Jabiru 3300A distributor Cap

[Nick]

I was working on my Waiex and Jabiru 3300A. I was making sure bolts and nuts were tight and doing a general wiring. While I was doing this I noticed that the distributor caps were loose so I started to tighten. I could not find any kind of indexing point on the distributor cap. I could turn or twist a couple degrees with the hold down screws. My question is this normal or do I have defective Caps. There has to be some kind of indexing or the timing could change. These are new distributor caps, but I still have the ones that I got with the motor and they are the same. AM I MISSING SOMETHING HERE? I bought the motor that sat for 10+ years and did a top end overhaul on it. So it has not run yet. Any advise Please, Thanks OH PS There was someone just the other day that came by and they have a 2200A and they checked theirs and there is an indentation where the hold down clamp indexes on their distributor cap.

[peter anson]

On my early model engine the distributor caps were still slightly loose with the clamps fully tightened so I added a thin strip of rubber to the notch where the clamp fits. That worked fine. The location doesn't have to be super accurate. You can't change the ignition timing by having the cap a degree either way. As long as the notches in the cap line up with the clamps it's fine.

Peter

[Nick]

Thanks Peter, I finally got ahold of Nick at Jabiru and he basically said the same thing. The only difference was he would sand down the bottom of the hold down clamp to make it tighter. Thanks again.