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Old 08-24-2021, 11:22 PM   #1
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Default Outdrive help

Does anybody know what this small hose goes to from the transom to the outdrive? It was disconnected when I got back to my house. Goes into a zerk fitting on the outdrive.
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Old 08-25-2021, 01:21 AM   #2
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That’s the speedometer air tube. There is a small hole in the leading edge of the drive that takes in water when underway which compresses the air in this hose which then cause the speedometer needle to move.
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Old 08-25-2021, 01:26 AM   #3
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That would make so much sense considering that my Speedo would intermittently not work. Thank you so much!
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Old 08-25-2021, 01:26 AM   #4
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Quote:
Originally Posted by Bigolbill View Post
That would make so much sense considering that my Speedo would intermittently not work. Thank you so much!
You’re welcome.
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Old 08-25-2021, 12:48 PM   #5
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That is a pitot system and measures pressure from a port on the leading edge of the outdrive. Look down the outdrive and you will see a small notch. Clean that out with a paper clip.
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