Bad Boy MZ 42 Owner's, Service & Parts Manual
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Bad Boy MZ 42 Owner's, Service & Parts Manual

Zero-turn mower
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See also: Owner's Manual
MZ 42
ZERO-TURN MOWER
OWNER'S, SERVICE & PARTS MANUAL
For additional information, please see us at
www.badboymowers.com
MODELS
Bad Boy, Inc.
102 Industrial Drive
Batesville, Arkansas 72501
©2015 11-13

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Summary of Contents for Bad Boy MZ 42

  • Page 1 MZ 42 MODELS ZERO-TURN MOWER OWNER’S, SERVICE & PARTS MANUAL For additional information, please see us at www.badboymowers.com Bad Boy, Inc. 102 Industrial Drive Batesville, Arkansas 72501 ©2015 11-13...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Basic Information ....................Section 1 (pages 4) Bad Boy Safety Guidelines ................Section 2 (pages 5–8) Operation ......................Section 3 (pages 9) Maintenance ...................... Section 4 (page 10) Storage and Transportation ................Section 5 (page 10) Troubleshooting and FAQ ................. Section 6 (pages 12) Controls ......................
  • Page 3 Briggs Engine 540 CC Kohler Engine Air Filter 063-5002-00 063-5003-00 063-4026-00 (Pre-Cleaner) (Element) Briggs Engine 540 CC Kohler Engine Fuel Filter 063-6000-00 063-5001-00 Spark Plug 015-8000-00 Motor Oil 10W-30 Motor Oil - Bad Boy Synthetic Blend Motor Oil Recommend PAGE 3...
  • Page 4 40 CFR 1060 within the first two years Bad Boy Inc. will replace the defective component. Your evaporative emission control system may include parts such as fuel tanks, fuel lines, carbon canisters, fuel caps, valves, vapor hoses, clamps, or connectors.

  • Page 5: General Operation

    SECTION 2: MOWER SAFETY GUIDELINES Never allow untrained people to operate this machine. It is the owner’s responsibility to get training and see to it that anyone who has permission to use your machine receives the proper training. Do not mow around people. The factory discharge chute is designed to deflect debris downward, but it could be possible for debris to be thrown in a way that can cause damage to people or property.

  • Page 6: Slope Operation

    SLOPE OPERATION Slopes are a major factor related to loss of control and tip over accidents, which can result in severe injury or death. Operation on all slopes requires extra caution. If you cannot back up the slope, or you feel uneasy on it, do not mow it. 2.22 Mow up and down slopes, not across.
  • Page 7 SERVICE: SAFE HANDLING OF GASOLINE To avoid personal injury or property damage, use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive. 2.45 Extinguish all cigarettes, cigars, pipes, and all other sources of ignition. 2.46 Use only an approved gasoline container. 2.47 Never remove gas cap or add fuel with the engine running.

  • Page 8: Safety Interlock System

    SAFETY INTERLOCK SYSTEM Your Bad Boy mower is equipped with a safety interlock system. This system is designed to prevent serious injury or death to the operator and other people or property damage. The system consists of an operator presence switch in the seat, the parking brake, drive lever neutral position, the mower blade engagement switch, and the ignition switch.
  • Page 9 The machine could lose traction on a decline or tip backwards on an incline. 3.14 Once you become comfortable with your Bad Boy Mower you will notice your overall mowing time will decrease.
  • Page 10 SECTION 4: MOWER MAINTENANCE SECTION 5: MOWER STORAGE & TRANSPORTATION Keep machine from collecting debris by storing in a covered area while not in use. 5.2 Fuel can harm your machine if left for more than 30 days without changing, especially if the fuel contains ethanol.
  • Page 11 Maintenance Log Date: Hours: Performed: Performed Date: Hours: Date: Hours: Performed: Performed Date: Hours: Performed Date: Hours: Date: Hours: Performed: Performed Date: Hours: Date: Hours: Performed: Performed Date: Hours: Performed Date: Hours: Performed: Date: Hours: Date: Hours: Performed: Performed Date: Hours: Performed Date:...
  • Page 12 SECTION 6: TROUBLESHOOTING Q: How do I prevent an uneven cutting pattern and increase the quality of cut? A: Check tire pressure, check blade sharpness (replace blades or sharpen at least once per year or when needed), make sure blades are tightened properly, check spring and belt tension, check the underside of the deck to ensure the mower deck is free of grass build-up and debris, make sure your machine is at full throttle, and vary your mowing pattern each time you cut your grass.
  • Page 13 SECTION 7: CONTROLS Ignition Switch—Bad Boy Mowers have a three position ignition switch: off, run, and start. With key inserted, rotate it clockwise to START position and release key when engine starts, and switch will automatically return to he RUN position.
  • Page 14 By pulling the arms out, the mower can be put in a neutral position. Return the arms to the “forward position” for normal operation. Your Bad Boy Mower Weighs: MZ SERIES: 585—602 lbs *** Weights fluctuate with the addition of accessories.

  • Page 15: Greasing Bearings

    SECTION 10: MOWER BLADE MAINTENANCE 10.1 Check mower blades after each use. This is essential for maintaining well-groomed turf. Keep the blades sharp. If a dull blade is used for cutting, the grass will tear rather than cut. This could damage the grass leaving a brown frayed top on the grass within a few hours. A dull blade will also require more power from the engine.

  • Page 16: How To Choose The Right Blade

    HOW TO CHOOSE THE RIGHT BLADE Essentially there are only TWO basic styles of mowing blades used or approved for use on our current products: 1) The standard style of mowing blade is essentially designed for cutting grass and effectively discharging the clippings out from the deck to fall onto the lawn or to be captured in a grass collection system.

  • Page 17: Mowing Tips

    MOWING TIPS: • Mow header strips at the ends of the lawn and around flower beds first. Make them wide enough that you can turn the mower around in the already mown section. Then mow back and forth between these header strips overlapping each lap by about 1/8 the width of the mower’s deck.

  • Page 18: Service Section

    SERVICE SECTION SECTION 1: HYDROSTATIC SYSTEM The hydrostatic system on MZ models is a sealed lifetime transaxle system, so no maintenance is required. Under the rear of the mower, you will find the two levers shown in the image. These bypass levers serve as a neutral for moving the mower while the engine is not running.
  • Page 19 SECTION 2: DRIVE BELT Shown to the right is the MZ pump belt tensioner. Tightening the two 3/4˝ jam nuts on the right side will increase the belt tension. The tension should be adjusted so that there is between 50 to 55 lbs. of tension on the belt. This can be checked with a belt tension gauge as shown to the right.
  • Page 20 540cc Briggs This machine has an oil drain hose installed on the engine to allow for easier oil changes. Bad Boy recommends that the oil and filter be changed at intervals of 50 usage hours or yearly, whichever occurs first. Consult your engine owner’s manual for exact oil capacity.
  • Page 21 Changing the Spark Plug: (1) In order to access the spark plug you will need to drop the rear engine cover. This can be done by removing the two carriage bolts in the rear with a ½” socket and drill or wrench. Then loosen the two on each side and the rear engine plate will swing down for easy access to the spark plug.
  • Page 22 Kohler KT725 This machine has an oil drain hose installed on the engine to allow for easier oil changes. Bad Boy recommends that the oil and filter be changed at intervals of 50 usage hours or yearly, whichever occurs first. The oil capacity is 2 quarts.
  • Page 23 6) Fill crankcase with approximately 2 quarts of new oil. Level should top of indicator on dipstick. 7) Reinstall oil fill/dipstick and tighten securely. 8) Start engine; check for oil leaks. Stop Engine; correct oil leaks. Recheck oil level 9) Dispose of used oil and filter in accordance with local ordinances.
  • Page 24 The air cleaner is the engine’s only defense against damaging foreign particles. It is very important that the air cleaner element is inspected prior to each use. Remove the element and tap its sides in order to remove debris. Do not blow the filter out using compressed air. Doing so will greatly reduce the air cleaner’s effectiveness.
  • Page 25 3.4 Changing the spark plugs and checking the spark plug gap: 1) In order to access the spark plugs you will need to remove the rear engine cover. This can be accomplished by removing the two carriage bolts using a 7/16” ratcheting wrench in the back as well as the two connecting the rear engine cover to the plastic shrouds.
  • Page 26 If a fuse is repeatedly blowing, contact your Bad Boy dealer. Check the condition and connection of the relays located under the control panel. Ensure that they are clean and connected.
  • Page 27 Check the condition and connection of the relays located under the control panel. Ensure that they are clean and connected. Make sure that wire terminal ends have not been pushed out of the relay block. If you are having issues starting your mower ensure the signal wire is connected to your starter solenoid.
  • Page 28 PAGE 28...
  • Page 29 SECTION 5: FRAME Torque rear wheel lugs to 65-75 ft. lbs. Re-torque at every oil change and check at every mowing. There is one grease fitting on each of the actuator bar pillow blocks (Total of 4). Grease twice a season. The pump belt tensioner is located under the engine and has a grease fitting at its pivot point.
  • Page 30 SECTION 6: CUTTING DECK (1) Remove ignition key. (2) Lower the deck to its lowest position. (3) Remove both the right and left blade pulley cover. Use a 7/16” socket or wrench to remove the bolts. Then lift and remove the pulley covers.
  • Page 31 (4) Ensure the belt is on every pulley and then place the belt on the bolt of the pulley on the left side and place pressure on it and roll the pulley to allow the belt to fall into place. (5) Check to make sure the belt is on all the pulleys and matches the belt routing sticker.
  • Page 32 If deck adjustments are necessary, the deck hanger bolts have adjustable slots. These adjusters affect the overall height of the deck and the level from left to right. The deck spring tension is critical. If the tension is too high, premature failure of the deck belt and blade spindles can occur.
  • Page 33 The blade on the top (see photo) was utilized long after replacement was required. In addition to a decline in cut quality, failure to replace a worn or damaged blade creates a major safety hazard. Bad Boy recommends that blade sharpening be performed by a professional. Blade Removal:...

  • Page 34: Parts Section

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  • Page 52 NOTES: __________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ PAGE 52...
  • Page 53 NOTES: __________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ PAGE 53...

  • Page 54: Limited Warranty

    1. WHAT THIS WARRANTY COVERS, AND FOR HOW LONG: Bad Boy, Inc. will, at its option, repair or replace, without charge, any part covered by the warranty which is found to be defective in material and/or workmanship for two (2) years or (200) hours* after the date of sale to the original retail purchaser unless the product is used for commercial, industrial, or rental purposes, in which case the Bad Boy MZ mower will carry no warranty, whatsoever.
  • Page 55 Bad Boy, Inc. 102 Industrial Drive Batesville, AR 72501 www.badboymowers.com Technical Support: ............techsupport@badboymowers.com Warranty: ..................warranty@badboymowers.com Parts: ....................partsdept@badboymowers.com WARRANTY REGISTRATION Ensure selling dealership has registered mower within 30 days of purchase to validate warranty. Please record your serial number, date of purchase and dealership information for your records.
  • Page 56 MODEL For additional information, please see us at www.badboymowers.com Bad Boy, Inc. 102 Industrial Drive Batesville, Arkansas 72501...

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