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DEK 5650 - User Manual

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DEK® is registered trademark of GXi Outdoor Power, LLC Clayton, NC 27520 USA.
No part of this publication can be printed or copied without written permission.
1 of 16 Rev. 9/2011
Heavy Duty Power Equipment
®
Owners Manual
This manual contains important safety instructions for gasoline
generator models: 4550Pro, 5650, 6500, 6500EL, 7550EL Pro that should be followed during installation and
maintenance of the generator and batteries
READ SAFETY WARNINGS AND OPERATING INSTRUCTIONS CAREFULLY, SAVE THESE INSTRUCTIONS.
Contents:
1. Tools and Accessories
2. DEK Product Lines
3. Missing Parts Request Form
4. Warnings
5. Warnings and Specifications
6. Component Identification
7. Wheel Kit Assembly & Commissioning the Battery
8. Commissioning the Battery
9. Controls
10. Operating the Generator
11. Operating the Generator
12. Maintenance
13. Maintenance
14. Transporting and Storage
15. Troubleshooting
16. Warranty and Service
HAVE QUESTIONS OR NEED HELP?
call 24 hrs / 7-days a week help-line: [1] 919-550-3221
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:
®

Questions and Answers

  • M
    Mary NelsonSep 23, 2025
    What could cause my DEK Portable Generator to show incorrect voltage in 240V mode?
    • K
      Kyle SampsonSep 23, 2025
      If your generator runs and the voltmeter shows 120VAC in 120V mode, but shows 120VAC or 0VAC in 240V mode, it could be due to: * A failed circuit breaker. * A failed toggle switch. * A failed alternator phase. * A broken wire.
  • S
    Scott CardenasAug 25, 2025
    What to do if my DEK Inverter shows voltage but no outlet power?
    • S
      stacey76Aug 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.
  • D
    Deborah MirandaAug 25, 2025
    Why does my DEK Inverter engine bog down under load?
    • B
      Brett CurtisAug 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.
  • A
    Ann FisherAug 27, 2025
    DEK Inverter shows voltage but no power to devices, what's wrong?
    • J
      Julia BarkerAug 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
    Jeffery JonesAug 27, 2025
    What to do if DEK Inverter starts then shuts off quickly?
    • J
      Joseph RossAug 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.
  • S
    Stephen WilliamsSep 14, 2025
    Why is the recoil on my DEK 5650 hard to pull?
    • S
      Sandra AdkinsSep 14, 2025
      The recoil on your generator might be hard to pull or not retracting due to: * A dirty spark arrestor. Remove, clean, and replace it. * The recoil rubbing on a dented housing. * A failed alternator bearing. The alternator bearing needs to be replaced. It is recommended to send it to a service center. * A failed camshaft detent. * The head valve timing being off.
  • T
    trevorwallerSep 12, 2025
    Why is my DEK 5650 Portable Generator voltage too high or low?
    • N
      nicolepageSep 12, 2025
      If you're experiencing voltage issues with your generator, consider the following: * The spark arrestor may be the cause. Remove, clean, and replace it. * The voltage may not be measured correctly. Voltage must be measured between hot and neutral, not hot and ground, as the ground is isolated. * The speed screw could be bent.
  • M
    Matthew JohnsonSep 13, 2025
    How to fix a fuel leak at the tank shut-off on my DEK 5650 Portable Generator?
    • V
      Vanessa DavisSep 13, 2025
      If you notice a fuel leak at the tank shut-off, it's likely due to a loose shut-off valve. Try tightening the nut on the shut-off valve. If that doesn't solve the problem, you may need to replace the shut-off valve.
  • K
    Karen RodriguezSep 4, 2025
    How to fix a leaking fuel gauge on a DEK Inverter?
    • G
      Gina HernandezSep 4, 2025
      To address a fuel gauge leak in your DEK Inverter, replace the fuel gauge gasket.
  • A
    Amanda PonceSep 2, 2025
    Why is oil leaking from the valve head cover on my DEK Inverter?
    • A
      aaronleeSep 2, 2025
      If oil is leaking from the valve head cover of your DEK Inverter, the bolts might not be tight enough. Tighten the bolts to resolve the leak.

Summary

DEK Product Lines

Generator Accessories Overview

Covers universal generator covers, motor oil, adapters, extension cords, and fuel stabilizers.

Missing Parts Request Form

Other DEK Power Equipment

Showcases other DEK heavy duty power equipment like mowers, washers, and shredders.

Warnings and Safety Precautions

Fire, Burn, and Electrocution Hazards

Details hazards related to fire, burns, electrocution, and essential safety precautions.

Carbon Monoxide Gas Hazard

Explains the dangers of carbon monoxide and safe operating locations.

Product Specifications

AC Application Safety and Operation

Provides guidelines for connecting appliances and safety precautions for operation.

Component Identification

Generator Exterior and Control Panel

Identifies exterior components and the control panel of the generator.

Assembly and Battery Setup

Wheel Kit Assembly Guide

Step-by-step instructions for assembling the wheel kit.

Battery Commissioning Procedure

Guidance on connecting and maintaining the optional battery.

Controls - DC and Battery Connections

DC Terminals and Usage Warning

Explains the generator's DC terminals and the warning about simultaneous AC/DC use.

Battery Cable Connection Steps

Detailed procedures for connecting and disconnecting the battery charging cables.

Generator Controls and Systems

Engine Starting System Operation

Describes the operation of the recoil and electric starter systems.

Fuel Valve, Oil Alert, and Grounding

Explains the fuel valve, oil alert system, and ground terminal.

Operating the Generator - Initial Steps

Carbon Monoxide Safety

Crucial safety information regarding CO hazards and proper ventilation.

Pre-Operation Checks & Fueling

Details steps for checking oil level, fuel, and proper fueling practices.

Ethanol Fuel Advisory

Important warning about using gasoline with ethanol blends.

Operating the Generator - Load & Shutdown

Generator Startup and Load Application

Steps for starting the generator and applying electrical loads.

Generator Shutdown Procedure

Procedures for safely shutting down the generator in normal and emergency situations.

Maintenance Procedures

Engine Oil and Air Cleaner Maintenance

Instructions for engine oil changes and air cleaner maintenance.

Fuel Filter and Spark Plug Service

Guidance on fuel filter cleaning and spark plug maintenance.

Maintenance, Transport, and Storage

Spark Arrestor and Fuse Checks

Procedures for cleaning the spark arrester and replacing the starter motor fuse.

Transporting and Storing the Unit

Safety precautions and procedures for moving and storing the generator.

Troubleshooting Engine Problems

Engine Wont Start or Stalls

Lists potential causes and solutions for engine starting and stalling problems.

Recoil and Quick Stalling Issues

Addresses issues with the recoil starter and engines shutting off soon after starting.

Troubleshooting Output and Leaks

No Power to Connected Devices

Solutions for when the generator runs but no power reaches connected devices.

Voltage, Leaks, and Fuel Gauge Issues

Diagnoses voltage problems, oil/fuel leaks, and fuel gauge issues.

Limited Warranty and Service

Warranty Coverage and Exclusions

Outlines the warranty period for different generator components and key exclusions.

Obtaining Warranty Service

Provides instructions on how to get warranty service and contact DEK Customer Service.

DEK 5650 Specifications

General IconGeneral
BrandDEK
Model5650
CategoryPortable Generator
LanguageEnglish

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