Videos How to Clean Water Spots Off an Engine Cowling. July 11, 2019July 13, 2019 The Next Bite Boat Maintenance, Gary Parsons, Mercury Gary Parsons shows a quick, easy, and inexpensive way to remove the water spots from your engine cowling. Other Related Posts: Mercury Engine Maitnence Gary Parsons Small Mouth Equipment Korey Sprengel Quick Gluing PowerBait and Gulp! Tip Use Schaeffers Oil Citrol to Clean Your Boat