The answer to 'why is my pressure washer greasy' is that a greasy pressure washer is often caused by an oil leak or excessive oil use. This can happen if the pressure washer's engine oil level is too high, the oil seals are worn, or the oil pump is malfunctioning. A greasy pressure washer can also be caused by using the wrong type of engine oil or by overfilling the oil reservoir.
If your pressure washer is greasy, you'll likely notice oil dripping from the machine or a buildup of oil around the engine. This can be messy and can also lead to decreased performance and potential engine damage if left unchecked. To fix the issue, you'll need to inspect the pressure washer, check the oil level and quality, and potentially replace worn seals or other components.