Any ideas what this bit is

[Ruari 29]

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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[Jizm]

The black plastic one at the front?

[Boats&Outboards]

It's the speedo pipe, works on a vacuum pressure system. Connects to the gauge if you have you.

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

[Jizm]

Originally Posted by Boats&Outboards

It's the speedo pipe, works on a vacuum pressure system. Connects to the gauge if you have you.

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

I thought that but on the previous mercs I've have the pipe runs inside the steering tube....

[Ruari 29]

Ah, dont have a speedo. Should water come out where the pipe meets the block?

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[Boats&Outboards]

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

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007

[Jizm]

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

[Ruari 29]

Tube water no 12

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[Jizm]

Originally Posted by Ruari 29

Tube water no 12

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Yep so not sure it's the pitot tube.

[uncle al]

it is a speedo tube for an anologue speedo (i used to joke that they are accurate to the nearest 100mph)

[Jizm]

Originally Posted by uncle al

it is a speedo tube for an anologue speedo (i used to joke that they are accurate to the nearest 100mph)

Would water come out it when running on flush muffs then al?

[uncle al]

yes water could come out as the connection is in either the g/housing or the btm of the leg depending what obm, i also notice that the speedo pipe connection is missing that is why you can see water

[Ruari 29]

So its normal then? It was a dribble from the base of the pipe just worried me.
Thanks all for the help and advice.

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[Boats&Outboards]

Yes just block it off, connect it up or leave it, dependant of how much it bothers you

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007