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  #1  
Old 05-28-2011
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AC Through hull

I'm close to completion of a 2 year effort to bring this '86 37 back to life. My next project is installing a through hull for a future AC. But IMHO, there are enough through hulls already. Has anyone considered sacrificing the speed sensor through hull and using it for AC raw water intake? It's located in the right place. The chart plotter and even my iPhone for that matter will give me my speed. I'm probably overlooking something obvious?
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Old 05-28-2011
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The overlooked obvious:
The impeller wheel gives you speed through the water.

The GPS based speeds are speed over ground.


Not the same thing at all.
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Old 05-28-2011
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Quote:
Originally Posted by jlb40514 View Post
I'm close to completion of a 2 year effort to bring this '86 37 back to life. My next project is installing a through hull for a future AC. But IMHO, there are enough through hulls already. Has anyone considered sacrificing the speed sensor through hull and using it for AC raw water intake? It's located in the right place. The chart plotter and even my iPhone for that matter will give me my speed. I'm probably overlooking something obvious?
...yeah, you want both Speed Thru Water and Speed Over Ground... but along your lines of thinking, if you have separate transducers for Speed, Temp, Depth, you could upgrade to a combined unit like Airmar's DST800 and free up a thru hull for your AC thru hull...
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Old 06-02-2011
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Thanks for the info! I have to replace the speed sensor anyway. This will save me a lot of time and effort!
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