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Saildrive oil rising

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Konstantin View Drop Down
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Joined: 24 August 2014
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    Posted: 14 June 2017 at 13:40
Hi guys, I've got my saildrive oil rising. About 1 cm in a week's use, mixed sailing (freewheeling prop), motoring, anchored.
I pumped about 100ml of oil out and let it stay for a day in a glass and it looks clean and transparent.

What can be a problem? How do I confirm it is water ingress?

When I check oil level theres a hissing sound (air escaping or coming in?) when I unscrew the filler cap.

Volvo Penta D2-75 + 150S leg, 700hrs, 3 years, Hanse 445
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High Time View Drop Down
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Joined: 04 September 2012
Location: Portsmouth UK
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Post Options Post Options   Thanks (0) Thanks(0)   Quote High Time Quote  Post ReplyReply Direct Link To This Post Posted: 14 June 2017 at 16:38
Usually if water gets into the oil it emulsifies and looks milky but it sounds as though this is not happening with yours? 

What oil are you using? 

Maybe you could try some in a glass. Mix some water with it and see if it goes milky after vigorous shaking.

Another thought - when you extracted a sample was it from the top or the bottom of the oil? I guess any water, if it's not emulsifying, would sink to the bottom.

The hissing could be air escaping. If water is entering it will slightly pressurise the saildrive. 
Roger

High Time (415 #038)
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SamsonII View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SamsonII Quote  Post ReplyReply Direct Link To This Post Posted: 14 June 2017 at 19:59
Hi,

Remember that the filling cap on the drive never should be opened when the oil is warm. I have done that misstake myself. I never open it until the next day. The oil expands and give you a wrong reading.
Stein-Erik Carlsen

Hanse 370e 2006 #41 "Samson II"
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High Time View Drop Down
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Joined: 04 September 2012
Location: Portsmouth UK
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Post Options Post Options   Thanks (0) Thanks(0)   Quote High Time Quote  Post ReplyReply Direct Link To This Post Posted: 15 June 2017 at 17:43
I think it is unlikely that the oil will have expanded sufficiently to raise the level by 1cm!
Roger

High Time (415 #038)
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