Mercury has made flushing your engine confusing as hell in their manuals. It says to run engine when using the flush port, to not run engine when using the flush port, and they make no mention of the differences between flushing with the muffs vs the flush port. Good video!
Yup, Mine just talks about hooking up the hose to the flush port, noting about hot or cold. Fortunately I've always been doing it when my engine is hot (relatively) within minutes of putting it on the trailer.
Just like everybody else I’m a little confused on where does the water come out of the top flushing and is it necessary to do both and also how long do you flush it
Question,/problem. I just bought a brand new Mercury 115 XS Pro. I flushed my engine using the hose that comes out of the side of the engine. You unscrew the cap, then unscrew the cap from the hose, and then screw it into the garden hose for fresh water flush. Easy.... My problem is that when I was done, I didn't screw the small hose in the engine to the cap before screwing the cap back in. Now when I unscrew the cap, the hose is stuck in the housing and I cant get it to pull through... Any sugggestion on how to fix this?
have a question you may know. I washed my mercury 40 HP. As I sprayed the fresh water on the back of the outboard and the water go into the exhausted on the back. Will this fresh water damage the engine?
Why use the muffs if you have the port? Dealer anx manual told me engine off, not idle, simple hose. Are they wrong? Does any part not get flushed like impeller? Or does fresh circulate the whole way from a hose /engine off?
Had a question, I just changed out my impeller and on the side anodes I have water coming out of that area when i put on the muffs and run water. Noticed on your video it does that also. Is that correct? I have never really paid attention to where water came out when running the muffs. Thanks
When the engine is cold the thermostat would be closed preventing the flush water from washing out all the water passages. The thermostat only opens when the engines reaches normal temperature - this will only happen if the engine is running.
So you can use the flush port when e fine is cold but the key is to remove your thermostats so that you can get a flush all the way through the system.
