Quote:
Originally Posted by SSD
I have a Garmin chart plotter and a airmar 20-633-01 try multi sensor. The depth appears to be working but the temperature reads 130 degrees. The paddle wheel is clean and rotates fine but no speed is displayed. Looking to see how to test? |
I've been fighting with a similar issue on my Airmar 810. Depth and temperature are fine but
boat speed remains at 0. If yours doesn't even show 0 as
boat speed (e.g., it shows a dashed line or it's blank), it might be a configuration issue in your chart plotter (e.g., make sure the chart plotter is using the proper device to measure boat speed). If it shows 0, you should be able to remove it, blow on the paddle wheel, and see if it turns and shows speed. (I was advised if you can't turn it by simply blowing on it, it likely needs to be cleaned; spinning with your finger isn't a good enough test.) Other potential issues could be it's not pressed down completely in the thru-hull, it's not facing the correct direction (the arrow on top should face forward toward the bow), or there's something on the bottom of your
hull blocking flow (i.e., it needs to be scraped).
In my case (and I'm on my second one as the first one was replaced under warranty because
Navico thought no boat speed meant it was just a defective transducer), I'm told the only other possibility is the thru-hull fitting is somehow bad. But the only way to check that is through a haul-out.
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