The recommended flushing time for both is 10 minutes.įor direct-injected two-stroke OptiMax outboards, Mercury recommends using a water supply with no more than 45 psi (pounds per square inch) and attaching it to the flush port on the back of the engine, beneath the cowling. After removing the prop, attach a garden hose and then start the engine. It recommends using the optional flush port on the lower unit. The procedure for the Honda BF25 through BF50, however, is completely different. It includes the cautionary notice that running the engine while flushing with a garden hose connected to the port could damage the engine. In the case of the 2005 Honda BF225 motors I flushed, the manual says to connect a garden hose to the flush port, which is on the upper starboard side of all Honda models more than 50 hp. To do it right for your particular model, look it up in the owner’s manual. I could see by her smile that she couldn’t wait to spring this bit of trivia on him the next time they went out.įlushing an outboard engine is not a one-procedure-fits-all thing.
always does.” I told her the owner’s manual says to flush them with the engine off. “Aren’t you going to start the motor?” Kat said. When we were done with her first lesson, I hooked up the garden hose to the flushing port, turned on the water and sat down to wait. So before embarking on our first run, I went to the Honda website () and looked up her motors’ owner’s manual. Johns River in Jacksonville, Fla., was flush them. It’s powered by twin Honda 225 outboards, and I knew the last thing we would do after a run in the brackish St. Her son, J.K., had always done the chauffeuring, but she wanted to take it out herself and learn how to care for the boat when we were done with the trip. If you haven’t read your engine’s owner’s manual, there’s a good chance you have been flushing your engine wrong.Ī few months ago, my neighbor Kat asked if I could help her learn to drive her 31-foot Pro-Line.
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