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LAWNBOY 81245 - User Manual

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Form No. 3354-946 Rev A
Precision™ Z340 HLX Riding
Mower
Model No. 81245 —Serial No. 260000001 and Up
Register your product at www.Lawn-Boy.com Original Instructions (EN)

Questions and Answers

  • M
    Mark LucasAug 9, 2025
    What to do if my LAWNBOY 81245 Lawn Mower blades do not rotate?
    • N
      natalie29Aug 9, 2025
      If the blades on your LAWNBOY Lawn Mower aren't rotating, consider the following: * A worn, loose, or broken drive belt; install a new one. * The drive belt being off the pulley; install the drive belt and check the adjusting shafts and belt guides for the correct position. * A worn, loose, or broken mower belt; install a new one.
  • M
    malvarezAug 14, 2025
    Why does my LAWNBOY 81245 Lawn Mower engine overheat?
    • S
      stephanie19Aug 14, 2025
      Your LAWNBOY Lawn Mower engine may overheat due to several reasons: * The engine load might be excessive, so reduce the ground speed. * The oil level in the crankcase could be low, so add oil. * The cooling fins and air passages might be obstructed; remove any obstructions. * The air cleaner could be dirty, so clean or replace the air cleaner element. * Dirt, water, or stale fuel in the fuel system can also cause overheating; in this case, contact an Authorized Service Dealer.
  • K
    kayla19Aug 18, 2025
    Why is my LAWNBOY 81245 Lawn Mower engine losing power?
    • B
      beverly01Aug 18, 2025
      Your LAWNBOY Lawn Mower engine may lose power for several reasons: * The engine load might be excessive; reduce ground speed. * The air cleaner may be dirty; clean it. * The oil level in the crankcase may be low; add oil. * The cooling fins and air passages may be plugged; remove the obstruction. * The spark plug(s) may be pitted, fouled, or have an incorrect gap; install a new, correctly gapped spark plug(s). * The vent in the fuel cap may be closed; open the vent. * The fuel filter may be dirty; replace the fuel filter. * There may be incorrect fuel in the fuel tank; drain the tank and replace the fuel with the proper type. * If there is dirt, water, or stale fuel is in the fuel system, contact an Authorized Service Dealer.
  • K
    Kevin SmithAug 22, 2025
    What to do if my LAWNBOY 81245 Lawn Mower starter does not crank?
    • C
      clarkescottAug 22, 2025
      If the starter on your LAWNBOY Lawn Mower isn't cranking, here are a few things to check: * Ensure the blade control switch is disengaged; move it to the Disengaged position. * Make sure the motion control levers are in the brake position. * Confirm that the operator is seated. * The battery might be dead; charge it. * Check the electrical connections for corrosion or looseness and ensure good contact. * A blown fuse could be the problem; replace the fuse. * If a relay or switch is damaged, contact an Authorized Service Dealer.
  • N
    Nicholas SchmidtAug 27, 2025
    Why does my LAWNBOY 81245 have abnormal vibration?
    • J
      Jessica KellerAug 27, 2025
      Abnormal vibration in your LAWNBOY Lawn Mower can stem from several issues: * Loose engine mounting bolts; tighten them. * A loose engine pulley, idler pulley, or blade pulley; tighten the appropriate pulley. * A damaged engine pulley; contact an Authorized Service Dealer. * Bent or unbalanced cutting blade(s); install a new cutting blade(s). * A loose blade mounting bolt; tighten it. * If a blade spindle is bent, contact an Authorized Service Dealer.
  • M
    Marisa ReedAug 31, 2025
    Why does my LAWNBOY 81245 Lawn Mower have an uneven cutting height?
    • A
      Amanda CharlesAug 31, 2025
      Uneven cutting height with your LAWNBOY Lawn Mower can be caused by: * Dull blade(s); sharpen them. * Bent cutting blade(s); install new ones. * The mower not being level; level it from side-to-side and front-to-rear. * An incorrectly set anti-scalp wheel; adjust its height. * A dirty mower underside; clean it. * Incorrect tire pressure; adjust it. * If a blade spindle is bent, contact an Authorized Service Dealer.
  • J
    jill25Nov 4, 2025
    What to do if my LAWNBOY 81245 engine will not start, starts hard, or fails to keep running?
    • A
      Amber JacksonNov 4, 2025
      If your LAWNBOY Lawn Mower engine is having trouble starting or staying running, consider these potential causes: * The fuel tank may be empty; fill it up. * The fuel valve might be turned off; open it. * The choke may not be on; move the choke lever to the On position. * A dirty air cleaner can cause issues; clean or replace it. * Check if the spark plug wire(s) is loose or disconnected and install it on the spark plug. * The spark plug(s) may be faulty; install a new, correctly gapped spark plug(s). * A dirty fuel filter can cause problems; replace the fuel filter. * Using incorrect fuel can also be the culprit; drain the tank and replace it with the proper type. * Low oil level can prevent starting; add oil to the crankcase. * If there is dirt, water, or stale fuel ...

Summary

Safety

Safe Operating Practices

General safety rules for operating the mower.

Slope Operation Safety

Guidelines for safe operation on slopes.

Child Safety Precautions

Safety measures to protect children around the mower.

Gasoline Handling Safety

Precautions for safe handling and storage of gasoline.

Lawn-Boy Riding Mower Specific Safety

Safety information unique to Lawn-Boy riding mowers.

Safety and Instructional Decals

Critical Safety Warning Label

Prominent danger label with essential safety instructions.

Operation

General Safety and Fueling

Emphasizes safety, recommended gasoline, and mowing on slopes.

Engine Checks and Starting

Procedures for checking oil, starting, and stopping the engine.

Blade Engagement and Safety Interlocks

Steps to engage/disengage blades and test safety interlocks.

Movement and Height Adjustment

Controls for forward/backward motion and adjusting cutting height.

Maintenance

Recommended Maintenance Schedule

Table outlining maintenance tasks and intervals.

Important Maintenance Notes

Crucial safety warnings regarding maintenance procedures.

Engine Oil and Filter Change

Step-by-step guide to changing engine oil and filter.

Mower Blade Servicing

How to maintain and service mower blades.

Adjusting Front-to-Rear Blade Slope

How to adjust the mower deck for proper front-to-rear slope.

Storage

Troubleshooting

Engine Overheating Issues

Possible causes and solutions for engine overheating.

Starter Not Cranking Problems

Diagnosing and fixing starter motor issues.

Engine Start;Run Problems

Causes and fixes for engine not starting or running poorly.

Engine Losing Power Issues

Diagnosing and resolving engine power loss.

Machine Not Driving Issues

Troubleshooting causes for the machine not moving.

Abnormal Vibration Causes

Possible reasons for abnormal vibration and solutions.

Uneven Cutting Height Issues

Causes and fixes for uneven mower cutting height.

Blades Not Rotating Problems

Troubleshooting causes for the mower blades not turning.

Schematics

LAWNBOY 81245 Specifications

General IconGeneral
BrandLAWNBOY
Model81245
CategoryLawn Mower
LanguageEnglish

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