Is it 4 stroke or 2 stroke
Does it have a dipstick that indicates the amount of oil?
If it has, it is a 4 stroke and does not require an oil/fuel mix.
If it does not have a dipstick, it is a 2 stroke and will require a mix of oil and fuel.
Without knowing anything about your genset, I would think that it is a 4 stroke.
A 2 stroke motor would deliver the power too high in the rev range.
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