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70 HP Merc water coming out of hose

biffidum

Contributing Member
I changed the water pump on th

I changed the water pump on this motor which is new to me and all went well (more or less). There was a hose coming out of the front of the lower end that snakes its way up the mid section and out the front by the motor mount. The hose was pinched off when I removed the lower unit.

I freed up the hose and water comes out of it when the boat is running in the lake. What's the purpose of this hose?
 
My speedo has a pitot tube thi

My speedo has a pitot tube thingy on the transom. Perhaps I should just leave it plugged.
 
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