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  #1  
Old 03-18-2017, 01:10 PM
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acam37 acam37 is offline
 
Join Date: Aug 2012
Location: Lufkin Tx
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Default Bought a used Horizon tach

My old mechanical tachometer was going bad (showing 200rpm drop) so I decided to go digital. I found a used Horizon P-1000 and installed it. Now Im really confused. It shows I'm turning 1700rpm at full ground static while my hand held tach is showing 2650 (hartzell CS). It came out of a Bonanza with a 6 cylinder. So my question is, are these tachs programmed for specific number of cylinders or is there something I need to do to get this thing to read correctly? Sun-N-Fun is a few weeks away so I need to get this resolved. It is wired exactly as the manual states and all the other functions work as advertised.
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  #2  
Old 03-18-2017, 01:18 PM
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walldan walldan is offline
 
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Default

http://www.cfcmss.org/DesktopModules...ad.aspx?ID=153

Maybe try the reset instructions on page 12 and let it retrain itself... Is the tach accurate at idle?
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Last edited by walldan : 03-18-2017 at 01:25 PM.
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  #3  
Old 03-18-2017, 01:31 PM
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acam37 acam37 is offline
 
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Default

I think it is. I have not reset it. Will try that and also isolate the mags and see if that makes a difference.
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  #4  
Old 03-18-2017, 04:44 PM
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acam37 acam37 is offline
 
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Default Update:

I reset the tach, isolated the mags, used an optical handheld tach to compare rpm's and it is exactly 800rpm off. I guess I need to call Horizon and see if it needs to be calibrated for a 0360?
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