Zenith Aircraft Builders and Flyers
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Ordering a Jab 3300 Gen 4
Hi Gang
About to order a Gen 4 3300 for my XLB and have a few Q.
It states Please note that the Gen 4 engine cannot use tacho tabs. Please order a Tacho Hall Effect kit if an EMS is not installed. Now I will be using a Grand Rapids EIS so do I need to order a Tacho Hall Effect? or is an EIS classed as an EMS?
Which is better the Tractor single or duel and straight exhaust pipes?
For those that may have been before me, someone said the Ram Air ducts on the Gen 4 are larger and that the XLB/650 Jab USA FWF cowls don't fit anymore. Is this correct or just someone speaking BS. Is there any real world stories and not wives tails. The new Heads don't rub on the old cowls do they, I assume its a straight swop over if you already have a Gen 3?
Any other Engine order suggestions? I have a XLB/650 FWF kit from Jab USA already.
Getting closer to finished.
Chris
Replies to This Discussion
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Permalink Reply by John L Warren on
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Chris, I have a gen4 in my 750 Cruzer.. the only problem I had was that the single exhaust pipe was not long enough to reach outside the cowling.. I just added an extension for the fix.. I don't know how much difference there is between our cowlings but I had no problem with my ram air ducts fitting.. I have been flying mine for 2 1/2 years with no problems at all, I have 400 hrs on it.. John
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Permalink Reply by John Austin on
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I've got a 3300 built in the transition from Gen 2 to Gen 3. I, too, had to add an exhaust extension to adequately clear my 750 STOL's cowl. If you add an extension, it's a good idea to attach an exhaust hanger to support the pipe and reduce the possibility of the exhaust pipe cracking at the muffler due to unsuspended weight.
John
N750A
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Permalink Reply by Bob Simmons on
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Your Grand Rapids EIS should be fine.
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Permalink Reply by Steffen Glatz on
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'It states Please note that the Gen 4 engine cannot use tacho tabs. Please order a Tacho Hall Effect kit if an EMS is not installed. Now I will be using a Grand Rapids EIS so do I need to order a Tacho Hall Effect? or is an EIS classed as an EMS?'
In case of electrical connection it shows only one ignition circuit. I.e. during the magneto check it shows the speed drop on one ignition circuit, on the other it drops to zero !
This looks pretty funny and can only be fixed with this extra sensor. The bracket for the sensor is already mounted on the engine.
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Your GRT should be fine as an EMS. I'm not qualified to comment on the magneto issue. But again, you should contact Arion Aircraft.
They are the US distributor for Jabiru engines, used to market and build Jabiru aircraft kits, and were once a GRT dealership. They can be difficult to communicate with sometimes, but they should have all, the answers you need.
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