Power Steering Fluid

2halloween · Post by **2halloween** » Thu Nov 14, 2019 9:55 am

I have a sea star hydraulic steering system on my 2018 25SC. I have been checking my manuals (I just bought this boat used) and cannot find where I would fill the power steering fluid. Any ideas?

akorcovelos · Post by **akorcovelos** » Thu Nov 14, 2019 10:37 am

Usually filled at the helm. He uses a SeaStar system in the video.

2halloween · Post by **2halloween** » Sat Nov 16, 2019 4:52 pm

Much appreciated

AsLan7 · Post by **AsLan7** » Sat Nov 16, 2019 8:44 pm

2halloween wrote: Sat Nov 16, 2019 4:52 pm Much appreciated

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Hey 2H. Welcome to the Cobalt chat forum. So glad you found us!

Any pics of your water ride?

Again welcome aboard mate!

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wrobeljd · Post by **wrobeljd** » Sun May 10, 2020 11:14 am

i have a 2018 @%SC as well with a 300 Verado and the video posted doesn't address how to top off...any ideas? i looked everywhere on the boat and cannot find a check point

AsLan7 · Post by **AsLan7** » Sun May 10, 2020 3:08 pm

wrobeljd wrote: Sun May 10, 2020 11:14 am i have a 2018 @%SC as well with a 300 Verado and the video posted doesn't address how to top off...any ideas? i looked everywhere on the boat and cannot find a check point

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Hey wrobeljd.

Any pics of your ride? Hopefully you can stay awhile.

Welcome aboard mate!

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AlexV · Post by **AlexV** » Sun May 10, 2020 3:35 pm

I have a 25 SC. I'm sure I saw the fill on the Steering column. I thought I saw it when was cleaning and looked up behind the panel. You want to fill at the highest point in the system to get the air out.

Big Block Power · Post by **Big Block Power** » Sun May 10, 2020 3:48 pm

Kind of odd to us I/O guys. But it's like this.

https://www.boatingmag.com/how-to/how-t ... -steering/

wrobeljd · Post by **wrobeljd** » Sun May 10, 2020 4:01 pm

00756C66-1EFA-49C6-9953-599D2342A527.jpeg

Here is a picture; no place to add any fluid

Big Block Power · Post by **Big Block Power** » Sun May 10, 2020 4:33 pm

Like Alex said it must be on the back side of that. Like he says they put it at the highest point for getting air out.

hafalel · Post by **hafalel** » Tue Jun 30, 2020 4:17 pm

Late to the game here but any luck? I have a soft hissing sound when turning at very low speeds and wondering if its the fluid ?

bwh · Post by **bwh** » Mon Jul 07, 2025 4:36 pm

I have a 2019 25 SC I purchased last July from a private seller. There is a hissing sound when turning the wheel regardless of speed. Marine mechanics have looked at it twice, bled the system and even changed a hose that was on the PS pump that they reported had the wrong fitting per a service bulletin. Is this normal?? Anyone else experienced this and is there a fix?

bwh · Post by **bwh** » Mon Jul 07, 2025 4:39 pm

Regarding my previous (power steering) post with the hissing when turning the wheel at any speed- Engine is a 300 Mercury Verado

AsLan7 · Post by **AsLan7** » Mon Jul 07, 2025 9:19 pm

bwh wrote: Mon Jul 07, 2025 4:39 pm Regarding my previous (power steering) post with the hissing when turning the wheel at any speed- Engine is a 300 Mercury Verado

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So glad you found us, bwh. A slight hissing sound is normal for these outboards. If it’s excessive then there may be air trapped in the system. You mentioned it was bled so I’m guessing the hissing you’re hearing is normal.

Any pics? And welcome aboard mate.

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