Jabiru 3300 CHT Sensor Relocation - Zenith Aircraft Builders and Flyers2024-03-29T06:47:43Zhttps://zenith.aero/forum/topics/jabiru-3300-cht-sensor-relocation?commentId=2606393%3AComment%3A375620&feed=yes&xn_auth=noOMG!! Thank you SOOOOO much f…tag:zenith.aero,2023-06-29:2606393:Comment:9074012023-06-29T22:46:46.705ZTerry Woodhttps://zenith.aero/profile/TerryWood
<p>OMG!! Thank you SOOOOO much for this I have been fighting my CHT's false reading for awhile now and this will stop me from banging my head on the wall. Going to the airport to take care of this piss poor design right now! </p>
<p>OMG!! Thank you SOOOOO much for this I have been fighting my CHT's false reading for awhile now and this will stop me from banging my head on the wall. Going to the airport to take care of this piss poor design right now! </p> Hi Guys
I did the mod a coupl…tag:zenith.aero,2014-08-24:2606393:Comment:3756202014-08-24T14:43:59.785ZPhill Barneshttps://zenith.aero/profile/PhillBarnes
<p>Hi Guys</p>
<p>I did the mod a couple of years ago on advise from the Jab Aust factory. They should have been set up like this from the factory. The engine department told me that it was designed for a probe but the probe was never manufactured.</p>
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<p><a href="http://www.mykitlog.com/users/category.php?user=ch601xl&project=614&category=4603" target="_blank">http://www.mykitlog.com/users/category.php?user=ch601xl&project=614&category=4603…</a></p>
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<p>Hi Guys</p>
<p>I did the mod a couple of years ago on advise from the Jab Aust factory. They should have been set up like this from the factory. The engine department told me that it was designed for a probe but the probe was never manufactured.</p>
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<p><a href="http://www.mykitlog.com/users/category.php?user=ch601xl&project=614&category=4603" target="_blank">http://www.mykitlog.com/users/category.php?user=ch601xl&project=614&category=4603</a></p>
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<p><a class="next_photo_link" href="http://www.zenith.aero/photo/cht-probe/next?context=album&albumId=2606393%3AAlbum%3A40994"><img width="737" height="552" alt="cht probe" src="http://storage.ning.com/topology/rest/1.0/file/get/2131600631?profile=RESIZE_1024x1024"/></a></p>
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<td><div style="text-align: right; padding-bottom: 3px;">Category Work Time: <b>58 Hours</b></div>
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<tr><td class="chartbasic" style="text-align: left;" colspan="4"><p> <a style="text-decoration: none;" href="http://www.mykitlog.com/users/display_log.php?user=ch601xl&project=614&category=4603&log=124412&row=1"><img width="113" height="83" title="8mm flush trim router bit bored to accept a 1/8" style="width: 233px; height: 217px;" src="http://www.kitlog.com/photos/project_614/thumb/FP21032011A00003.jpg" border="0"/></a> </p>
<p><a style="text-decoration: none;" href="http://www.mykitlog.com/users/display_log.php?user=ch601xl&project=614&category=4603&log=124412&row=1"><img width="113" height="83" title="This hole was designed by Jab engineers as a cht pickup but a probe was never designed (Click Here to view Full Log Entry)" style="width: 280px; height: 226px;" src="http://www.kitlog.com/photos/project_614/thumb/FP21032011A00004.jpg" border="0"/></a></p>
<p> <a style="text-decoration: none;" href="http://www.mykitlog.com/users/display_log.php?user=ch601xl&project=614&category=4603&log=124412&row=1"><img width="113" height="83" title="Threaded to an 8/32 thread. Some engines have had this mod done at Jab factory at customers request (Click Here to view Full Log Entry)" style="width: 239px; height: 193px;" src="http://www.kitlog.com/photos/project_614/thumb/FP21032011A00005.jpg" border="0"/></a></p>
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<p></p> Update!
I periodically check…tag:zenith.aero,2014-08-21:2606393:Comment:3753532014-08-21T14:36:12.209ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>Update!</p>
<p>I periodically check the CAMit website to see what's the latest upgrade that Ian Bent has come up with for the 3300. They are now offering a <a href="http://camitaeroengines.net/collections/ancillary-parts/products/engine-cht-sensor" target="_blank">CHT sensor</a> made specifically for the 3300 utilizing the same factory hole I used. Looks like it will be necessary to drill the hole out slightly larger and tap for an 8-32 thread, but certainly appears to be a sturdy sensor…</p>
<p>Update!</p>
<p>I periodically check the CAMit website to see what's the latest upgrade that Ian Bent has come up with for the 3300. They are now offering a <a href="http://camitaeroengines.net/collections/ancillary-parts/products/engine-cht-sensor" target="_blank">CHT sensor</a> made specifically for the 3300 utilizing the same factory hole I used. Looks like it will be necessary to drill the hole out slightly larger and tap for an 8-32 thread, but certainly appears to be a sturdy sensor harness! No price is listed - I suspect it's not cheap, but neither is overheating your engine!</p>
<p>John</p> I did find this pic in my fil…tag:zenith.aero,2014-08-19:2606393:Comment:3750532014-08-19T18:51:24.026ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2171009447?profile=original" target="_self"></a>I did find this pic in my files:</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2171009447?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2171009447?profile=RESIZE_1024x1024" width="721"></img></a> It clearly shows the factory-drilled 1/8" hole between the plugs and the spark-plug ring sensor on the right spark plug. You can see the four ridges/apexes of the fins immediately below the hole. These have to be ground down a few…</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2171009447?profile=original" target="_self"></a>I did find this pic in my files:</p>
<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/2171009447?profile=original" target="_self"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2171009447?profile=RESIZE_1024x1024"/></a>It clearly shows the factory-drilled 1/8" hole between the plugs and the spark-plug ring sensor on the right spark plug. You can see the four ridges/apexes of the fins immediately below the hole. These have to be ground down a few mm so the sensor can be laid flat against the hole when screwed-down tight.</p>
<p>John</p> The day I did the switch-over…tag:zenith.aero,2014-08-18:2606393:Comment:3746582014-08-18T19:32:10.935ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>The day I did the switch-over, Mack, I was so anxious to get everything buttoned-up and tested that <em>after</em> the cowl was installed, I thought, "Gee, I wish I had remembered to take some pictures!" HA!</p>
<p>So, I'm in the flying and not "fixing" mode now, so hopefully I don't have to pull that cowl 'til the next oil change! However, the pictures in AVDALSR085-1 that I linked in the first post are really quite similar to what I did. The biggest difference is that I did not completely…</p>
<p>The day I did the switch-over, Mack, I was so anxious to get everything buttoned-up and tested that <em>after</em> the cowl was installed, I thought, "Gee, I wish I had remembered to take some pictures!" HA!</p>
<p>So, I'm in the flying and not "fixing" mode now, so hopefully I don't have to pull that cowl 'til the next oil change! However, the pictures in AVDALSR085-1 that I linked in the first post are really quite similar to what I did. The biggest difference is that I did not completely remove the ring sensors, instead, I just clipped off the ring and drilled the base of the ring for the screw. Works fine that way!</p>
<p>If I have to pull the cowl anytime soon, I'll take some pics.</p>
<p>John</p> John,
Why don't you post some…tag:zenith.aero,2014-08-18:2606393:Comment:3747532014-08-18T19:10:11.833ZMack P. Kreizenbeckhttps://zenith.aero/profile/MackPKreizenbeck
<p>John,</p>
<p>Why don't you post some photos of your work?</p>
<p>Mack</p>
<p>John,</p>
<p>Why don't you post some photos of your work?</p>
<p>Mack</p>