25

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