Jabiru 2200 inspection: Engine Damage?


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Posted (edited)

I just bought a Jabiru 2200, that shows a log book recorded factory overhaul about 200 hours ago. The seller said the engine ran great 4 months ago when the repair hangar (across rom his hangar) upgraded the previous owner's (not the seller) CH701 to a Rotax 100hp for more thrust, and then the repair shop sold the engine to the guy who ultimately sold it to me this last weekend. This seller claimed he saw the engine run strong 4 months ago, he bought it for himself, and then he changed directions and now sold it to me. The motor (so he said) sat in a hangar under a plastic tarp-like cover. When I bought the motor, I did not do any compression or other internal checks (go easy on me here) In faith I took his word on it. We both had military background, and I hope he would not fleece me like that.

Now, yesterday, as I was checking the motor out in my garage, I looked at the plugs (they looked good [light tan electrode insulators] but they seemed to have a lot of friction in the threads), and then I pulled them out to check the cylinders. I will share those pictures later if I can. One of the cylinders had what looked to be oil passing the porcelain on the plug. There also seems to be oil residue need these plugs (see picture). I did not see this on the other cylinders. Note: all of the plugs looked the same on the inside (light tan). Looking into the cylinder in question, I turned the crank 360 degrees, and looked inside the cylinder with a scope. I found some white flaky material in the cylinder (small amount). I was able to move the white material around with a small screw driver while observing with my scope. Note: the tops of all of the pistons looked the same (I will post pics later). I did not observe this flaky residue in the other cylinders. Now, the motor was sitting for 4 months (I was told), and the muffler wan not attached (just the header runners were attached). Perhaps some bees or mud dobbers made a nest in there depositing clay.?.  But, what about the oil looking residues near the plug holes and the blow by on the plug.?. I may have to pull the head, for further inspection, but I am looking for experiences and thoughts here.

IMG_1893.jpg

Edited by Supermotive
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Posted

I believe the hole in between the spark plugs is for attaching a CHT probe.  Is it drilled just a bit to deep and you are getting some leakage from the valve train in the head?  Maybe pull the valve cover and blow some compressed air into the hole??  JImChuk

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Posted

Got it. Will do.

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Posted


The oil is probably somebody set the engine upside down or leaned it one way really far just a guess.  Im sure the engine is good to go because if I had 200 hrs smoh and there was an issue I would not sell the engine I would send it back.  And I think Pete who would have been in charge at that time would have taken care of it.  Compression checks are really only accurate on hot engines. Your finger over each plug hole will tell you alot. Good luck these engines are built really well And I sure do like mine.

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Posted

Thanks TJay. Are you connected with Jabiru? I think this motor is pretty decent. I am happy so far. The image below is the overhaul slip. They updated the motor a good bit. If there are any other mods you recommend, please share. Thanks again. 
 

E70014DF-C0C1-4880-A52F-470A074379D4.jpeg

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Posted


That looks great I should have them do that to my engine too.

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