Manufacturing, Manufacturing Plant Fond du Lac, WI – Sprinklers keep fire from spreading at Mercury Marine April 30, 2016 viking210 The sprinkler system installed at Mercury Marine stopped a fire from spreading Wednesday night. At 11:23 p.m., Fond du Lac Fire and Rescue responded to a report of a fire in the dust collector at Mercury Marine Plant 98. Upon arrival, crews found the sprinkler system activated, limiting the spread of the fire. Some smoke was in the building. The crews entered the building and contained the fire to the dust collection system. Access to the dust collector was difficult, so putting out the fire was time-consuming, firefighters say. No injuries were reported.