Erratic tach reading - Zenith Aircraft Builders and Flyers2024-03-28T10:54:47Zhttps://zenith.aero/forum/topics/erratic-tach-reading?commentId=2606393%3AComment%3A118938&feed=yes&xn_auth=noTry a "Tiny Tach" from Aircra…tag:zenith.aero,2011-05-03:2606393:Comment:1189382011-05-03T10:45:21.381ZBob McDonaldhttps://zenith.aero/profile/BobMcDonald
Try a "Tiny Tach" from Aircraft Spruce. Attach to panel with velcrow tape, then simply wrap the wire lead a few times around a single spack plub lead wire. ..."installation complete". Tiny Tach shows engine rpm digitally when engine running and then show "HOBBS" time when engine shutdown. Cheap, simple and works great. I used one for 10 yrs and never had an issue. Available in 2-stroke & 4-stroke models.
Try a "Tiny Tach" from Aircraft Spruce. Attach to panel with velcrow tape, then simply wrap the wire lead a few times around a single spack plub lead wire. ..."installation complete". Tiny Tach shows engine rpm digitally when engine running and then show "HOBBS" time when engine shutdown. Cheap, simple and works great. I used one for 10 yrs and never had an issue. Available in 2-stroke & 4-stroke models. I found that connecting to a…tag:zenith.aero,2011-05-03:2606393:Comment:1190222011-05-03T06:40:41.880ZIan McClellandhttps://zenith.aero/profile/IanMcClelland
I found that connecting to a coil wire did not work well. A alternator wire is better. I suspect using the Jabiru pickup off the flywheel would be the best option. I have not tried that method yet though.
I found that connecting to a coil wire did not work well. A alternator wire is better. I suspect using the Jabiru pickup off the flywheel would be the best option. I have not tried that method yet though. I connected the "signal input…tag:zenith.aero,2011-05-03:2606393:Comment:1191552011-05-03T03:59:24.714ZRobert E Pickenshttps://zenith.aero/xn/detail/u_0qgzwqu4g7edn
I connected the "signal input" to one, either, of the wires from the alternator and ahead of the voltage regulator per UMA instructions on "Engine Connections" for a Jabiru engine. Bob Pickens
I connected the "signal input" to one, either, of the wires from the alternator and ahead of the voltage regulator per UMA instructions on "Engine Connections" for a Jabiru engine. Bob Pickens Many thanks to all for your c…tag:zenith.aero,2011-05-03:2606393:Comment:1191012011-05-03T03:09:23.215ZFelipe Uribe Posadahttps://zenith.aero/profile/FelipeUribePosada
<p>Many thanks to all for your comments.</p>
<p>I agree with Robert on the lousy hour meter, but it will have to do as is. Robert, When you say lighting lead, the tach conects to which of the two leads on the coil, the one going to the switch or to the one going to the distrtibutor?</p>
<p> </p>
<p>I will also do what logic and Mack sugests, check the conector to discard faulty wirings.</p>
<p>best regards,</p>
<p> </p>
<p> </p>
<p>Many thanks to all for your comments.</p>
<p>I agree with Robert on the lousy hour meter, but it will have to do as is. Robert, When you say lighting lead, the tach conects to which of the two leads on the coil, the one going to the switch or to the one going to the distrtibutor?</p>
<p> </p>
<p>I will also do what logic and Mack sugests, check the conector to discard faulty wirings.</p>
<p>best regards,</p>
<p> </p>
<p> </p> My Tack drops off to zero whe…tag:zenith.aero,2011-05-03:2606393:Comment:1189882011-05-03T02:01:09.928ZRobert E Pickenshttps://zenith.aero/xn/detail/u_0qgzwqu4g7edn
My Tack drops off to zero when idle speed goes below 800RPM. UMA told me that is normal when using a lighting lead. The only other problem I have is that it is almost impossible to read the hour-meter, the hundredth's and tenth's, the red digits do not show up very well The magnifying lens is worthless. I am considering a separate hour-meter. Bob Pickens, Troy, Mo.
My Tack drops off to zero when idle speed goes below 800RPM. UMA told me that is normal when using a lighting lead. The only other problem I have is that it is almost impossible to read the hour-meter, the hundredth's and tenth's, the red digits do not show up very well The magnifying lens is worthless. I am considering a separate hour-meter. Bob Pickens, Troy, Mo. Had similar problem myself, b…tag:zenith.aero,2011-05-03:2606393:Comment:1190932011-05-03T01:03:03.939ZMack P. Kreizenbeckhttps://zenith.aero/profile/MackPKreizenbeck
<p>Had similar problem myself, but it was quit a while ago, so can't remember which offending wire it was.</p>
<p>Go back and recheck the wiring schematic & directions -- make sure that everything is wire correctly.</p>
<p>I had one two many wires hooked up -- disconnected it and everything went well afterward.</p>
<p>Mack</p>
<p>Had similar problem myself, but it was quit a while ago, so can't remember which offending wire it was.</p>
<p>Go back and recheck the wiring schematic & directions -- make sure that everything is wire correctly.</p>
<p>I had one two many wires hooked up -- disconnected it and everything went well afterward.</p>
<p>Mack</p> G'Day. My dynon does the same…tag:zenith.aero,2011-05-02:2606393:Comment:1190882011-05-02T23:12:57.862ZPaul Hammondhttps://zenith.aero/profile/PaulHammond
<p>G'Day. My dynon does the same goes a bit eratic , cruise is fine, high rpm and low rpm are a little weird .But while the big fan up front keeps going round i dont care</p>
<p>paul</p>
<p>G'Day. My dynon does the same goes a bit eratic , cruise is fine, high rpm and low rpm are a little weird .But while the big fan up front keeps going round i dont care</p>
<p>paul</p>