Moeller 099085-00 Pro Inboard Motor Flusher Flushing your motor is an important part of boat maintenance. It helps clear out contaminants, deposits, and other materials in your engine. Marine motor flushers are an easy way to help flush out and prevent damage and costly repairs. The Moeller Inboard Marine Motor Flusher is designed for inboards or boats with a thru-hull water intake. When using a marine motor flusher, it is critical to run the motor long enough to open the thermostat. This allows