Anyone have any personal experience with Subject? I’m considering this as an engine option. 

Jim

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I follow a guy on you tube, his name is Trent Palmer. He had a Kitfox with a 912 with a big bore kit with a few other mods done to it and it blew up on him. Luckily he had an open spot to land under him. He did say he didn't have much history on the motor but he did say, never again. Food for thought.     

I also follow Trent, and believe he later said the cause was a rod failure, that they could not explain other than it was a defective part. I believe he going with a new 915, lucky guy.

Bill

I think the bottom line is, if you don't know the complete history of a used modified engine your taking your life in your hands.

Interesting and thanks for bumping up this discussion, I definitely won’t buy any airplane engine without a proper log, big bore kit or not, although that in of itself won’t guarantee a thing.  I look forward to hearing from anyone who has owned and flown a 912 with a big bore kit installed. 

I recently took Rotax training with a very experienced guy. He is not a fan of the big bores. He said you will not make TBO.

Thanks, did he say why?

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