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DEK 3850 - User Manual

DEK 3850
14 pages
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Rev: Sept 2009
DEK® is exclusively distributed by GXi International, LLC
1 of 14
Heavy Duty Power Equipment
Owners Manual
This manual contains important safety instructions for gasoline engine
powered electric generator models: 3850, 4000, 4550 Pro, 5000, 5000EL, 5650, 5650EL, 6500, 6500EL,
7550EL Pro, 180W, 180WEL.
READ SAFETY WARNINGS AND OPERATING INSTRUCTIONS CAREFULLY, SAVE THESE INSTRUCTIONS.
Contents:
1. Tools and Accessories
2. Warnings & Specifications
3. Component Identification
4. Wheel Kit Assembly
5. Controls
6. Operating the Generator
7. Maintenance
8. Transporting and Storage
9. Troubleshooting
10. Warranty and Service
HAVE QUESTIONS OR NEED HELP?
call 24 hrs / 7-days a week help-line: [1] 800-393-0668
or go to www.DEKPowerUSA.com
DO NOT RETURN THIS GENERATOR
TO THE STORE!
Date of Purchase: _______________________
Location of Purchase: _______________________
Serial #: _______________________
Have the following information ready when you call us:
DEK® is registered trademark of GXi International, LLC Clayton, NC 27520 USA
No part of this publication can be printed or copied without written permission.
®

Questions and Answers

  • J
    Jessica WangAug 29, 2025
    Why is fuel leaking from my DEK Inverter's carburetor?
    • L
      Leonard SmithAug 29, 2025
      If fuel is leaking out of the carburetor of your DEK Inverter, the fuel drain screw might be loose; tighten it. Alternatively, the carburetor float seat may not be seating properly; flush it with clean fuel.
  • J
    Jonathan TravisAug 28, 2025
    Why is my DEK Inverter engine running rough?
    • K
      Karen MillerAug 28, 2025
      If your DEK Inverter engine runs roughly, vibrates, or oscillates, here are some potential causes and solutions: Ensure the choke is fully open by pushing the choke lever in. Reduce the load on the generator by disconnecting some appliances if you're overloading it. Check the air filter and clean it if it's dirty. A clogged fuel filter can also cause this issue, so clean it. If the vacuum check valve has failed, replace it. If the head valve timing is off, it is recommended to send it to a service center.
  • S
    Sydney BurtonAug 27, 2025
    What to do if DEK Inverter starts then shuts off quickly?
    • J
      Jacqueline ThomasAug 27, 2025
      If your DEK Inverter engine starts but shuts off quickly, check the following: Ensure the oil level is adequate by consulting the owner's manual for the correct oil capacity. Verify that the fuel valve is open and the tank isn't empty. Inspect the spark plug for fouling or failure, and clean or replace it as necessary. A failed vacuum check valve could also be the problem; replace it, and call DEK for the replacement procedure.
  • D
    David LeeAug 27, 2025
    DEK Inverter shows voltage but no power to devices, what's wrong?
    • R
      Ryan ClarkAug 27, 2025
      If your DEK Inverter shows both 240VAC and 120VAC on the voltmeter, but connected devices aren't receiving power, here's what you can check: First, try a different extension cord or power strip, as the current one may be faulty. Ensure the device you're using hasn't failed by testing with a different light bulb or device. Also, verify that the push-button breaker hasn't tripped. Finally, check the GFCI; if it's tripped, push the red reset button firmly, and if it has failed, replace it with any standard GFCI or household outlet.
  • J
    Jennifer AcostaAug 25, 2025
    Why does my DEK Inverter engine bog down under load?
    • M
      Matthew HardinAug 26, 2025
      If your DEK Inverter engine runs but bogs down under load, consider these potential causes: The choke might be open, so push the choke lever in. You might be overloading the generator, in which case you should disconnect some appliances or devices. A dirty air filter or a clogged fuel filter could also be the culprit, so clean the air filter and clean the fuel filter.
  • M
    Mrs. Alexis TaylorAug 25, 2025
    What to do if my DEK Inverter shows voltage but no outlet power?
    • M
      Michael BooneAug 25, 2025
      If your DEK Inverter's voltmeter shows 120 VAC but the outlets aren't providing power, the issue might stem from a faulty extension cord or power strip; try using a different one. Also, check the push-button breaker and reset it if it's tripped by disconnecting all loads and pushing the reset button. Similarly, examine the GFCI; if tripped, disconnect all loads and firmly push the red reset button. If the GFCI has failed, consider replacing it with any standard GFCI or household outlet.

DEK 3850 Specifications

General IconGeneral
BrandDEK
Model3850
CategoryPortable Generator
LanguageEnglish

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