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Cub Cadet BC490 - User Manual

Cub Cadet BC490
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769-09454 / 00 11/13
4-Cycle Trimmer / Brushcutter
BC490
TABLE OF CONTENTS
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Oil and Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
All information, illustrations, and specifications in this manual are based
on the latest product information available at the time of printing. We
reserve the right to make changes at any time without notice.
Copyright© 2013 MTD SOUTHWEST INC, All Rights Reserved.
SAVE THESE INSTRUCTIONS
SERVICE
DO NOT RETURN THIS UNIT TO THE RETAILER. PROOF OF
PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
For assistance regarding the assembly, controls, operation or
maintenance of the unit, please call the Customer Support Department
at 1-877-282-8684 in the United States or 1-800-668-1238 in Canada.
Additional information about the unit can be found on our website:
www.cubcadet.com (U.S.) or www.cubcadet.ca (Canada).
For service, please call the Customer Support Department to obtain
a list of authorized service dealers near you. Service on this unit,
both within and after the warranty period, should only be performed
by an authorized and approved service dealer. When servicing, use
only identical replacement parts.
IMPORTANT: Read this manual thoroughly before using this product. Follow all instructions.
Operator’s Manual

Table of Contents

Questions and Answers

  • W
    wardcarlyJul 27, 2025
    How to start a Cub Cadet BC490 that won't start?
    • M
      Ms. Jessica HarrisJul 27, 2025
      If your Cub Cadet Trimmer engine won't start, several factors could be responsible. First, ensure the fuel tank isn't empty and fill it with fresh fuel if needed. If the fuel is old (over 30 days), drain the tank and add fresh fuel. Also, make sure you've pressed the primer bulb 10 times. A fouled spark plug can also prevent starting, so replace it if necessary. Finally, if the engine is hot, consult the 'IF... THE ENGINE IS HOT' instructions in the Starting and Stopping section.
  • J
    jonhendersonJul 31, 2025
    What to do if the cutting head of my Cub Cadet BC490 will not advance line?
    • R
      Rachel SanchezJul 31, 2025
      If the cutting head of your Cub Cadet Trimmer won't advance the line, several issues could be the cause. First, stop the engine and check if the cutting head is bound with grass and clean it. If the cutting head is out of line, refill it with new line. A bound inner reel can also cause this, so clean the inner reel and outer spool. If the cutting head is dirty, open it and remove any welded sections. Also, rewind the line if it's welded or twisted. If not enough line is extended, stop the unit, push the bump knob, and pull the line until 4 inches (102 mm) is outside of the cutting head.
  • J
    John LongAug 6, 2025
    Why is the cutting line of my Cub Cadet Trimmer advancing uncontrollably?
    • S
      Susan SpearsAug 6, 2025
      If the cutting line on your Cub Cadet Trimmer advances uncontrollably, it's likely due to oil, cleaner, or lubricant in the cutting head. Clean and thoroughly dry the cutting head to resolve this issue.
  • T
    Taylor ButlerAug 11, 2025
    Why does my Cub Cadet Trimmer engine lack power or stall?
    • K
      Kendra SilvaAug 11, 2025
      If your Cub Cadet Trimmer engine lacks power or stalls, the issue might be due to several reasons. Old fuel (over 30 days) can cause this, so drain the fuel tank and add fresh fuel. A dirty air filter can also lead to power loss, so clean or replace it. Lastly, a fouled spark plug could be the culprit, so consider replacing it.
  • L
    longmaryAug 16, 2025
    What to do if my Cub Cadet Trimmer engine will not accelerate?
    • K
      Kevin RiceAug 16, 2025
      If your Cub Cadet Trimmer engine won't accelerate, it could be due to a few reasons. Old fuel (over 30 days) can cause this, so drain the fuel tank and add fresh fuel. Also, check if the cutting head is bound with grass; if so, stop the engine and clean it. A dirty air filter can also prevent acceleration, so clean or replace it.
  • L
    Lisa CochranAug 21, 2025
    Why my Cub Cadet Trimmer engine will not idle?
    • W
      William StephensAug 21, 2025
      If your Cub Cadet Trimmer engine won't idle, it could be due to a dirty air filter, so you should clean or replace it. Another cause may be old fuel (over 30 days), in which case you should drain the fuel tank and add fresh fuel. Also, the idle speed may be incorrect, so try adjusting it.

Summary

SAFETY

IMPORTANT SAFETY INSTRUCTIONS

General rules and precautions for safe operation of the unit.

OPERATIONAL SAFETY GUIDELINES

Covers fuel handling, general operation, trimmer, and brushcutter safety rules.

ASSEMBLY

INSTALLING THE CUTTING HEAD SHIELD

OIL AND FUEL

USING THE RIGHT OIL

Specifies the correct type and quality of engine oil to use.

ADDING OIL: INITIAL USE

USING THE RIGHT FUEL

Guidelines for selecting and using gasoline, blended fuels, and additives.

FUELING THE UNIT

STARTING AND STOPPING

STARTING INSTRUCTIONS

Step-by-step guide to start the engine safely.

STOPPING INSTRUCTIONS

OPERATION

HOLDING THE UNIT

MAINTENANCE

MAINTENANCE SCHEDULE

TRIMMING LINE AND BLADE REPLACEMENT

ENGINE MAINTENANCE

Includes checking oil, changing oil, air filter, idle speed, and spark plug service.

CLEANING AND STORAGE

STORAGE

TROUBLESHOOTING

TROUBLESHOOTING GUIDE

Provides solutions for common engine and operational problems.

Cub Cadet BC490 Specifications

General IconGeneral
BrandCub Cadet
ModelBC490
CategoryTrimmer
LanguageEnglish

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