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What is the difference between Lycoming YIO-540 and XI)-540?

 
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Mauledriver(at)nc.rr.com
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PostPosted: Sun Jul 31, 2011 4:55 pm    Post subject: What is the difference between Lycoming YIO-540 and XI)-540? Reply with quote

The 'IO-540 I got thru Vans appears to be officially listed in the doc
as a YIO-540. The 'experimental' and lower priced engine option. In
other write-ups I see references to XIO-540s.

What's up with that?

Bill "hoping for first start-up tomorrow" Watson


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bill.peyton



Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

PostPosted: Sun Jul 31, 2011 7:03 pm    Post subject: Re: What is the difference between Lycoming YIO-540 and XI)- Reply with quote

You purchased the experimental non-certified version of the engine. The certified costs around $3K more! In reality it is the identical engine, just a different part number....... Call Lycoming, I did.

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Bill
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rv10flyer



Joined: 25 Aug 2009
Posts: 364

PostPosted: Mon Aug 01, 2011 11:19 am    Post subject: Re: What is the difference between Lycoming YIO-540 and XI)- Reply with quote

I have YIO-540 too. Fuel servo, flow divider, fuel nozzles and data plate are different but still must meet same test cell specs.

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