Husqvarna TC138 - User Manual

Questions and Answers

R
Ryan RobinsonAug 20, 2025
Why won't my Husqvarna Lawn Mower engine start?
- A
  Alicia DixonAug 20, 2025
  Several factors can prevent your Husqvarna Lawn Mower engine from starting. These include: a lack of fuel (fill the tank); incorrect throttle control position (refer to the start instructions); a defective spark plug (replace it); a dirty air filter (clean or replace it); a clogged fuel filter (replace it); water in the fuel (remove all fuel and replace the fuel filter); loose or damaged wires (check them); incorrectly adjusted engine valves (consult a service agent); a flooded engine (wait 2–3 minutes before restarting); or bad fuel (replace it).
F
fosterrebekahAug 21, 2025
What to do if my Husqvarna TC138 Lawn Mower starter motor does not turn the engine over?
- S
  Shannon KingAug 22, 2025
  If the starter motor on your Husqvarna Lawn Mower isn't turning the engine over, it could be due to: a weak battery (charge it); the attachment clutch control being engaged (disengage it); the clutch/brake pedal not being fully depressed (push it down fully); bad battery cable connections (check them); a defective main fuse (replace it); a defective ignition lock (consult a service agent); a defective safety connector for the clutch/brake pedal (consult a service agent); a defective starter motor or solenoid (consult a service agent); or a defective operator presence control (OPC) (check the wires, switches and connections; if the issue persists, consult a service agent and do not operate the product with a defective OPC).
J
Joseph JonesAug 25, 2025
Why does the Husqvarna TC138 Lawn Mower engine backfire when it stops?
- E
  Elizabeth RamirezAug 25, 2025
  The engine can backfire when it stops if the throttle control is not put in the slow position.
N
Nicholas SmithAug 26, 2025
What to do if my Husqvarna TC138 Lawn Mower engine does not run smoothly?
- B
  Barbara WilliamsAug 26, 2025
  If your Husqvarna Lawn Mower engine isn't running smoothly, consider these potential causes: a defective spark plug (replace it); incorrect carburetor adjustment (consult a service agent); a dirty air filter (clean or replace it); a defective fuel tank cap check valve (replace the cap); low fuel (fill the tank); water in the fuel (remove all fuel and replace the fuel filter); engaged choke when the engine is warm (disengage the choke); incorrect fuel mix or type (remove the fuel and replace with the correct one); a clogged fuel filter (replace it); or dirt in the carburetor or fuel line (clean these).
H
Heather IrwinAug 28, 2025
Why is my Husqvarna TC138 losing power?
- D
  Daniel GonzalezAug 28, 2025
  A loss of power in your Husqvarna Lawn Mower can stem from several issues: operating at too high a speed (use slower speed); the throttle control being in the choke position (put it in the fast position); grass buildup under the cutting deck (clean the deck); a dirty air filter (clean or replace it); low or dirty engine oil (check and fill or replace the oil); a defective spark plug (replace it); a dirty fuel filter (replace it); bad fuel (replace it); water in the fuel (remove all fuel and replace the fuel filter); a loose spark plug wire (connect and tighten it); blocked air intake or cooling fins (clean them); a clogged or damaged muffler (clean or replace it); loose or damaged wiring (check all wiring); or incorrectly adjusted engine valves (consult a service agent).
C
cramirezAug 30, 2025
How to fix vibration in my Husqvarna TC138 Lawn Mower?
- A
  Albert LopezAug 30, 2025
  If your Husqvarna Lawn Mower is vibrating, check for: loose blades (tighten the bolts); damaged or unbalanced blades (balance or replace them); or a loose engine (tighten the engine bolts).
B
barkersamanthaSep 1, 2025
Why is my Husqvarna TC138 Lawn Mower battery not charging?
- J
  Jerome FletcherSep 1, 2025
  If your Husqvarna Lawn Mower battery isn't charging, the issue might be: a defective main fuse (replace it); a defective battery (replace it); a disconnected charging cable (connect it); or bad cable connections at the battery terminals (check them).
S
Sara JimenezSep 2, 2025
Why does my Husqvarna TC138 Lawn Mower move slowly or not at all?
- D
  denisenelsonSep 3, 2025
  If your Husqvarna Lawn Mower is moving slowly, erratically, or not at all, check if: the product is in freewheel mode (pull out the freewheel control lever); the parking brake is engaged (disengage it); the drive belt is loose or damaged (replace it); there is air in the transmission (remove the air); there are unwanted materials on the steering plate (clean the product); or the square key on the axle is missing (install the square key).
S
Shannon RubioSep 5, 2025
What to do if my Husqvarna TC138 Lawn Mower blades cannot rotate?
- B
  Brenda JonesSep 5, 2025
  If the blades on your Husqvarna Lawn Mower won't rotate, it could be due to: a blockage in the clutch mechanism (remove it); a worn or damaged drive belt for the cutting deck (replace it); a frozen idler pulley (replace it); or a frozen blade mandrel (replace it).
M
michael52Sep 7, 2025
Why is my Husqvarna TC138 engine getting too hot?
- M
  Melissa StantonSep 7, 2025
  If your Husqvarna Lawn Mower engine is overheating, it could be due to: engine overload (decrease the workload); blocked air intake or cooling fins (clean them); a defective cooling fan (consult a service agent); low engine oil (check and fill if necessary); a defective ignition lock (consult a service agent); or a defective spark plug (replace it).

Summary

Introduction

Pre-Delivery Inspection and Product Numbers

Checks and identification details before product use.

Service Agent Contact Information

Details for contacting authorized service agents for assistance.

Product Description

Overview of the lawn tractor's features and specifications.

Intended Use

Defines the product's proper application and limitations.

Support and Help

Information on how to get assistance or ask questions about the product.

Product Overview

Product Controls Overview

Identification and function of various controls on the product.

Symbols on the Product

Explanation of safety and operational symbols found on the machine.

Hour Meter Functionality

Explains how the hour meter tracks engine operation and how to reset it.

Product Liability Information

Outlines conditions under which the manufacturer is not liable for damages.

Euro V Emissions Compliance

Details on the product's compliance with Euro V emissions standards.

Safety

Safety Definitions and Notes

Explains the meaning of warnings, cautions, and notes used in the manual.

Safe Operation Practices for Ride-On Mowers

Guidelines for safe operation, including specific warnings for users.

Child Safety Precautions

Critical safety information regarding children's presence and interaction with the mower.

General Operation Safety

Fundamental safety rules for operating the machine.

Safety Devices and Checks

Information on product safety devices and how to check their functionality.

Operator Presence Control (OPC) Check

Procedure to verify the correct operation of the operator presence control system.

Reverse Operation System (ROS) Check

Steps to ensure the reverse operation system functions correctly.

Brake System Checks

Procedures for verifying the brake system's functionality and maintenance needs.

Muffler Safety and Checks

Information on the muffler's function, safety precautions, and inspection.

Cutting Grass on Slopes Safely

Critical guidelines for operating the mower on slopes to prevent accidents.

Fuel Safety Precautions

Essential safety rules for handling fuel to prevent fire and explosion.

Battery Safety Guidelines

Safety measures to follow when working with the product's battery.

Transport Safety Procedures

Recommendations for safely transporting the product.

Maintenance Safety Instructions

General safety rules to follow before performing maintenance tasks.

Assembly

Required Assembly Tools

List of tools needed for product assembly.

Loose Parts for Assembly

Identification of parts that require assembly after unpacking.

Installing the Steering Wheel

Step-by-step guide for attaching the steering wheel assembly.

Installing the Seat

Instructions for correctly mounting and securing the operator's seat.

Assembling the Grass Catcher

Steps to put together the grass catcher accessory.

Adjusting Grass Catcher Brackets

How to adjust the grass catcher mounting brackets for proper fit.

Installing Grass Catcher Spring Latches

Instructions for attaching the spring latches for the grass catcher.

Installing and Adjusting Grass Catcher Lever;Extension

Guide for fitting and adjusting the grass catcher lever or extension.

Adjusting the Seat Position

How to adjust the seat for optimal operator comfort and control.

Connecting the Battery

Steps for correctly connecting the battery to the mower's electrical system.

Operation

Filling the Fuel Tank

Instructions on how to safely add fuel to the product.

Starting the Product

Procedures and checks required before starting the engine.

Starting a Warm Engine

Steps for starting the engine when it has recently been running.

Starting a Cold Engine

Procedure for starting the engine from a cold state.

Starting with a Weak Battery

Guidance on starting the engine if the battery charge is low, including jump-starting.

Setting Cutting Deck Position

How to set the cutting deck for transport or mowing.

Setting the Cutting Height

Instructions on adjusting the mower deck height for desired cut.

Moving Forward and Rearward

How to control the product's movement using the drive pedals.

Engaging and Disengaging the Parking Brake

Steps for applying and releasing the parking brake.

Stopping the Product Safely

Procedures for properly shutting down and securing the mower.

Using the Throttle Control

How the throttle adjusts engine speed and blade speed.

Using the Headlight

Instructions for operating the product's headlight.

Engaging and Disengaging the Cutting Deck

Steps for activating and deactivating the mower blades.

Using the Reverse Operation System (ROS)

Guide on how to use the ROS for safe reverse mowing.

Achieving a Good Cutting Result

Tips and best practices for optimal grass cutting performance.

Emptying the Grass Catcher

Procedure for safely removing grass clippings from the catcher.

Putting the Product in Freewheel Mode

How to disengage the transmission for towing or manual movement.

Installing the Mulch Plug Accessory

Steps to install the accessory for mulching grass clippings.

Installing the Rear Discharge Deflector Accessory

Instructions for fitting the accessory for discharging grass to the rear.

Installing the Grass Catcher Accessory

Steps for attaching the grass catcher accessory to the mower.

Maintenance

Maintenance Schedule Overview

A table outlining regular maintenance tasks and intervals.

Lubrication Schedule Details

Specific points and types of lubricants for various components.

Cleaning the Product

Instructions on how to clean the mower safely and effectively.

Using the Deck Washout Port

Guide for cleaning the cutting deck using the integrated washout port.

Adjusting the Throttle Control Cable

Information on adjusting the throttle cable if necessary.

Examining Interlocks and Relays

Checking electrical interlock systems and relays for proper function.

Replacing the Headlight Bulb

Steps for replacing a burnt-out headlight bulb.

Checking the Tires

Procedures for inspecting tire pressure and condition.

Repairing the Tires

Steps for fixing or maintaining the product's tires.

Examining the V-Belts

Inspecting the drive belts for wear and damage.

Transaxle Cooling Fan Maintenance

How to keep the cooling fan and fins clean for optimal performance.

Examining Transaxle Pump Fluid

Checking the transaxle pump fluid level and for leaks.

Adjusting Front Wheel Toe-in and Camber

Information on the fixed toe-in and camber settings for front wheels.

Replacing the Fuse

Steps for replacing a blown fuse in the product.

Removing and Installing Engine Cover and Grill Assembly

Procedures for accessing and reassembling the engine cover and grill.

Replacing the Drive Belt

Instructions for replacing the main drive belt of the mower.

Cleaning Battery and Terminals

How to clean battery components to ensure good connection and prevent drain.

Replacing the Battery

Step-by-step guide for removing and installing a new battery.

Connecting Jumper Cables

Safety instructions for jump-starting the mower's battery.

Cutting Deck Removal and Installation

Detailed steps for removing and refitting the mower deck.

Removing and Installing the Center Chute

Procedure for detaching and reattaching the central discharge chute.

Precision Side-to-Side Cutting Deck Adjustment

How to achieve a level cut across the mower deck's width.

Adjusting Cutting Deck Parallelism

Steps to adjust the cutting deck for even grass height.

Front-to-Rear Cutting Deck Adjustment

How to adjust the cutting deck's angle from front to rear for optimal cutting.

Replacing the Mower Blades

Instructions for safely removing, replacing, or sharpening the cutting blades.

Removing the Cutting Deck Drive Belt

Steps to detach the drive belt from the cutting deck components.

Adjusting Anti-Scalp Rollers

How to set the anti-scalp rollers to prevent lawn damage.

Lubricating the Engine

Guidance on the type and procedure for lubricating the engine.

Checking Engine Oil Level

Procedure for verifying and topping up the engine oil.

Replacing Engine Oil

Steps for draining old oil and refilling with new engine oil.

Replacing the Engine Oil Filter

Instructions for removing and installing a new oil filter.

Cleaning the Air Filter

How to clean the air filter for optimal engine performance.

Cleaning the Air Screen

Procedure for cleaning the air screen to prevent overheating.

Engine Cooling System Maintenance

Steps to maintain the engine cooling system's cleanliness.

Replacing Spark Plugs

When and how to replace the spark plugs for reliable ignition.

Replacing the In-Line Fuel Filter

Instructions for replacing the fuel filter to ensure proper fuel flow.

Removing Air from the Transmission

Procedure to bleed air from the transmission system.

Troubleshooting

Engine Does Not Start

Common causes and solutions when the engine fails to start.

Starter Motor Issues

Troubleshooting steps for when the starter motor doesn't turn the engine.

Engine Runs Unsmoothly

Diagnosing and fixing issues causing the engine to run poorly.

Engine Overheating

Identifying causes and solutions for engine overheating.

Loss of Power

Troubleshooting steps for reduced engine power.

Product Vibration Issues

Diagnosing and resolving excessive vibration during operation.

Battery Not Charging

Reasons and fixes for the battery not charging.

Engine Stops When Operator Leaves Seat

Troubleshooting the operator presence control system.

Blades Cannot Rotate

Diagnosing and fixing issues preventing the blades from turning.

Defective Grass Discharge

Solutions for problems affecting grass clipping discharge.

Headlight Malfunctions

Troubleshooting steps for when the headlight does not work.

Transportation, Storage, and Disposal

Product Transportation Guidelines

Procedures and safety tips for moving the product.

Tow Safety Instructions

Rules for safely towing the lawn mower with another vehicle.

Product Storage Procedures

Preparing the mower for long-term storage to prevent damage.

Product Disposal Guidelines

Information on environmentally responsible disposal of the product and its components.

Technical Data

Engine Specifications

Details on engine brand, model, output, speed, and fuel/oil types.

Cutting Deck Specifications

Information on blade count, length, cutting width, and height.

Tire Specifications

Details regarding tire pressure and dimensions.

Service

Authorized Service Center Recommendations

Importance of yearly checks at authorized service centers.

Declaration of Conformity

EU Declaration of Conformity

UK Declaration of Conformity

Slopes Sighting Guide for Safe Operation

Husqvarna TC138 Specifications

General

Engine	Husqvarna Series
Engine Power	8.6 kW
Cutting Width	97 cm
Cutting Height Min-Max	38-102 mm
Transmission Type	Hydrostatic
Fuel Tank Volume	5.7 L
Engine Manufacturer	Briggs & Stratton
Oil Filter	Yes
Transmission Manufacturer	Tuff Torq
Cutting Height Steps	6
Blade Engagement	Manual
Blades	2
Nose Roller	No
Seat Manufacturer	Husqvarna
Collector	Included
Mulch Kit	Available as accessory
Fuel Tank Capacity	5.7 L
Hour Meter Type	Digital
Front Tyre Size	15x6-6
Rear Tyre Size	18x8.5-8
Cutting Width (inches)	38 inches
Wheel Size	Front: 15x6-6, Rear: 18x8.5-8
Engine Lubrication Type	Pressure lubrication
Turning Radius, min	41 cm
Cutting Height (inches)	1.5 - 4 "