Husqvarna 550XPG Mark II TrioBrake

Questions and Answers

K
Kevin BarreraJul 29, 2025
Why does my Husqvarna 550XPG Mark II TrioBrake engine start then stop?
- A
  Amanda RogersJul 29, 2025
  Your Husqvarna Chainsaw engine may start and then stop due to several reasons. It could be due to incorrect fuel type, in which case you should drain the fuel tank and fill it with the correct fuel. Another possible cause is a clogged air filter, so you should clean or replace the air filter. Also, a clogged fuel filter could be the reason, so replace the fuel filter to resolve this.
F
fthomasAug 9, 2025
What to do if my Husqvarna Chainsaw engine does not start?
- T
  Tony WardAug 9, 2025
  If your Husqvarna Chainsaw engine does not start, several factors could be the cause. The starter pawls may be blocked, requiring adjustment or replacement. Ensure the fuel type is correct by draining the tank and refilling it. Check the spark plug; it should be clean and dry. Also, make sure that the electrode gap is correct and that the spark plug is tightened. If the engine is flooded due to repeated starts with full choke, remove and clean the spark plug, lay the chainsaw on its side with the spark plug hole facing away from you, pull the starter rope handle 6-8 times, then reassemble the spark plug and attempt to start the chainsaw.
R
Robert KimAug 18, 2025
How to fix a loose spark plug on a Husqvarna Chainsaw?
- T
  Tracy MoodyAug 18, 2025
  If the spark plug on your Husqvarna Chainsaw is loose, tighten the spark plug.

Summary

Symbols on the Product

Safety

Safety Definitions

General Safety Instructions

Provides essential safety guidelines for operating the chainsaw safely.

Safety Instructions for Operation

Details crucial safety precautions to take before and during chainsaw operation.

Personal Protective Equipment

Lists essential protective gear required for safe chainsaw operation.

Safety Devices on the Product

Chain Brake and Front Hand Guard

Chain Brake and Rear Brake Trigger

Throttle Trigger Lockout

Chain Catcher

Right Hand Guard

Muffler

Fuel Safety

Provides critical safety guidelines for handling fuel and refueling.

Safety Instructions for Maintenance

Outlines essential safety precautions before performing maintenance.

Safety Instructions for the Cutting Equipment

Lists safety rules for using cutting tools and accessories.

Assembly

To Assemble the Guide Bar and Saw Chain

Operation

To Do a Function Check Before You Use the Product

Fuel

Fuel Handling

To Mix Gasoline and Two-Stroke Oil

To Fill the Fuel Tank

To Use the Correct Chain Oil

Kickback Information

Explains what kickback is and how to prevent it.

Common Questions About Kickback

Starting the Product

To Prepare to Start with a Cold Engine

To Prepare Start with a Warm Engine

To Start the Product

Detailed steps for safely starting the chainsaw engine.

Cutting Techniques

To Use the Cutting Technique

To Stop the Product

Limbing Technique

To Use the Limbing Technique

Tree Felling

To Calculate the Felling Direction

Steps to determine the safest direction to fell a tree.

To Keep a Safe Distance

Emphasizes maintaining a safe distance during felling operations.

To Use the Tree Felling Technique

Introduces the techniques required for safely felling trees.

Preparing for Felling

To Clear the Trunk and Prepare Your Path of Retreat

Instructions for clearing the work area and planning an escape route.

The Felling Hinge

Explains the critical felling hinge for controlling tree fall direction.

To Make the Directional Cuts

Details how to make precise cuts to guide the tree's fall.

Safe Corner Method

To Use the Safe Corner Method

To Free a Trapped Tree

Warns about the dangers of removing a trapped tree.

Cutting Tensioned Wood

To Cut Trees and Branches That Are in Tension

Maintenance

Maintenance Schedule

Outlines daily, weekly, and monthly maintenance tasks.

Safety Device Checks

To Do a Check of the Brake Band

Instructions for checking the condition of the brake band.

To Do a Check of the Front Hand Guard and Chain Brake Activation

How to inspect the front hand guard and chain brake mechanism.

To Do a Check of the Chain Brake

Procedure to test the functionality of the chain brake.

To Do a Check of the Throttle Trigger and Throttle Trigger Lockout

How to check the throttle trigger and lockout for proper operation.

Component Checks

To Do a Check of the Chain Catcher

Inspects the chain catcher for damage and secure attachment.

To Do a Check of the Right Hand Guard

Verifies the right hand guard is undamaged and free of defects.

To Do a Check of the Start;Stop Switch

Tests the start/stop switch to ensure it correctly stops the engine.

To Do a Check of the Muffler

Inspects the muffler for damage and proper attachment.

Air Filter and Spark Plug

To Clean the Air Filter

To Do a Check of the Spark Plug

Saw Chain Sharpening

Saw Chain Sharpening Details

General Information About How to Sharpen the Cutters

Cutting Teeth Adjustment

To Sharpen the Cutters

Step-by-step guide for sharpening the cutting teeth of the saw chain.

To Adjust the Tension of the Saw Chain

Instructions for adjusting the saw chain tension for safety and performance.

Saw Chain Maintenance

To Do a Check of the Saw Chain Lubrication

How to verify the saw chain is receiving adequate lubrication.

Cutting Equipment Inspection

To Examine the Cutting Equipment

To Do a Check of the Guide Bar

Tank and Oil System Maintenance

To Do Maintenance on the Fuel Tank and the Chain Oil Tank

To Adjust the Chain Oil Flow

Troubleshooting

The Engine Does Not Start

The Engine Starts But Stops Again

Husqvarna 550XPG Mark II TrioBrake Specifications

General

Cylinder Displacement	50.1 cm³
Maximum Power Speed	10200 rpm
Chain Pitch	0.325"
Recommended Bar Length, Min-Max	13-20 in
Weight (excl. cutting equipment)	5.5 kg
Heated Handle	Yes
Sound Power Level	116 dB(A)
Vibration Level (left/right handle)	3.3/4.9 m/s²
Chain Gauge	0.050"