There used to be a lot of buzz (pun intended!) about excessive rf noise generated by early Jabiru engines.  My engine (#2427) was built in the transition from Gen 2 to Gen 3, so it has some of the Gen 3 upgrades but certainly not all.

My engine seemed "noisy" electronically - it had a lot of background static on distant radio transmissions.  I've followed the Jabiru-CAMit Owners Group for years and had seen similar reports and I implemented some of the suggested fixes - ferrite chokes on various wires, resistor plugs, etc.  I made some incremental improvements but the biggest improvement was completely replacing the distributor and spark plug leads with high-quality spiral wound wiring (obtained from the now-defunct CAMit).  Currently, I have hundreds of hours on these leads and the results are quite satisfactory.

Maybe I've not been paying attention, but now that I think about it, I don't recall seeing many, if any, reports about rf interference problems with the Gen 3 engines and absolutely no reports with Gen 4.

Now that there are a number of Gen 4's getting into Zenith's, I just thought I'd solicit Gen 4 owners about their experience as far as rf interference?  Any better or worse than other Jab's or other engines?

John

N750A

Jab 3300