The answer to 'why is my pressure washer discolored' is that discoloration is often caused by mineral buildup or rust in the pressure washer. This can happen over time as water, detergents, and other cleaning solutions pass through the machine. The discoloration may appear as a yellowish, reddish, or brownish tint on the plastic or metal components.
Some common causes of pressure washer discoloration include hard water deposits, corrosion from acidic cleaners, and age-related wear and tear. In many cases, the discoloration is harmless and doesn't impact the performance of the machine, but it can make the pressure washer look unsightly.