Honda Engine Oil Burning

Generator emits blue or bluish-gray smoke from exhaust

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 engine oil, Worn piston rings or valve seals, Clogged crankcase breather, Prolonged operation at light load causing wet stacking (diesel)

Safety first: Operate only outdoors. Shut down and cool before checking oil.

Check oil level: Verify oil is not above the maximum mark on the dipstick. Drain excess oil if overfilled.
Inspect breather: Check the crankcase breather hose and separator for blockage. Clean or replace as needed.
Run under load: For diesel units, operate at 50–75% load for an hour to burn off deposits if the unit has been lightly loaded.
Engine wear: Persistent blue smoke with correct oil level indicates internal wear; schedule engine service.

Hard 4/5

Crankcase Breather Assembly

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