OPERATOR’S MANUAL GENERAC® TRIMMER/MOWER™ Models: 6.75, 7.25, 8.75, 8.75 Self-Propelled Serial No. Order No. Original Language Read and understand this manual and all instructions before operating the TRIMMER/MOWER.
Table of Contents Chapter 1: General Safety Rules............................................................................................................................................................ 3 Chapter 2: Setting Up The TRIMMER/MOWER................................................................................................................................... 6 Chapter 3: Operating The TRIMMER/MOWER ............................................................................................
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. Labels Your TRIMMER/MOWER carries prominent labels as reminders for its proper and safe use.
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: Never allow people who are unfamiliar with these instructions to use the TRIMMER/MOWER.
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.
Chapter 2: Setting Up The TRIMMER/MOWER It may be helpful to familiarize yourself with the controls and features of your TRIMMER/MOWER as shown in Figure 1 before beginning these procedures. If you have any questions at all, please feel free to contact us at 1-888-545-6576. TRIMMER/MOWER Controls and Features Variable Speed Drive Engage Bar Trimmer Head Engage Bar Trimmer Head Engage Bar Key Switch 8.75 Self-Propelled Controls Throttle Control Lever (opposite side on 6.75/7.
Specifications 6.75 Briggs and Stratton 6.75 EXi Manual Start or 6.75 Quantum Electric Start. See Engine Owners Manual for details 7.25 Briggs and Stratton 7.25 EXi Manual Start or 7.25 Quantum Electric Start. See Engine Owners Manual for details 8.75 Briggs and Stratton 8.75 Manual or Electric Start. See Engine Owners Manual for details 8.75 SP Briggs and Stratton 8.75 Electric Start.
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 and Washer 1. Remove the 3/8-16 Locknut and washer from the end of the axle with a 9/16" Wrench (Figure 2). Note: There is also a 1/2" Washer on the Axle. Keep this Washer on the Axle when you install the Wheel. It is a Spacer between the Wheel and the machine. Plastic Hub Wheel 2.
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. 1. Insert the ends of the Cords into the side openings in the Line Plate (Figure 5). 2. Push the Cord through until the ends come out the center hole in the Line Plate. Adjust the Cords so the tips are even. 3.
Adding Oil and Gasoline Note: Refer to the Engine Manufacturers Manual for more detailed Engine information. Tip: To avoid confusion, we recommend leaving the caps ON the Fuel and Oil Fills until you are ready to pour either gasoline or oil into the correct Fill. Note: You will need approximately 15 to 22 ounces of SAE 30 high detergent oil depending on Engine type. Use only SAE 30 high detergent oil classified “For Service SF, SG, SH, SJ” or higher. Do not use special additives.
Chapter 3: Operating the TRIMMER/MOWER The design of your machine is for trimming and mowing grass, weeds, and other growth as specified in this manual. Do not use it for any other purpose as it could cause serious injury. Contact with internal rotating parts will cause serious personal injury. Never put hands, face, feet, or clothing under the mower deck or discharge opening at any time.
Key Switch Electric Starting Note: Use the following steps with Electric-Starting models only. 1. Push the Throttle Control Lever all the way forward to the Run (Figure 12). Throttle Control Lever position Note: The 8.75 models do not have a Choke or Primer Bulb. Step 2 can be ignored. Recoil Starter Handle 2. For 6.75 Electric Start models only, push the Primer Bulb in and completely release it, lifting your finger and letting it pop back to its original position. Repeat three to four times. For 7.
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 will travel. The machine will continue to move forward until you release the Bar. Handlebar 2. Push the Trimmer forward a little after releasing the Wheel Drive Engage Bar. This unlocks the Wheel Transmission Clutches so you can pull the Trimmer back easily.
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: If you buy Cutting Cord in rolls, cut it in 25" lengths. Cut them at an angle so they will be easier to install.
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. Do not run the machine over gravel driveways or over loose stones or mulch with the trimmer head spinning. Tip: The TRIMMER/MOWER discharges cut material to the right.
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. You can also mow wet areas such as ditches and around ponds (Figure 22). Note: NEVER mow in the rain. Water on the Spark Plug may cause the Engine to stall.
Chapter 4: Maintaining The TRIMMER/MOWER Regular maintenance is the way to ensure the best performance and long life of your machine. Please refer to this manual and the engine manufacturer's owner's manual for maintenance procedures. Service intervals listed in the checklist below supersede those listed in the engine manufacturer's owner's manual. Before performing any maintenance procedure or inspection, stop the engine, wait five minutes to allow all parts to cool.
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" Socket can be used on the Bolt (inside the bottom of the Mow-Ball) to loosen it. You may need to clean grass or debris out of the recess first. 5.
Replacing the Trimmer Head Belt (non Self Propelled models) Tools and Parts needed: 3/8" Wrench 7/16" Wrench 9/16" Wrench V Belt: 3L440 (Gates #6744) Bolts and Flat Washers Trimmer Cord Trimmer Guard 1. Tip the machine back to access the underside (Figure 25). 2. Remove the Trimmer Cords from the Head Assembly. 3. Remove the four Trimmer Guard Bolts and Flat Washers with a 3/8" Wrench. Remove the Trimmer Guard. 4.
Bolts and Flat Washers Trimmer Cord Replacing the Trimmer Head Belt (Self Propelled model) Tools and Parts needed: 3/8" Wrench 7/16" Wrench 9/16" Wrench Philips Head Screwdriver V Belt: 3L440 (Gates #6744) Trimmer Guard 1. Tip the machine back onto the handlebar to access the underside (Figure 28). Figure 28 2. Remove the Trimmer Cords from the Head Assembly. 3. Remove the four Trimmer Guard Bolts and Flat Washers with a 3/8" Wrench. Remove the Trimmer Guard. 4.
14. Install the small Spacer and flat Idler Pulley (Figure 32). Make sure you place the Belt correctly between the Idler Pulley, Bracket Tab, and Guide Pin. The Belt must be installed on the inside of the guide Pin as shown in figure 32. If it is not installed on the inside the Trimmer Head will not function correctly. 15. Rotate the Washer Plate onto the Flat Groove Idler Stud and install the Locknut using a 9/16" Wrench (Figure 30). Tighten the “V” Groove Idler Locknut using a 9/16" Wrench.
Bolts and Flat Washers Trimmer Cord Trimmer Guard Replacing the Drive Belt (Self Propelled model) Tools and Parts needed: 3/8" Wrench Two 7/16" Wrenches Philips Head Screwdriver V Belt: 3L130 1. Tip the machine back onto the handlebar to access the underside. 2. Remove the Trimmer Cords from the Head Assembly. Figure 33 3. Remove the four Trimmer Guard Bolts and Flat Washers with a 3/8" Wrench. Remove the Trimmer Guard (Figure 33). 4.
Note: Ensure that the Drive Cable does not kink or get over stressed during the following procedure. Drive Belt Transmission Pulley Loosen Loosen 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. 11. Continue to rotate the Transmission to gain access to the Belt retainers and Screws on the bottom of the Transmission (Figure 38). 12.
Changing the Engine Oil Tools and Supplies needed: SAE 30 HD Oil (refer to your Engine Owner’s Manual for quantity required) Suitable container for used oil Rags Wooden pallet or workbench Fuel Fill Cap Oil Cap/Dipstick Approved Container Note: The Briggs and Stratton 6.75 EXi and 7.25 EXi Engines do not require a regular Oil Change. Check the Engine Oil before each use and add Oil as needed. Refer to the Engine Manufacturers Manual for more detailed Engine information.
Adjusting the Transmission Belt Tension through the Drive Control Cable Threaded Cable End 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. The Adjustment Jam Nuts are located at the upper end of the Drive Cable itself. Loosen Cable Direction 1. Locate the end of the Drive Cable along the right Handlebar.
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. Typically, the Battery takes between 6 and 8 hours to fully charge. Do not leave the charger on the battery longer than 24 hours for a 2 amp charger, or 48 hours for a 1 amp charger as you could potentially damage the battery..
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. Troubleshooting Table SYMPTOM Recoil will not pull out or is difficult to pull.
Troubleshooting Table (Continued) SYMPTOM The Engine won’t start using Electric-Start. (Please refer to the Engine Owner’s manual for Engine-specific procedures.) The Engine lacks power or is not running smoothly. (Please refer to the Engine Owner’s Manual for Engine-specific procedures.) POSSIBLE CAUSE Check all of the items under the section called Electric Starting on page 12 and the previous section on Manual Starting.
Troubleshooting Table (Continued) SYMPTOM The cutting Cords are difficult to install. POSSIBLE CAUSE The Cords may be dry. Soak them in a bucket of water for a few days before installing. The ends are too flat. Trim the ends of the Cord at an angle The cutting Cords are breaking. The Cords may be too dry. Store Cords in a plastic bag with a damp sponge or cloth to make them less prone to breaking or soak them in a bucket of water for a few days. You may be trying to do too much too fast.
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 1 2 Frame W/ Labels, TR4 Kit, Engine, B&S, 6.75 EXi, M/S Engine w/Labels, B&S, 6.75, E/S Kit, Engine, B&S, 7.25 EXi, M/S Engine w/Labels, B&S, 7.25, E/S Engine w/Labels, B&S, 8.75, M/S Engine w/Labels, B&S, 8.75, E/S Screw, 3/8-16 X 1.5" Washer, Lock, 3/8", Split Guard, Debris Screw, HWH, 1/4-20 X .
Schematic – Main Frame Assembly CONTACT US AT 1-888-545-6576 31
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 1 2 3 Axle, Welded Screw, HWH, 1/4-20 X .75", Taptite Wheel, 14", 5 Spoke (6.75 Only) Wheel, 16", 5 Spoke Nut, Nylon Lock, 7/16-20, LP Handlebar, Upper (6.75 Only) Handlebar W/Grip, Upper, Ergonomic Handlebar, Lower Bail Bar, Straight (6.
Schematic – Handlebar and Axle Assembly (Non Self Propelled Model) (17, 18, 19, 20) on opposite side for 8.
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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Drivetrain Assembly Screw, HWH, 1/4-20 X .75", Taptite Cover, Bottom, Self Propel Washer, Flat, 1/4", USS Wheel, 14", 5 Spoke, D Bore Washer, Flat, .510" X .875" X .
Schematic – Handlebar and Axle Assembly (Self Propelled Model) CONTACT US AT 1-888-545-6576 35
Parts List – Drive train Assembly (Self Propelled Model) Note: Part numbers listed are available through Generac Power Systems. Ref# Part# Description Ref# Part# Description 1 2 3 4 5 6 7 8 9 10 11 Support, Drive, Self Propel Bearing Sleeve, 1/2" X 3/4" X 3/4" Axle, LH, Self Propel Retaining Ring, .468" ID. Key, Woodruff, 1/8" X 1/2" Sprocket, #35, 40 Tooth, 2 Hub Washer, Flat, .510" X .875" X .
Schematic – Drive train Assembly (Self Propelled Model) CONTACT US AT 1-888-545-6576 37
Notes: 38 GENERAC® TRIMMER/MOWER
GENERAC® TRIMMER/MOWER 2-Year Limited Warranty Terms and Conditions The GENERAC TRIMMER/MOWER is warranted for two (2) years against defects in materials or workmanship when put to ordinary and normal consumer use; ninety (90) days for any other use. For the purposes of all the above warranties, “ordinary and normal consumer use” refers to non-commercial residential use and does not include misuse, accidents or damage due to inadequate maintenance.
Daily Checklist for the TRIMMER/MOWER To help maintain your TRIMMER/MOWER for optimum performance, we recommend you follow this checklist each time you use your machine. 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.
