MPH

The mph on boat wont work proper anything I can do to it. Dont really need to buy a new one I'll get there when I get there but just is annoying when something is not working like it should. Thanks

clean out the debri in the pitot tube/line

^^I agreee. Check for any kinks or cuts in the tubing and make sure everything is tight. You can disconnect it at speedometer if you can get to it and blow air back through it. Don't use a lot of pressure or you could blow something apart.

I agree with both of the gentlemen that have already posted. Remove the rubber line from the pitot and from the back of the gauge itself. Then blow air through it if you have a compressor and an air gun. If not, take it to the nearest gas station and do it. The rubber line should be connnected with zip-ties. If not, be careful when removing them -- you could break the nipple off the pitot or even worse, off the gauge.

I've done this a million times, mostly at the boat dealership I used to work at.:cool:

What kind of motor do you have? What year and what make? The speedo pickup could be located on the lower unit. If it is, remove the rubber line from the gauge and try to blow it out. If this doesn't work, remove the line from the top front of the cavitation plate on the lower unit and try (again with the line off the gauge).:D

Hope this helps you out.

Its a pt 185 with a 90 merc I have never worked on boats before so these terms and locations I dont know where every thing is at.

On the front of the lower unit mine has a small hole that feeds water to the tube. Before GPS I would always have to take a small drill bit and "with my fingers", drill the wood out of the hole. It would get jammed full of debris every trip out. Mine has been blocked for years now, GPS I don't care now. Hope this helps...

Thanks guys I'll take a look at it.

Speedo hole is clogged. Clean it out with a 5/32 drill bit, just do it with your fingers back and forth until cleared.

[QUOTE=slimshad09;371322]On the front of the lower unit mine has a small hole that feeds water to the tube. Before GPS I would always have to take a small drill bit and "with my fingers", drill the wood out of the hole. It would get jammed full of debris every trip out. Mine has been blocked for years now, GPS I don't care now. Hope this helps...[/QUOTE]

mine is the same i had to take a drill bit to it, but like you said with gps i dont care anymore.