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Old 23 May 2015, 06:55   #1
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Rev counter

Hi all. Can anyone send me a link to a rev counter to buy as I want to check out my engine. 8hp Mariner 8b. I have looked on ebay and can't find a test one.
Thank you

Andy
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Old 23 May 2015, 08:47   #2
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Not sure how to link but Digital Tach Hour Metre,should come straight up.
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Old 23 May 2015, 13:46   #3
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Cheap one
http://pages.ebay.com/link/?nav=item...d=221770858676
Better one
http://pages.ebay.com/link/?nav=item...d=200875873269
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Old 23 May 2015, 15:00   #4
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Thanks to you both. Liked the "better one" though.
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Old 23 May 2015, 17:00   #5
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Don't blame you. I have both, both work, but the better one has a much clearer display. Factor in some import tax if considering though.
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Old 25 May 2015, 04:27   #6
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LCD Digital Engine Tach Tachometer Hour Meter Gauge for Racing Motorcycle UK | eBay
These are not bad either, pretty much a copy of a tiny tach
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Old 28 May 2015, 23:16   #7
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I tried for a couple hours to find a spot on my Merc 15's spark plug wires that'd make my trail tech tto portable tach work. I couldn't get it to read reliably. I would get a stable reading, but then it'd just start going all over the place again. Tried switching the sensitivity as well.

Those portable tachs are nothing more than a digital display with a long wire antenna attached to them, anything electrical going on in the motor will interfere. I found that even if I somehow managed to get a somewhat reliable reading, placing the cowl back on the motor ruined it. I resigned to the fact that messing around with it any further was a fool's errand, especially since the cowl seems to be like reflecting the interfering signals back inwards (which the trail tech tach would pick up).
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Old 29 May 2015, 05:04   #8
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Quote:
Originally Posted by kestrel452 View Post
I tried for a couple hours to find a spot on my Merc 15's spark plug wires that'd make my trail tech tto portable tach work. I couldn't get it to read reliably. I would get a stable reading, but then it'd just start going all over the place again. Tried switching the sensitivity as well.

Those portable tachs are nothing more than a digital display with a long wire antenna attached to them, anything electrical going on in the motor will interfere. I found that even if I somehow managed to get a somewhat reliable reading, placing the cowl back on the motor ruined it. I resigned to the fact that messing around with it any further was a fool's errand, especially since the cowl seems to be like reflecting the interfering signals back inwards (which the trail tech tach would pick up).
Hi

What about once connected to the HT lead, try covering the rest of the lead with insulation tape just a thought.Also have the lead running directly outside of the engine cowl.
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Old 29 May 2015, 06:26   #9
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Quote:
Originally Posted by kestrel452 View Post
I tried for a couple hours to find a spot on my Merc 15's spark plug wires that'd make my trail tech tto portable tach work. I couldn't get it to read reliably. I would get a stable reading, but then it'd just start going all over the place again. Tried switching the sensitivity as well.

Those portable tachs are nothing more than a digital display with a long wire antenna attached to them, anything electrical going on in the motor will interfere. I found that even if I somehow managed to get a somewhat reliable reading, placing the cowl back on the motor ruined it. I resigned to the fact that messing around with it any further was a fool's errand, especially since the cowl seems to be like reflecting the interfering signals back inwards (which the trail tech tach would pick up).
I found the opposite on my Merc 15, worked perfectly (10 Chinese job) - just wound the wire around the HT lead next to the plug, fed the wire out under the cowl seal and worked great.
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Old 29 May 2015, 06:33   #10
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Same with mine,just the display is angle sensitive.
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