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Centurion 4986 - User Manual

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• Safety
• Assembly
• Operation
• Maintenance
• Troubleshooting
• Electrical Data
• Parts
• Warranty
FOR YOUR NEAREST
AUTHORIZED SERVICE
CENTER 1-800-333-1322
Owner’s
Manual
COMMERCIAL • INDUSTRIAL • RESIDENTIAL
MODELS:
04986 (12,500 Watt)
04987 (15,000 Watt)
Part No. 0E8082 Rev. D 11.03, 9.04, 10.04, 9.05
www.centuriongenerators.com
Printed in USA

Table of Contents

Questions and Answers

  • M
    Melanie FergusonJul 29, 2025
    Why won't my Centurion 4986 start or runs rough?
    • R
      Rachel BallardJul 29, 2025
      If your Centurion Portable Generator's engine won't start or runs roughly, here are a few things to check: * Ensure the air cleaner is clean, and replace or clean it if it’s dirty. * Make sure you have gasoline in the fuel tank; if not, fill it. * If the gasoline is stale, drain the tank and add fresh fuel. * Confirm the spark plug wire is connected to the spark plug, and replace the spark plug if it’s bad. * Also, ensure there's no water in the gasoline by draining the tank and refilling with fresh fuel. * Check that you haven't overchoked the engine; if so, move the choke knob to the 'No Choke' position. * Verify that the oil level is adequate and fill the crankcase to the correct level if it's low.
  • R
    Robin MichaelAug 3, 2025
    How to fix Centurion 4986 with no AC output?
    • M
      Meagan JohnsonAug 3, 2025
      If your Centurion Portable Generator engine is running but there's no AC output, try these solutions: * First, reset the circuit breaker, as it may be open. * Then, check the cord set for poor connections or defects and repair if necessary. * Make sure the connected device is working correctly by testing with another device in good condition.
  • J
    Jacob WadeAug 7, 2025
    What to do if my Centurion 4986 Portable Generator shuts down?
    • C
      Charlene BrooksAug 7, 2025
      If your Centurion Portable Generator shuts down during operation, the possible causes include: * The unit is out of gasoline, so you should fill the fuel tank. * The oil level is low, so you should fill the crankcase to the proper level.
  • M
    Marissa GriffinAug 11, 2025
    Why does my Centurion Portable Generator bog down under load?
    • N
      Nancy Hoffman DVMAug 11, 2025
      If the engine on your Centurion Portable Generator runs well but bogs down when loads are connected, there are several potential causes. One possible cause is a short circuit in a connected load, so you should disconnect any electrical load that is shorted. Another possible cause is that the generator is overloaded.
  • A
    Amber RiveraAug 15, 2025
    Why does my Centurion 4986 lack power?
    • S
      stephen13Aug 16, 2025
      If your Centurion Portable Generator engine lacks power or falters, consider these potential causes: * The load might be too high. * The air filter might be dirty, so replace it. * The choke might be opened too soon; move it to the halfway position until the engine runs smoothly.
  • S
    Seth Williams DVMAug 20, 2025
    How to fix Centurion Portable Generator that will not crank?
    • J
      John ThomasAug 20, 2025
      If your Centurion Portable Generator won't crank, it might be due to a blown 10-amp fuse at the rear of the generator control panel. Replace the fuse, using only an identical 10-amp replacement fuse.
  • H
    haneymarkAug 25, 2025
    What to do if Centurion 4986 Portable Generator has no DC output?
    • G
      guerrerojonAug 25, 2025
      If there's no Battery Charge DC output from your Centurion Portable Generator, here are a few things to check: * Clean the battery posts if they are corroded. * Replace the battery cable if it is bad. * Check the battery condition and replace it if defective.

Summary

Safety Rules

General Safety Precautions

Crucial safety precautions and hazard warnings for generator operation.

Electrical and Fire Hazards

Warnings related to electrical shock, fire, and explosion risks.

Handling Fuel and Emissions

Safe practices for adding gasoline and understanding exhaust emissions.

Warranty Information

Two-Year Limited Warranty

Details the two-year limited warranty for Centurion generators.

Emission Control System Warranty

Generator Operation

Preparation and Startup

Troubleshooting and Storage

Troubleshooting Common Issues

A guide for diagnosing and resolving typical generator problems.

Generator Storage Guidelines

Centurion 4986 Specifications

General IconGeneral
Power Output120V/240V
Engine Type4-Stroke OHV
Fuel Tank Capacity4 Gal
Noise Level68 dB
Starting SystemRecoil
Outlet Types1x 120/240V 30A
Fuel Tank Capacity (L)15.1 L

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