My nitro 2009 Z7 with a 150 merc. the speed odometer

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Donald Prater

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I know that I can use air to blow out the line but I cannot find the line under the dash to blow out the dirt or ?. Where does the line from under to dash connect to the boat or motor 2009 Z7 150 Merc.?
 
I would start with the pitot tube on the leading edge of your Mercury's lower unit. I use s small drill bit, 1/16 inch, by hand, do not put it in a drill. You can wrap the butt end with a little electrical or duct tap to make it easier to twist. Or you can use a bit that is made to chuck into an electric screwdriver. They have a nice little insert to hold. Twist it into the the hole, pulling it out often to clean it.
 

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