Yamaha Oil Burning / Worn Engine Components

Generator emits blue smoke from the exhaust and consumes engine oil.

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

Worn piston rings, Valve stem seal leakage, Overfilled crankcase oil, Clogged crankcase breather

Safety first: Turn OFF the generator and allow it to cool before checking oil.

Check oil level: Ensure oil is at the correct level on the dipstick. Drain excess oil if overfilled.
Inspect breather: Locate and clean or replace the crankcase breather element to prevent excessive crankcase pressure.
Monitor consumption: Track oil usage over several run hours. High consumption with blue smoke indicates internal wear requiring engine overhaul by a Yamaha technician.

Professional Required 5/5

Crankcase Breather Assembly

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