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DEK 6500 - 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

  • D
    Dr. Jessica Obrien MDSep 23, 2025
    What could cause my DEK 6500 to show incorrect voltage in 240V mode?
    • M
      Mark DavisSep 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.
  • N
    Nicole LyonsAug 25, 2025
    What to do if my DEK Inverter shows voltage but no outlet power?
    • D
      dominguezericAug 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.
  • L
    Linda WallaceAug 25, 2025
    Why does my DEK Inverter engine bog down under load?
    • S
      Susan RoachAug 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.
  • J
    Jennifer WoodsAug 27, 2025
    DEK Inverter shows voltage but no power to devices, what's wrong?
    • D
      Dustin PowersAug 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.
  • V
    vramirezAug 27, 2025
    What to do if DEK Inverter starts then shuts off quickly?
    • M
      Michelle RichardsonAug 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.
  • J
    Joshua CooperSep 14, 2025
    Why is the recoil on my DEK 6500 hard to pull?
    • J
      Jonathan SmithSep 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.
  • S
    Sandra OsborneSep 12, 2025
    Why is my DEK 6500 Portable Generator voltage too high or low?
    • G
      Gerald CarsonSep 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.
  • J
    joshuasmithSep 13, 2025
    How to fix a fuel leak at the tank shut-off on my DEK 6500 Portable Generator?
    • C
      careylouisSep 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
    Kelly ByrdSep 4, 2025
    How to fix a leaking fuel gauge on a DEK Inverter?
    • D
      Dylan WilliamsSep 4, 2025
      To address a fuel gauge leak in your DEK Inverter, replace the fuel gauge gasket.
  • C
    Cody HeathSep 2, 2025
    Why is oil leaking from the valve head cover on my DEK Inverter?
    • A
      Adam WalkerSep 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

Owners Manual

Safety Warnings and Operating Instructions

Read safety warnings and operating instructions carefully and save them.

Generator Information and Contact

Details generator models and provides contact information for support.

DEK Product Lines

Universal Generator Cover

Protective cover for generators to shield from weather, dust, and dirt.

SAE 10 W30 Motor Oil

Premium high-performance oil recommended for DEK generators.

Generator Accessories

Includes adapters, extension cords, and fuel stabilizer for generator use.

Missing Parts Request and Other Products

Other DEK Products

Overview of other outdoor power equipment offered by DEK.

Missing Parts Request Form

Form to request missing parts with contact information for support.

Safety Warnings and Hazards

California Proposition 65 Warning

Engine exhaust contains chemicals known to cause cancer or birth defects.

Fire, Burn, and CO Hazards

Precautions for fire, burns, and carbon monoxide poisoning from engine exhaust.

Electrocution and Grounding Safety

Safety instructions for preventing electrocution and ensuring proper grounding.

AC Applications and Safety Precautions

AC Application Safety

Guidelines for connecting appliances to the generator safely.

Maintenance Safety Precautions

Safety measures to follow before performing maintenance or repairs.

Product Specifications

Detailed technical specifications for various DEK generator models.

Component Identification

Generator Top View Identification

Identifies key components visible from the top of the generator.

Generator Control Panel and Bottom View

Details the control panel layout and identifies components on the lower section.

Wheel Kit Assembly and Battery Commissioning

Wheel Kit Assembly

Step-by-step guide for assembling the wheel kit onto the generator.

Battery Commissioning

Instructions for preparing and connecting the optional battery.

Battery Maintenance

Routine maintenance tips to ensure battery good condition and service life.

Generator Controls and Battery Connections

DC Terminals and Usage

Information on DC terminals, 12V receptacle, and cigarette lighter outlet.

Connecting Battery Cables

Procedure for correctly connecting battery charging cables to the generator.

Disconnecting Battery Cables

Procedure for safely disconnecting battery charging cables from the generator.

Engine Controls and Starting Systems

Engine Oil and Fuel Valve

Instructions on checking engine oil and operating the fuel valve.

Choke, Oil Alert, and Grounding

Explanation of choke operation, oil alert system, and ground terminal usage.

Engine Starting Systems

Details on using the recoil starter and electric starter.

Operating the Generator: Preparation

Carbon Monoxide and Ethanol Warnings

Critical safety warnings regarding CO gas and ethanol fuel use.

Pre-Operation Checks

Steps for checking electrical loads, oil level, and fuel before starting.

Operating the Generator: Running and Stopping

Starting and Applying Loads

Procedure for starting the engine, warm-up, and connecting electrical loads.

Maximum Load Calculation

How to determine the maximum safe load and understand appliance surge requirements.

Stopping the Generator

Step-by-step instructions for safely shutting down the generator.

Generator Maintenance

Maintenance Schedule and Parts

Schedule for regular maintenance and recommendations for genuine parts.

Engine Oil Change Procedure

Detailed steps for draining, refilling, and checking engine oil.

Air Cleaner, Fuel Filter, and Spark Plug Service

Instructions for servicing air cleaner, fuel filter, and spark plug.

Advanced Maintenance and Storage

Spark Plug Inspection and Tightening

Details on inspecting spark plug condition, gapping, and proper installation.

Spark Arrestor and Fuse Maintenance

Procedures for cleaning the spark arrestor and replacing the starter fuse.

Transporting and Storing the Generator

Guidelines for safely transporting and preparing the generator for storage.

Troubleshooting Generator Problems

Engine Starting and Running Issues

Diagnosing and resolving problems with engine start, rough running, or shutdown.

Load and Power Output Issues

Troubleshooting issues related to generator load capacity and power delivery.

Advanced Troubleshooting

No Power to Devices; Phase Issues

Diagnosing issues with power delivery and voltage inconsistencies.

Engine Leaks and Fuel System Issues

Troubleshooting oil and fuel leaks, and fuel system blockages.

Recoil and Fuel Gauge Problems

Resolving issues with the recoil starter and fuel gauge leaks.

Limited Warranty and Service

Warranty Coverage and Eligibility

Details on products covered, warranty length, and qualifying purchase requirements.

Service Procedures and Exclusions

How to obtain service, common exclusions, and emission control warranty.

DEK 6500 Specifications

General IconGeneral
BrandDEK
Model6500
CategoryPortable Generator
LanguageEnglish

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