speedometer calibration
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=39448
Printed Date: November-16-2024 at 1:38pm
Topic: speedometer calibration
Posted By: BaccoBouncer
Subject: speedometer calibration
Date Posted: July-24-2016 at 11:39am
First I did a search on this and couldn't find an answer.
I am aware that there is a calibration knob on the speedometers
My two speedometers will not track at the same rate. If I calibrate them at let's say 5mph they are off at 20mph. I looked up how they work, water pressure to air pressure. So I imagine this means I have an air leak? Where is the best place to start trying to find the leak?
Or am I assuming incorrectly and this is not likely the root cause and it is something in the gauge or maybe the pressure pickup at the back of the boat like some material got in their or their is a filter I can clean?
In summary what is the best sequence for diagnosing?
Thanks,
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'97 21' Sport Nautique
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Replies:
Posted By: DrCC
Date Posted: July-24-2016 at 12:44pm
I would first disconnect the lines at the back of the speedmeters, then blow-out.
Hopefully it's just a build-up of junk in the lines.
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Posted By: Jonny Quest
Date Posted: July-24-2016 at 2:53pm
-1 on what DrCC said.
Make sure that you blow from the speedometer to the pitot and not the other way around.
Several years ago, I used a hand-held GPS unit to verify and calibrate my 2 AirGuide speedometers. Then I set both to read the same at 34 mph (my ski speed). Then I checked to see which of the 2 speedos was the most accurate at 20 mph (our wakeboard speed). Once I did that, I used the designated wakeboard speedo for boarding. I ran with that set up for several years.
Recently, I replaced one of the AirGuide speedos with the Perfect Pass Precision Star GPS speedometer. Love it.
JQ
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Current
2003 Ski Nautique 206 Limited
Previous
2001 Ski Nautique Open Bow
1994 Ski Nautique Open Bow
Aqua skiing, ergo sum
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