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Adding a flush port to an older outboard

Old 10-08-2020, 09:42 PM
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Default Adding a flush port to an older outboard

My older Yamaha excel outboard lives in saltwater from may through October. Without a flush port it only gets a freshwater flush once a year when itís winterized. Is there anyway to add a flush port to an older outboard that wasnít built with one? Any other ideas to keep the salt from building up throughout the season?
Old 10-09-2020, 05:31 AM
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Sounds crazy but get a good pair of flush muffs and bungie cord them to the lower unit. Trim down into the salt water and turn the hose on.

Taste the engine pisser water. It should be fresh.
Old 10-09-2020, 05:33 AM
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Originally Posted by captbone View Post
Sounds crazy but get a good pair of flush muffs and bungie cord them to the lower unit. Trim down into the salt water and turn the hose on.

Taste the engine pisser water. It should be fresh.
interesting but worth a shot I guess. Anyone else tried this?
Old 10-09-2020, 07:00 AM
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Yep, I've done it.
Old 10-09-2020, 07:30 AM
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I just give it a freshwater flush when it gets winterized. Then it gets a good cleaning every other decade with salt-away.

I used to flush outboards after every use, back when Reagan was president. Haven't done it since. I've only had my current outboard for 12 years, so I'll revisit this thread in another decade or so if I can remember.
Old 10-09-2020, 07:40 AM
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Originally Posted by captbone View Post
Sounds crazy but get a good pair of flush muffs and bungie cord them to the lower unit. Trim down into the salt water and turn the hose on.

Taste the engine pisser water. It should be fresh.
I've done this before. It's not ideal and doesn't compare to doing so on the hard but it's better than letting all that salt build up. Having said that, I would recommend
pulling it, now and then, and flushing with a "salt away" type product.
Old 10-09-2020, 07:44 AM
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Originally Posted by eman6501 View Post
I've done this before. It's not ideal and doesn't compare to doing so on the hard but it's better than letting all that salt build up. Having said that, I would recommend
pulling it, now and then, and flushing with a "salt away" type product.
yea Iím trying to imagine leaning over from the dock trying to wrestle a set of muffs onto the lower unit. It ends with me getting wet
Old 10-09-2020, 07:45 AM
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Originally Posted by jobowker View Post
I just give it a freshwater flush when it gets winterized. Then it gets a good cleaning every other decade with salt-away.
Same here. Also a May-Oct season for the most part. I flushed the whole system for the first time this Spring with marine de-scaler and a pump in the driveway, and it really wasn't that cruddy. Motor does not overheat. New impeller kit this year as well.

Old 10-09-2020, 07:46 AM
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Originally Posted by SweetD View Post
Same here. Also a May-Oct season for the most part. I flushed the whole system for the first time this Spring with marine de-scaler and a pump in the driveway, and it really wasn't that cruddy. Motor does not overheat. New impeller kit this year as well.
yea I have no overheating either. Runs like new. I just see all the crud around the head and water jacket gaskets and wonder whatís inside.
Old 10-09-2020, 08:01 AM
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Originally Posted by Tinkertoy250 View Post
yea Iím trying to imagine leaning over from the dock trying to wrestle a set of muffs onto the lower unit. It ends with me getting wet
It requires quite a bit of finagling the dock lines, pulling the boat perpendicular etc etc. Much easier on a lift, but even that has challenges. There has to be a way to plumb a flush port because since Iíve got the Yamaha I wonít be without one again thatís for sure.
Old 10-09-2020, 08:35 AM
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Originally Posted by Tinkertoy250 View Post
yea I have no overheating either. Runs like new. I just see all the crud around the head and water jacket gaskets and wonder whatís inside.
Absolutely. I'd go for the system flush. Lots of info on methods if you haven't seen it already on here, one thread example:

How to: Cleaning your cooling system with vinegar

Quick video of my setup:


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