Outboard Manual Includes Flushing Instructions

The flushing port is standard equipment on most new Outboard engines. But most of us don’t really understand the distinction between the flushing ports of the different Outboard engines. I will provide you with 3 engine examples in this article.

The Honda Outboard manual states: “Thoroughly clean and flush the outboard  motor with fresh water after operation in dirty water or salt water.” Honda suggests making use of the flush port connector on the side of the engine for flushing and the emergency-stop switch clip be removed so there is no chance of the engine starting while you’re near the propeller.

The Honda flushing instructions are simple. You first disconnect the port connector, then connect the garden hose to the flush port connector, turn the water on and let it flow through the engine for 10 minutes at the least. As soon as you flushed the engine, disconnect the garden hose and attach the port connector.

If you have a Suzuki Outboard, there are a couple of ways to flush your engine. First, procure an ear-muff style flusher and second, use the flush-plug adaptor on the tail of the engine cowling. With the ear-muff style flusher, Suzuki advises turning the garden hose on to get enough water to flow so that plenty of extra water flows out from around the rubber cups. It’s best to remove the propeller before starting the engine at idle speed for a few minutes and then turn the engine off and remove the hose and flusher.

With the flush-plug adaptor, simply remove it and install the garden hose into that port and turn on the water. You don’t have to start the engine but simply let the water flow for at least five minutes. Disconnect the hose and reinstall the plug once you’re done. It’s simpler and safer than making use of the first method.

The flushing instruction of Yamaha Outboard says: “Perform this procedure right after operation for the most thorough flushing.” and “after shutting off the engine, unscrew the garden hose connector from the fitting on the bottom cowling.” Connect the garden hose, turn the water on, and let it flow for 15 minutes. The Yamaha Outboard manual gives a warning: “CAUTION: Do not perform this procedure while the engine is running. The water pump may be damaged and severe damage from overheating can result.”

To thoroughly understand your Outboard engine including its flushing instructions, take time to read your owner’s manual if you still have it. If you don’t, then you could always find a substitute on the Internet or with your local dealer. You’ll be surprised of the many things you haven’t known about your favorite Outboard machine.