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Champion 100641 - User Manual

Champion 100641
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OPERATOR'S MANUAL
MODEL #100641
CHAINSAW
REV 20210426 Champion Power Equipment, Inc., Santa Fe Springs, CA USA
or visit championpowerequipment.com
READ AND SAVE THIS MANUAL. This manual contains important safety precautions which should be read and understood before operating the product. Failure to
do so could result in serious injury. This manual should remain with the product.
Specifications, descriptions and illustrations in this manual are as accurate as known at the time of publication, but are subject to change without notice.
REGISTER YOUR PRODUCT ONLINE
at championpowerequipment.com

Table of Contents

Questions and Answers

  • N
    Nicholas SmithAug 5, 2025
    What to do if my Champion 100641 engine lacks power or stalls?
    • C
      Christian MiddletonAug 5, 2025
      If your Champion Chainsaw engine lacks power or stalls, it could be due to several reasons. One common cause is old or improperly mixed fuel; in this case, drain the fuel tank and add fresh, properly mixed fuel. A dirty air filter can also lead to this issue, so clean or replace it. Lastly, a faulty spark plug can cause power loss or stalling, so refer to 'Maintaining the Spark Plug'.
  • G
    Gabriel CarlsonAug 10, 2025
    How to fix Champion 100641 engine that will not idle?
    • L
      Lisa DixonAug 10, 2025
      If your Champion Chainsaw engine won't idle, there are a few potential causes. A dirty air filter can prevent proper idling, so try cleaning or replacing it. Old or improperly mixed fuel is another common reason; drain the fuel tank and add fresh, properly mixed fuel. Lastly, the idle speed might be incorrect, so adjust it accordingly.
  • F
    feliciawhitakerAug 15, 2025
    What to do if my Champion 100641 Chainsaw engine will not accelerate?
    • N
      Nicole StevensAug 15, 2025
      If your Champion Chainsaw engine will not accelerate, the issue could stem from a couple of factors. The fuel might be old (over 30 days) or improperly mixed; if so, drain the fuel tank and add fresh, properly mixed fuel. Alternatively, a dirty air filter could be restricting airflow, so clean or replace the air filter.
  • A
    Anthony MooreAug 19, 2025
    Why Champion Chainsaw guide bar and saw chain are running hot, smoking or stuck?
    • Q
      qsmithAug 19, 2025
      If the guide bar and saw chain on your Champion Chainsaw are running hot, smoking, or stuck, consider these possibilities: The saw chain tension may be too tight, requiring you to adjust the saw tension. The chain oil reservoir might be empty, so refill it. The guide bar groove and oil passages could be dirty, necessitating a cleaning. Finally, the automatic oiler flow might be too low; in that case, increase the oil flow.
  • M
    Michael WilcoxAug 23, 2025
    What to do if Champion 100641 saw chain does not rotate?
    • G
      Gregory ShafferAug 23, 2025
      If the saw chain on your Champion Chainsaw doesn't rotate, several issues could be the cause. First, check if the chain brake is engaged and disengage it. The saw chain tension might be too tight, requiring adjustment. Also, the guide bar and saw chain could be assembled incorrectly, so refer to 'Moving and Installing the Guide Bar and Saw Chain'. Inspect the guide bar and saw chain for any damage, and replace them if needed. Finally, if the drive assembly is damaged, refer to 'Service information'.
  • D
    danielle72Aug 27, 2025
    Why Champion Chainsaw saw chain rotates, but does not cut?
    • L
      Latoya McclureAug 27, 2025
      If the saw chain on your Champion Chainsaw rotates but doesn't cut, it's likely due to one of two reasons: either the saw chain is dull, requiring you to sharpen or replace it, or the saw chain is on backwards, so check and correct the saw direction.
  • M
    Matthew WongOct 31, 2025
    Why my Champion 100641 engine will not start?
    • L
      Lauren RiveraNov 1, 2025
      If your Champion Chainsaw engine won't start, several factors could be at play. First, ensure the fuel tank isn't empty and is filled with properly mixed fuel. If the fuel tank is full, make sure you've pressed the purge bulb 10 times, or until fuel is visible. Another cause might be a vapor-locked carburetor; to resolve this, open the fuel cap to release vapor, then press the purge bulb 20 times or more until it's 60-75% full of fuel, and let the engine cool. If the engine is flooded, move the choke knob to Position 2, press the throttle lockout, squeeze the throttle control, and pull the starter rope. Old or improperly mixed fuel can also be the culprit, so drain the tank and refill it with fresh fuel. Finally, the spark plug may not be working correctly, so refer to 'Maintaining the Spa...

Summary

Introduction

Safety Definitions

Explains safety symbols, their meanings, and warnings for hazard identification.

Important Safety Instructions

Fuel Safety

Covers hazards associated with gasoline, including flammability and explosion risks.

While Operating

Details essential safety precautions to follow during chainsaw operation.

Kickback Safety

Explains kickback causes, types, and precautions to prevent injury.

Other Safety Warnings

Provides additional safety advice, including maintenance and storage precautions.

Safety Labels

Identifies and explains the purpose of various safety labels on the chainsaw.

Safety Symbols

Details common symbols used on the product and their meanings for safe operation.

Quickstart Label Symbols

Explains symbols found on quickstart labels for rapid product understanding.

Controls and Features

Chainsaw Controls

Identifies and labels the various controls and features of the chainsaw.

Safety Features

Describes the safety features incorporated into the chainsaw design for user protection.

Assembly

Adding Bar and Chain Oil

Instructions for filling the chain oil reservoir for initial use.

Adjusting Chain Tension

Guidance on setting the correct chain tension before initial operation.

Oil and Fuel Mixing Instructions

Details on correctly mixing gasoline and 2-cycle oil for the chainsaw engine.

Operation

Starting and Stopping

Step-by-step guide for starting and stopping the chainsaw safely.

Tips for Best Results

Provides advice for optimal performance and safe chainsaw usage.

Preparing the Work Area

Instructions on clearing and preparing the work area before operation.

Holding the Chainsaw

Proper techniques for gripping and holding the chainsaw during operation.

Wedges and Recommended Tools

Lists necessary tools and accessories for safe and effective chainsaw use.

Cutting Procedure Basics

General guidelines and techniques for making various cuts with the chainsaw.

Felling Safety

Critical safety precautions to follow when felling trees.

Felling Procedure

Step-by-step instructions for felling trees, including undercut and back cut.

Limbing

Process and safety tips for removing branches from a fallen tree.

Bucking Safety

Safety precautions for cutting a fallen tree into logs of desired lengths.

Bucking Procedure

Methods for cutting logs, including cutting under stress and fully supported.

Pruning

Step-by-step guide for cutting limbs from a living tree.

Maintenance

Maintenance Schedule

Outlines the recommended maintenance procedures and their frequencies.

Adding Bar and Chain Oil

Instructions for filling the chain oil reservoir to ensure lubrication.

Adjusting Bar and Chain Oil Flow

How to adjust the flow rate of bar and chain oil for proper lubrication.

Adjusting the Chain Tension

Procedures for checking and adjusting the saw chain tension for optimal performance.

Removing and Installing Guide Bar and Saw Chain

Steps for safely removing and reinstalling the guide bar and saw chain.

Maintaining the Saw Chain

Guidance on keeping the saw chain sharp and properly maintained for efficient cutting.

Sharpening the Saw Chain

Detailed instructions on how to sharpen the chainsaw chain correctly.

Lubricating Guide Bar Sprocket Tip

Steps for lubricating the guide bar sprocket tip for smooth operation.

Replacing Guide Bar and Saw Chain

Instructions on how to replace worn or damaged guide bars and saw chains.

Maintaining the Air Filter

Procedure for cleaning and maintaining the air filter for engine performance.

Adjusting the Idle Speed

How to adjust the engine's idle speed for proper operation.

Maintaining the Spark Plug

Steps for inspecting, cleaning, and maintaining the spark plug.

Storage

Cleaning

Instructions for cleaning the chainsaw before storage or after use.

Long-term Storage

Guidelines for storing the chainsaw for periods of 30 days or more.

Preparing for Use After Long-term Storage

Steps to take to prepare the chainsaw after it has been stored for an extended period.

Specifications

Chainsaw Specifications

Technical details and specifications for the chainsaw model.

Replacement Parts

Information on ordering replacement parts for the chainsaw.

Troubleshooting

Warranty

Warranty Qualifications

Requirements and process for registering the product for warranty service.

Repair;Replacement Warranty

Details the terms and duration of the warranty for repairs and replacements.

Contact Information

Provides contact details for customer service and technical support.

Emission Control System Warranty

Your Warranty Rights and Obligations

Explains the rights and responsibilities related to the emission control system warranty.

Manufacturers Emission Control Warranty

Details the coverage period and terms for the emission control system warranty.

Owner Warranty Responsibilities

Outlines the owner's duties for maintaining the emission control system.

To Obtain Warranty Service

Instructions on how to obtain warranty service for the emission control system.

Champion 100641 Specifications

General IconGeneral
Engine Type2-stroke
Engine Displacement42 cc
Bar Length18 in.
Power Output1.2 kW
Weight14.1 lbs
Chain Pitch0.325 inches
Chain Gauge0.050 inches