Gaffrig Speedo calibrate
05-13-2007, 09:02 PM
#1
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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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Good question
05-13-2007, 09:54 PM
#3
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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
05-14-2007, 04:36 AM
#4
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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..??
You have already checked the lines to the back and the water pickup..??
