Problem with left mag, Jabiru 3300 engine - Zenith Aircraft Builders and Flyers2024-03-28T22:19:17Zhttps://zenith.aero/forum/topics/problem-with-left-mag-jabiru-3300-engine?commentId=2606393%3AComment%3A727282&x=1&feed=yes&xn_auth=noSo what was the issue? I'm h…tag:zenith.aero,2022-09-13:2606393:Comment:8779512022-09-13T03:15:21.719ZDan Dempseyhttps://zenith.aero/profile/DanDempsey
<p>So what was the issue? I'm having the same problem.</p>
<p>So what was the issue? I'm having the same problem.</p> Dear John:
Thanks again. I w…tag:zenith.aero,2020-07-05:2606393:Comment:7272822020-07-05T16:37:34.596ZEugene Stone-Romerohttps://zenith.aero/profile/EugeneStoneRomero
<p>Dear John:</p>
<p></p>
<p>Thanks again. I will check the Jabiru manual for the proper clearance.</p>
<p></p>
<p>Best regards,</p>
<p></p>
<p>Gene</p>
<p>Dear John:</p>
<p></p>
<p>Thanks again. I will check the Jabiru manual for the proper clearance.</p>
<p></p>
<p>Best regards,</p>
<p></p>
<p>Gene</p> Dear Don:
Thanks for your re…tag:zenith.aero,2020-07-05:2606393:Comment:7273572020-07-05T16:35:55.326ZEugene Stone-Romerohttps://zenith.aero/profile/EugeneStoneRomero
<p>Dear Don:</p>
<p></p>
<p>Thanks for your recommendation, it's much appreciated. . I will give it a try before doing anything else.</p>
<p></p>
<p>Best regards,</p>
<p></p>
<p>Gene</p>
<p>Dear Don:</p>
<p></p>
<p>Thanks for your recommendation, it's much appreciated. . I will give it a try before doing anything else.</p>
<p></p>
<p>Best regards,</p>
<p></p>
<p>Gene</p> Don's advice is spot-on! Als…tag:zenith.aero,2020-07-05:2606393:Comment:7272442020-07-05T13:35:32.352ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>Don's advice is spot-on! Also be sure that you have cooling air diverted to the coils. You need ducts about 1/2" min. i.d. coming off the ram-air ducts and aimed at the coils - it's covered in the FWF installation manuals that I "think" are still available on-line, as are the factory Jabiru maintenance manuals.</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/2268428073?profile=original" rel="noopener" target="_blank"><img class="align-full" src="https://storage.ning.com/topology/rest/1.0/file/get/2268428073?profile=RESIZE_710x" width="300"></img></a></p>
<p>In the above pic you can see…</p>
<p>Don's advice is spot-on! Also be sure that you have cooling air diverted to the coils. You need ducts about 1/2" min. i.d. coming off the ram-air ducts and aimed at the coils - it's covered in the FWF installation manuals that I "think" are still available on-line, as are the factory Jabiru maintenance manuals.</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/2268428073?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/2268428073?profile=RESIZE_710x" width="300" class="align-full"/></a></p>
<p>In the above pic you can see the white PVC duct coming off the ram-air duct.</p>
<p></p>
<p>John</p> Don't know if this would help…tag:zenith.aero,2020-07-05:2606393:Comment:7272692020-07-05T13:28:53.105ZDon Burkholderhttps://zenith.aero/profile/DonBurkholder
<p>Don't know if this would help but did you check and set the clearances of the magnets and the coils? This would be a good place to start and it's easy to do.. I bought some brass shimstock that measures .010 and cut out strips large enough to place between the coil and magnets. Clean any rust off of the flywheel magnets gently. Turn the prop to align coil and magnets up, insert the shimstock, loosen the coil screws and the magnet will pull things together, tighten screws then remove the…</p>
<p>Don't know if this would help but did you check and set the clearances of the magnets and the coils? This would be a good place to start and it's easy to do.. I bought some brass shimstock that measures .010 and cut out strips large enough to place between the coil and magnets. Clean any rust off of the flywheel magnets gently. Turn the prop to align coil and magnets up, insert the shimstock, loosen the coil screws and the magnet will pull things together, tighten screws then remove the shimstock. You may find it difficult to remove the brass shimstock if there was any rust not cleaned prior. You might need to rotate the prop a little to remove the shimstock but now you know you have the minimum clearances called for by Jabiru..</p>
<p> As far as my memory of checking coils for the proper resistances OHMs, they are given in the Jabiru engine manual. </p>
<p>Another thought is if the weak side occurs when engine is hot vs being fine at cold start up. This would indicate a coil issue. Check your distributor caps and rotors for pitting and burning. Aluminum is used for the contacts in the caps. This burns away quickly. On my 2200 Jabiru I found and installed a distributor caps and rotors that had brass contacts from an automotive application that I purchased from a local NAPA store. Even used suppression core wires and NGK Iridium spark plugs. These plug lasted a long time.</p>
<p>All modifications with good results as I could idle it down to 300 to 400 rpm and you could not feel any vibration and was very quiet.</p>
<p>So, in summation. It could be a defective coil or output wire, coil clearances to magnet, pitted distributor caps creating excessive cap to rotor clearances. I eventually sold my plane, but I loved to work on and improve the Jabiru engine...</p> Thanks John. I will contact t…tag:zenith.aero,2020-07-04:2606393:Comment:7271752020-07-04T19:35:59.720ZEugene Stone-Romerohttps://zenith.aero/profile/EugeneStoneRomero
<p>Thanks John. I will contact them on Monday!</p>
<p></p>
<p>Best regards,</p>
<p></p>
<p>Gene</p>
<p>Thanks John. I will contact them on Monday!</p>
<p></p>
<p>Best regards,</p>
<p></p>
<p>Gene</p> Support and all parts should…tag:zenith.aero,2020-07-04:2606393:Comment:7271302020-07-04T19:33:48.924ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p>Support and all parts should be available from the US Jabiru distributor, Arion Aircraft : <a href="http://www.flylightning.net/" target="_blank" rel="noopener">www.flylightning.net</a>.</p>
<p></p>
<p>John</p>
<p>N750A</p>
<p>Support and all parts should be available from the US Jabiru distributor, Arion Aircraft : <a href="http://www.flylightning.net/" target="_blank" rel="noopener">www.flylightning.net</a>.</p>
<p></p>
<p>John</p>
<p>N750A</p>