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Gaffrig Speedo calibrate

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Old 05-13-2007, 10:02 PM
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Default Gaffrig Speedo calibrate

How can I calibrate the speedometer ? I did some comparing speeds with a hand held GPS and the pitot/speedo is 10 to 15 mph slower than GPS . Or should I just toss the stock unit for a new GPS Speedo .
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Old 05-13-2007, 10:04 PM
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I have the same problem Good question
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Old 05-13-2007, 10:54 PM
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mine reads slow also, i tried drilling[enlarging] the brass adapter that screws to the pitot tube but all it did was make my needle bounce, i have another adapter to put back into it, looks like its time to go into the gauge itself
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Old 05-14-2007, 05:36 AM
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Send it to Gaffirg.. If its that far off something is seriously wrong... My Gaffrig (Livorsi) is within 1 - 2 MPH at its worst.. I am using the transom mount P/U though... And, I am "assuming" You have already checked the lines to the back and the water pickup..??
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