DuroMax
Oil Burning / Excessive Exhaust Smoke
Visible blue or white smoke from exhaust during operation
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Overfilled crankcase, Worn piston rings, Valve stem seal leakage, Clogged crankcase breather
How to Fix / Troubleshooting
Safety first: Operate the generator in a well‑ventilated outdoor area only. Shut down and disconnect battery negative before checking oil.
- Check oil level: Ensure oil is not above the FULL mark. Drain excess oil if overfilled.
- Inspect breather: Locate the crankcase breather or PCV system and ensure it is not blocked. Clean or replace as needed.
- Monitor consumption: Note how much oil is used over several hours. Heavy consumption with smoke suggests internal wear.
- Engine overhaul: Worn rings or valve seals require engine disassembly and repair by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Crankcase Breather
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