Doosan G20 SIIIA - User Manual

Questions and Answers

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travisolsonAug 20, 2025
How to fix a Doosan Portable Generator that does not start?
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  Bethany ParkerAug 20, 2025
  If your Doosan Portable Generator's engine won't start, several factors could be at play. The battery might be discharged, so check and charge it as needed. There could be bad cable connections; inspect and tighten all connections. Another potential cause is a failure in the starter or starter switch, which would require testing and replacement if necessary. Finally, a safety relay failure could be the culprit, in which case you should inspect and replace the safety relay.
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Robert WatsonAug 22, 2025
What to do if my Doosan Portable Generator engine overheat?
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  henrymaryAug 22, 2025
  If your Doosan Portable Generator is overheating, there are several possible causes. First, check the coolant level and refill to the proper level if it's insufficient. Fan belt slippage could also be the problem, so tighten or replace the fan belt. A thermostat malfunction could be the cause, requiring a test and replacement. Also, inspect and replace the radiator filler cap if it's malfunctioning. A fouled cooling system interior may also cause overheating, so flush the cooling system. Finally, a clogged radiator can lead to overheating, so clean or replace the radiator.
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Jeffrey SmithAug 25, 2025
Why does my Doosan Portable Generator have low oil pressure?
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  jay46Aug 25, 2025
  If your Doosan Portable Generator has low oil pressure, it could be due to a lack of oil. Check and refill the oil to the correct level. Alternatively, high oil consumption could be the cause, so investigate the reasons for the oil consumption.
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William HancockAug 26, 2025
What to do if starter turns but engine does not fire in my Doosan Portable Generator?
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  Christopher JonesAug 26, 2025
  If the starter turns but the engine of your Doosan Portable Generator doesn't fire, it could be due to several reasons. Check if there is fuel in the fuel tank, as no fuel injection could be the issue. A clogged fuel filter element could also be the cause, so replace it. Air in the fuel system can prevent the engine from firing, so bleed the fuel system. Lastly, the control rack might be stuck at the no fuel position, requiring investigation and repair.
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cindy27Aug 28, 2025
Why does my Doosan Portable Generator malfunction in high speed range?
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  xcooperAug 28, 2025
  If your Doosan Portable Generator experiences malfunctions at high speeds, several issues might be responsible. Insufficient fuel supply could be the problem; check and resolve any fuel supply issues. Air in the fuel system can also cause this, so bleed the fuel system. A clogged fuel filter element could be restricting fuel flow, so replace it. Piping failures, such as squeezed or restricted pipes, should be inspected and repaired. Uneven fuel injection between cylinders can lead to malfunctions, so adjust the fuel injection settings. Incorrect valve clearance adjustment and deteriorated valve springs can also cause issues, so adjust the valve clearance and replace the valve springs as needed.
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Kristin JonesAug 30, 2025
How to increase the engine output of my Doosan Portable Generator?
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  morrisandreaAug 30, 2025
  If your Doosan Portable Generator has low engine output, several factors could be responsible. The injection pump adjustment may be incorrect, so adjust the injection pump timing. Incorrect injection timing can also cause low output, so adjust the injection timing. If the injection nozzles are malfunctioning, test and replace them. Insufficient fuel supply to the injection pump can limit engine output, so check the fuel supply. A governor malfunction can affect performance, so inspect and repair the governor. Low cylinder compression pressure can also reduce output, so check and rectify compression issues. Finally, insufficient air intake volume can be a factor, so check the air cleaner and clean it if necessary.
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Taylor AllenAug 31, 2025
What to do if fuel is injected but engine does not fire in my Doosan Portable Generator?
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  Tara HopkinsAug 31, 2025
  If fuel is being injected into your Doosan Portable Generator but the engine still doesn't fire, consider these potential issues: Ensure the correct preheating procedure is followed. A faulty air heater may be the culprit, so test and replace it if necessary. Incorrect injection timing can also prevent firing, so adjust the injection timing. Lastly, low cylinder compression pressure can be a factor, so perform a compression test.
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Michael MorganSep 2, 2025
Why is my Doosan Portable Generator engine running unstable?
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  Anthony SanchezSep 2, 2025
  If your Doosan Portable Generator's engine is running unstable, it might be due to several reasons. A crack in the injection pipe could be the cause, so inspect and replace the injection pipe. Injection nozzle failure can also lead to unstable running, so test and replace any faulty nozzles. Uneven compression pressure between cylinders can cause instability, so perform an engine compression test. Finally, an incorrect high idle speed adjustment can affect engine stability, so adjust the high idle speed.
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josephbryantSep 4, 2025
What causes battery over discharge in my Doosan Portable Generator?
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  Susan ZhangSep 4, 2025
  If your Doosan Portable Generator's battery is over discharging, consider these potential issues: 1. Low electrolyte level: Top up electrolyte level. 2. Crack in battery body: Replace the battery. 3. Natural consumption: Regularly check and maintain battery. 4. Charging failure: Inspect and repair charging system. 5. Excessive electrical loads: Reduce electrical load or upgrade battery.
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Gloria WilsonSep 6, 2025
Why is my Doosan Portable Generator engine speed stuck at high idle?
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  John HowardSep 6, 2025
  If your Doosan Portable Generator's engine speed is stuck at high idle, it could be due to engine control restriction or seizure. Investigate the engine control systems to resolve this issue.