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Old 08 June 2019, 10:19   #1
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Tiny Tach Wire

Because I uses 3 different outboards (for different occasions) on my Honwave T38. I was going to fit a tiny tach on my battery box near the chart plotter so that I can read it looking forward.

I intend to cut the wire and put in a small plug so that I can leave one end on each motor and the other attached to the battery box.

So to my question is there anything special about the wire on the tiny tach. Can I just use any piece of wire wrapped around the spark plugs with my plug on the end.

Dennis
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Old 08 June 2019, 11:05   #2
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i'd say there calibrated to that length and size of wire any increase in resistance will cause discrepancies i would think. hope i'm wrong because i would like to fit mine on the dash
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Old 08 June 2019, 11:09   #3
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The only thing special is that's a solid wire that will break sooner or later with motor vibration right where connects to the cable pack. Test a flexible wire with same diam/gauge and check if the meter reads properly.

Test with and without connecting ground cable to powerhead. If works well with no ground at all, hook a connector between new pick up cable and meter for each motor.

Happy Boating
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Old 08 June 2019, 11:10   #4
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I have a new one on the desk waiting for an outboard to go on it. The wire looks entirely ordinary but I'd think Jeff might be right about length. However easy enough to test just by extending the wire and see what happens.
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Old 08 June 2019, 11:19   #5
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Quote:
Originally Posted by Fenlander View Post
I have a new one on the desk waiting for an outboard to go on it. The wire looks entirely ordinary but I'd think Jeff might be right about length. However easy enough to test just by extending the wire and see what happens.
good point that david worth a go for sure, i think it will work but might be out by a few revs but that might not matter if you have your propping sorted and just want a display thats near enough
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Old 08 June 2019, 11:43   #6
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bottom line.
on another forum lengthening the red wire causes problems



https://www.tinytach.com/faq
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Old 08 June 2019, 11:50   #7
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I also have a new one and at £6 I am going to give it a go. Even if it is a bit out I think relative revs will be interesting. Also sometimes you find a sweet spot to go at and know what those revs are could be useful
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