DuroStar Oil Burning / Incomplete Combustion

White or blue smoke from exhaust during startup and operation.

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.

Possible Causes

Overfilled crankcase, Worn valve stem seals, Worn piston rings, Restricted air filter

Safety first: Operate the generator in a well‑ventilated outdoor area. Avoid inhaling exhaust fumes.

Check oil level: Ensure oil is not above the FULL mark. If overfilled, drain to the correct level.
Inspect air filter: Replace a clogged or oil‑soaked air filter.
Monitor consumption: Track oil usage over several hours of operation. Excessive consumption suggests internal wear.
Service engine if needed: Persistent smoke with normal oil level typically requires professional engine repair (valve seals or ring job).

Hard 4/5

Air Filter Element

Check Price on Amazon

We may earn a commission from links on this page.