DEK 3850 User Manual (English)

Questions and Answers:

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Terri TateSep 6, 2025
What to do if my DEK 3850 Portable Generator engine starts, but then shuts off quickly?
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  mary20Sep 6, 2025
  If your generator starts but shuts off within 10 seconds, consider these potential causes: * The spark arrestor may be dirty. Remove, clean, and replace it. * The oil level may be too low. The engine is designed to shut down when oil levels are insufficient. Check your owner's manual for the correct oil capacity. * The fuel valve may be off, or the generator may be out of fuel. Fill the tank and turn the fuel valve on. * The spark plug may be fouled or defective. Remove, clean, or replace the spark plug. * The vacuum check valve may have failed. Replace the check valve.
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Mrs. Alexis TaylorAug 25, 2025
What to do if my DEK Inverter shows voltage but no outlet power?
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  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.
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Jennifer AcostaAug 25, 2025
Why does my DEK Inverter engine bog down under load?
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  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.
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David LeeAug 27, 2025
DEK Inverter shows voltage but no power to devices, what's wrong?
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  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.
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Sydney BurtonAug 27, 2025
What to do if DEK Inverter starts then shuts off quickly?
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  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.
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Kent StrongSep 14, 2025
Why is the recoil on my DEK Portable Generator hard to pull?
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  Toni FlynnSep 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.
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Mallory MurphySep 12, 2025
Why is my DEK Portable Generator voltage too high or low?
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  Melissa SloanSep 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.
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Kevin RobersonSep 13, 2025
How to fix a fuel leak at the tank shut-off on my DEK 3850?
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  Lindsay WolfeSep 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.
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gardnerbrandonSep 4, 2025
How to fix a leaking fuel gauge on a DEK Inverter?
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  bryan39Sep 4, 2025
  To address a fuel gauge leak in your DEK Inverter, replace the fuel gauge gasket.
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jensenerinSep 2, 2025
Why is oil leaking from the valve head cover on my DEK Inverter?
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  Kelli LewisSep 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.