The answer to 'pressure washer smells bad' is that a bad odor coming from your pressure washer is often caused by a buildup of dirt, debris, or mold inside the machine. This can happen over time as the pressure washer is used and not properly cleaned and maintained.
Some common symptoms of a smelly pressure washer include a musty, rotten, or chemical-like odor coming from the machine. This can indicate that the internal components need to be cleaned or the machine may need to be serviced. In some cases, the smell could also be a sign of a more serious issue, like a gas leak or engine problem.