TBO for 1978 J model

[nels]

I always thought the recommended TBO for the 200 HP IO 360  Lycoming was 2000 hrs but my pilots manual says it's only 1600 hrs. Was there an update that got it up to 2000 hr TBO sometime between 1978 and today?? My engine is the original IO-360- A3B6D.

[Guest]

Here is the current version of the TBO recommendation

http://www.lycoming.com/portals/0/techpublications/serviceinstructions/si1009aw_recommended_tbo_periods.pdf

Clarence

[ArtVandelay]

There is a service instruction 1009 from Lycoming, you will need to know your serial number.

[nels]

Thanks, guys. Now I feel better.

[carusoam]

Around Y2K was an interesting time to buy an airplane.  Some engines had shorter TBOHs.  The diameter of the valve stems was responsible for the shorter lifespan 1200 vs. 2000 hrs.

PPIs became essential to ferret out what engine details you might be buying into.

You can see some notes regarding the 1/2" valve stems vs. 7/16" in the doc that Doc posted.

Running 50° ROP following the POH could also cause some shorter engine life.

Usual note: I am a PP, not a mechanic...

Best regards,

-a-