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Troy-Bilt 566 - User Manual

Troy-Bilt 566
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PRINTED IN U.S.A.
Operator’s Manual
FORM NO.
769-01542.fm
(12/2004)
IMPORTANT:
Read safety rules and instructions carefully before operating equipment.
Warning:
This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-
covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if
any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required
by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark
arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131
Cleveland, Ohio 44136-0019.
Troy-Bilt LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
Models 566 & 569
Variable Speed
21” Self Propelled
Mulching Mower

Table of Contents

Questions and Answers

  • K
    Kimberly RodriguezAug 13, 2025
    How to troubleshoot Troy-Bilt Lawn Mower when engine fails to start?
    • J
      Johnny MorseAug 13, 2025
      If your Troy-Bilt Lawn Mower engine won't start, several factors could be the cause. Ensure the blade control handle is engaged. Check that the spark plug wire is connected. The fuel tank may be empty or contain stale fuel, so refill with fresh gasoline. A blocked fuel line could also be the culprit, so try cleaning it. The spark plug might be faulty, requiring cleaning, gap adjustment, or replacement. Lastly, if the engine is flooded, wait a few minutes before attempting to restart, and avoid priming it.
  • D
    dramosAug 16, 2025
    How to fix Troy-Bilt 566 Lawn Mower that idles poorly?
    • S
      Sarah SimsAug 16, 2025
      If your Troy-Bilt Lawn Mower idles poorly, it could be due to a faulty spark plug or a gap that is too wide; reset the gap to .030 inches or replace the spark plug. Another potential cause is a dirty air cleaner, so clean the air cleaner.
  • S
    scochranAug 20, 2025
    Why does my Troy-Bilt Lawn Mower engine run erratic?
    • K
      Kari VegaAug 21, 2025
      If your Troy-Bilt Lawn Mower engine is running erratically, there are several potential causes. First, check the spark plug wire to ensure it is securely connected and tightened. A blocked fuel line or stale fuel could also be the issue, so clean the fuel line and refill the tank with fresh gasoline. Additionally, a plugged vent in the gas cap might be the problem, so clear the vent. Water or dirt in the fuel system can also cause erratic behavior, so drain the fuel tank and refill with fresh fuel. Finally, a dirty air cleaner could be the cause; in this case, clean the air cleaner.
  • M
    Michaela BakerAug 25, 2025
    What to do if Troy-Bilt 566 engine overheats?
    • E
      Elijah SteeleAug 25, 2025
      If your Troy-Bilt Lawn Mower engine is overheating, it could be due to a couple of reasons. The engine oil level might be low, so fill the crankcase with the proper oil. Alternatively, airflow could be restricted, so clean the lawn mower engine.
  • D
    david39Aug 28, 2025
    Why is my Troy-Bilt 566 experiencing excessive vibration?
    • C
      Christopher WestAug 28, 2025
      Excessive vibration in your Troy-Bilt Lawn Mower can stem from several issues. Start by checking if the blade is loose or unbalanced; if so, tighten the blade and adapter, and balance the blade. A bent cutting blade could also be the cause, requiring replacement. If the engine crankshaft is bent, contact the nearest service center.
  • H
    heather04Sep 1, 2025
    Why Troy-Bilt 566 Lawn Mower will not mulch grass?
    • D
      David JohnstonSep 1, 2025
      If your Troy-Bilt Lawn Mower won't mulch grass effectively, it may be because the grass is wet, so wait until the grass is dry to cut. If the grass is excessively high, mow once at a high cutting height, then mow again at the desired height. A dull blade can also prevent mulching, so sharpen or replace the blade.
  • K
    Katelyn WilliamsSep 4, 2025
    What causes an uneven cut with a Troy-Bilt 566 Lawn Mower?
    • T
      tonya81Sep 4, 2025
      An uneven cut with your Troy-Bilt Lawn Mower may be due to the wheels not being at the same height, so reposition all wheels at the same height. Another cause could be a dull blade, so sharpen or replace the blade.
  • J
    James SanchezSep 8, 2025
    What to do if Troy-Bilt 566 hesitates at high speed?
    • S
      Shawn RamirezSep 8, 2025
      An occasional skip or hesitation at high speed in your Troy-Bilt Lawn Mower might be because the spark plug gap is too close. Adjust the gap to .030 inches.

Summary

Section 1: Important Safe Operation Practices

General Operation

Read manual, use caution, keep area clear, wear safety gear, avoid hazards.

Slope Operation

Operate on slopes with extra caution, mow across face, avoid steep slopes.

Children

Keep children away from mower, be alert, never allow children under 14 to operate.

General Service

Follow safety rules for cleaning, repairs, inspections, and parts replacement.

Section 3: Assembling Your Lawn Mower

Removing Unit From Carton

Instructions for safely removing the mower from its shipping carton.

Assembling Handle

Step-by-step guide for attaching and securing the mower handles.

Assembling Grass Catcher

Instructions for assembling and attaching the grass catcher to the mower.

Attaching Starter Rope

Guide on how to attach and route the starter rope for the mower.

Section 4: Know Your Lawn Mower

Blade Control Handle

Cutting Height Adjustment Lever

Section 5: Operating Your Lawn Mower

Gas & Oil Fill-Up

Starting Engine

Detailed steps for safely starting the mower's engine.

To Stop Engine

Mulching

Section 6: Maintaining Your Lawn Mower

Cleaning Mower

Engine Care

Essential maintenance tasks for the engine, including oil and air cleaner service.

Lubrication

Blade Care

Procedures for inspecting, sharpening, and balancing the mower blade.

Section 7: Service & Adjustments

Replacing Drive Belt

Step-by-step instructions for replacing the drive belt on the mower.

Replacing Rear Flap

Adjusting Cutting Height

Drive Clutch Control

Section 8: Off-Season Storage

Mower

Engine

Section 9: Trouble-Shooting

Manufacturers Limited Warranty

Troy-Bilt 566 Specifications

General IconGeneral
EngineBriggs & Stratton
Engine Displacement190cc
Deck MaterialSteel
Starting SystemRecoil
Mulching CapabilityYes
Bagging CapabilityYes
Side Discharge CapabilityYes
Cutting Height1.25 - 3.75 in
Cutting OptionsMulching, Bagging, Side Discharge
Engine Type4-Cycle
Cutting Height Positions6

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