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Old 06 November 2011, 09:50   #1
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Any ideas what this bit is

I have a mercury 50hp 4 stroke and when running on the hose/muffs today I noticed water coming out of the bottom of this small pipe? Any ideas?
Engine runs fine no problems.

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Old 06 November 2011, 09:59   #2
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The black plastic one at the front?
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Old 06 November 2011, 10:00   #3
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It's the speedo pipe, works on a vacuum pressure system. Connects to the gauge if you have you.

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Old 06 November 2011, 10:03   #4
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Quote:
Originally Posted by Boats&Outboards View Post
It's the speedo pipe, works on a vacuum pressure system. Connects to the gauge if you have you.

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I thought that but on the previous mercs I've have the pipe runs inside the steering tube....
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Old 06 November 2011, 10:05   #5
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Ah, dont have a speedo. Should water come out where the pipe meets the block?

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Old 06 November 2011, 10:06   #6
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They do on some, looks like its supposed to go through that lower cowling from the hole at the top of it but it's hard to see on the picture, makes no difference other than cosmetics though

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Old 06 November 2011, 10:06   #7
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Not sure if we are all referring to the same thing...
Have a look here:
Mercury & Mercruiser Parts, Driveshaft Housing, 40/50/60 EFI (4 CYL) 4-STROKE
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Old 06 November 2011, 12:54   #8
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Tube water no 12

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Old 06 November 2011, 13:34   #9
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Tube water no 12

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Yep so not sure it's the pitot tube.
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Old 06 November 2011, 13:38   #10
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it is a speedo tube for an anologue speedo (i used to joke that they are accurate to the nearest 100mph)
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