Husqvarna YTH21K46 User Manual

Husqvarna YTH21K46

44 pages

Other manuals for Husqvarna YTH21K46

Illustrated Parts List19 pages

Questions and Answers:

M
Miss Catherine MirandaJul 26, 2025
Why my Husqvarna YTH21K46 Lawn Mower will not start?
- M
  Meghan HicksJul 26, 2025
  There are several reasons why your Husqvarna Lawn Mower might not start. It could be due to: * being out of fuel (fill the fuel tank), * improper choking (refer to the “TO START ENGINE” section in the Operation section), * a flooded engine (wait several minutes before trying again), * a bad spark plug (replace it), * a dirty air filter (clean or replace it), * a dirty fuel filter (replace it), * water in the fuel (empty the fuel tank and carburetor, refill with fresh gasoline, and replace the fuel filter), * loose or damaged wiring (check all wiring). Other potential causes include a carburetor out of adjustment (see “To Adjust Carburetor” in the Service Adjustments section) or engine valves out of adjustment (contact an authorized service center/department).
N
nicholsrobinJul 31, 2025
Why is my Husqvarna YTH21K46 hard to start?
- M
  Mary MartinJul 31, 2025
  If your Husqvarna Lawn Mower is hard to start, it could be due to several reasons: * A dirty air filter (clean or replace it). * A bad spark plug (replace it). * A weak or dead battery (recharge or replace it). * A dirty fuel filter (replace it). * Stale or dirty fuel (empty the fuel tank and refill with fresh, clean gas). * Loose or damaged wiring (check all wiring). Other potential causes include a carburetor out of adjustment (see “To Adjust Carburetor” in Service Adjustments section) or engine valves out of adjustment (contact an authorized service center/department).
K
Katrina PerkinsAug 10, 2025
What to do if Husqvarna YTH21K46 engine will not turn over?
- R
  Ryan RichardsAug 10, 2025
  If the engine of your Husqvarna Lawn Mower will not turn over, make sure that: * The brake pedal is depressed (depress the brake pedal). * The attachment clutch is disengaged (disengage the attachment clutch). Also, check for a weak or dead battery (recharge or replace it), a blown fuse (replace the fuse), corroded battery terminals (clean the battery terminals), loose or damaged wiring (check all wiring), a faulty ignition switch (check/replace the ignition switch), or a faulty solenoid or starter (check/replace the solenoid or starter). For faulty operator presence switch(es), contact an authorized service center/department.
A
Andrew DrakeAug 15, 2025
How to fix excessive vibration in Husqvarna Lawn Mower?
- L
  lance91Aug 15, 2025
  Excessive vibration in your Husqvarna Lawn Mower can be caused by: * A worn, bent, or loose blade (replace the blade or tighten the blade bolt). * A bent blade mandrel (replace the blade mandrel). * Loose or damaged parts (tighten loose parts or replace damaged parts).
D
Daisy BaileyAug 20, 2025
What to do if Husqvarna Lawn Mower engine clicks but will not start?
- L
  Laura RiosAug 20, 2025
  If your Husqvarna Lawn Mower engine clicks but doesn't start, the issue might be due to: * A weak or dead battery (recharge or replace it). * Corroded battery terminals (clean the battery terminals). * Loose or damaged wiring (check all wiring). * A faulty solenoid or starter (check/replace the solenoid or starter).

Husqvarna YTH21K46 Specifications

General

Engine Manufacturer	Kohler
Engine Model	Courage
Engine Type	OHV
Engine Power	21 hp
Cylinders	2
Cutting Width	46 inches
Cutting Height Min	1.5 inches
Cutting Height Max	4 inches
Transmission Type	Hydrostatic
Blades	2
Tire Size Front	15x6-6
Tire Size Rear	20x8-8
Speed Range Forward	0-5.5 mph
Fuel Tank Volume	3 gallons
Turning Radius	16 in
Blade Engagement	Electric
Warranty	3 years

Summary

SAFETY RULES

GENERAL OPERATION

Read and understand all instructions before starting operation.

SLOPE OPERATION

Exercise extra caution when operating on slopes to prevent tip-over accidents.

CHILDREN SAFETY

Keep children out of the mowing area and ensure their watchful care by a responsible adult.

SERVICE AND GASOLINE HANDLING

Handle gasoline with extreme care as it is highly flammable and its vapors are explosive.

GENERAL SERVICE PROCEDURES

PRODUCT SPECIFICATIONS

ASSEMBLY

OPERATION

SYMBOLS EXPLANATION

Learn and understand the meaning of various symbols used on the tractor and in literature.

OPERATION (CONTINUED)

KNOW YOUR TRACTOR

Familiarize yourself with tractor controls and adjustments before operating.

REVERSE OPERATION AND HILL OPERATION

Using ROS, transporting, and operating safely on hills.

STARTING THE ENGINE

Procedures for starting the engine, including pre-start checks and weather considerations.

OPERATION (CONTINUED)

HOW TO USE YOUR TRACTOR

Guide on setting the parking brake, stopping, and using the throttle control.

DRIVING AND MOWER OPERATION

TRANSMISSION PURGE AND MOWING TIPS

Procedure to purge transmission and advice for effective mowing.

ADJUSTING MOWER AND GAUGE WHEELS

MAINTENANCE

MAINTENANCE SCHEDULE AND RECOMMENDATIONS

Comprehensive schedule of maintenance tasks and general recommendations.

BEFORE EACH USE CHECKS

MAINTENANCE (CONTINUED)

TRACTOR AND BLADE MAINTENANCE

BATTERY MAINTENANCE

MAINTENANCE (CONTINUED)

SPARK PLUGS AND FUEL FILTER REPLACEMENT

ENGINE LUBRICATION AND OIL CHANGE

DECK WASHOUT PORT CLEANING

SERVICE AND ADJUSTMENTS

MOWER REMOVAL AND INSTALLATION

SERVICE AND ADJUSTMENTS (CONTINUED)

ATTACHING MOWER COMPONENTS

MOWER LEVELING ADJUSTMENTS

Ensuring proper mower deck side-to-side and front-to-back leveling.

BELT REPLACEMENT AND BRAKE CHECK

SERVICE AND ADJUSTMENTS (CONTINUED)

WHEEL REPAIR AND BATTERY MANAGEMENT

SERVICE AND ADJUSTMENTS (CONTINUED)

STORAGE PROCEDURES

TRACTOR AND ENGINE STORAGE

TROUBLESHOOTING POINTS

ENGINE STARTING AND POWER ISSUES

Common causes and corrections for engine starting problems and loss of power.

VIBRATION AND HARD STARTING

TROUBLESHOOTING POINTS (CONTINUED)

CUTTING AND DRIVE PROBLEMS

Causes and corrections for poor cut, non-rotating blades, and loss of drive.

ELECTRICAL AND ENGINE SHUT-OFF ISSUES

SCHEMATIC DIAGRAMS

CHASSIS ASSEMBLY

DRIVE SYSTEM

ENGINE ASSEMBLY

STEERING ASSEMBLY

MOWER DECK ASSEMBLY

MOWER LIFT ASSEMBLY

SEAT ASSEMBLY

SUGGESTED GUIDE FOR SIGHTING SLOPES FOR SAFE OPERATION

SLOPE MEASUREMENT GUIDE

A guide to measuring slopes for safe tractor operation.

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