Will a power washer remove mortar stain off brick?

Yes, a power washer can effectively remove mortar stains from brick surfaces, especially when paired with a suitable cleaning solution. However, it's important to use the right pressure setting to avoid damaging the brick or mortar joints. Start with a lower pressure and gradually increase if necessary, and always test a small, inconspicuous area first. Additionally, using a fan tip nozzle can help distribute the water more evenly and reduce the risk of harm.