You would still select the 4-Outlet Flushmaster and using the instructions, set the unneeded outlet to 0 minutes. This will remove the outlet from the flushing cycle.

You still need to select your length of hose needed for your setup.

And (3) of the Flush Port Quick Connects for your outboard brand. Plus any accessories that make your setup more convenient for you.

Use a dock line or rope to measure the distance from where you will place your Flushmaster device to your furthest away flush port connection.

Flushmaster runs on (3) AA batteries. Come included.

No! Flushmaster follows all manufacturer recommendations on flushing. 15 minutes each, individually. Flushmaster comes preprogrammed for 15 minutes each outlet.

Press Start, and Flushmaster cycles through each outlet one at a time for the set duration. After the cycle is complete it will shut off blocking the flow of water.