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post #1 of 6 Old 08-17-2012 Thread Starter
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Knot Meter

My knot meter just flashes 888 when I turn on my instruments. It's done this since I bought the boat last year.

The previous owner said it worked for him when he launched and thought the paddle wheel was likely just gunked up. I cleaned it when I pulled the boat this winter but it never worked.

So, here's my question...

How can I tell if the guage is broken, or if it's a problem with the paddle wheel / hardware (if there is any outside of the gauge)?
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post #2 of 6 Old 08-17-2012
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Get in touch with whoever made the thing, or try to find resources online - you're looking for the "error codes" for you device. What it's flashing on the screen- and even possibly the pattern of the flashing- is likely diagnostic. The device is trying to tell you what's wrong; you just need to learn its language.

Obviously you could check the wire leading into the display - is there a plug? Water/corrosion damage?
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post #3 of 6 Old 08-17-2012
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Re: Knot Meter

FWIW, with me if the paddlewheel is gunked up, it normally registers 0. Even while underway, the wheel does not turn, so the speed is zero. Likewise, if a wheel is broken, you get zero or erratic numbers.

A pure guess - 888 flashin often means the instrument is not connecting to the sensor...

I would do the basics:
1) Look for an owners manual (Google is your friend)
2) Trace the wiring and visually inspect to ensure it is sound and corrosion free
3) pull the paddlewheel (sensor), clean and replace - making sure you are ready to plug the hole when you remove it! Incidentally, you should be able to spin the wheel manually and see numbers on the instrument...

If none of the above work, more detailed testing will be needed.
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post #4 of 6 Old 08-17-2012
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Re: Knot Meter

make and model?

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post #5 of 6 Old 08-17-2012 Thread Starter
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Re: Knot Meter

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Originally Posted by overbored View Post
make and model?
Would have to double check, but I believe it is a Standard.
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post #6 of 6 Old 08-18-2012
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Re: Knot Meter

I second the paddle wheel. Just worked on a 145 Westport yacht in Atlantic City. They couldnt understand why they were only indicating 8 knots. It had 2 years of barnacles built up over it.


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