TBO 2000?

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geneticistx
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TBO 2000?

#1 Post by geneticistx » Tue Jun 20, 2017 9:45 pm

Hi there,
I'm looking at getting a plane, and one i came across looks pretty good.

There is 1800 hours on the 2000 TBO (cessna 172)

I've been told that the oil consumption is very low and there is no metal to be seen or found.

What is truly a typical TBO for a 172 engine, if it has been maintained properly?

thanks
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black hole
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Re: TBO 2000?

#2 Post by black hole » Tue Jun 20, 2017 10:13 pm

5000 hours is not unheard of.

BH
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AirFrame
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Re: TBO 2000?

#3 Post by AirFrame » Wed Jun 21, 2017 6:31 am

What BlackHole said. Many O-320's are run well beyond their TBO successfully when they are monitored for oil consumption, metal generation, and good compression.

That being said, 5000 hours is not unheard of, but it's not "normal" either. An engine that's run daily, not abused, and stored in a dry hangar is more likely to get there than one that's run 10 hours a year and parked outside, however.
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CFR
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Re: TBO 2000?

#4 Post by CFR » Thu Jun 22, 2017 2:59 am

While you can go beyond TBO, do not think this means no major work. If an engine gets to 5000 hours it will still likely have gone through a number of cylinder changes, mag rebuilds, etc along the way. Plus there will be the lesser costs such as generator rebuilds, vacuum pumps, etc.
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edmanster
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Re: TBO 2000?

#5 Post by edmanster » Tue Nov 07, 2017 10:51 am

What O-320 engine is is ?? -H2AD ?? .. who overhauled it? How long ago? Was it a school AC? did it fly 5 hours a year? Was it located on the coast? How are the rubber parts - look like new or all cracked? Original new cylinders or been OH several times .. just some of the questions to consider .. Who was the mech who been signing it out, thorough or just oil & plugs - and looked the other way on jobs that he did not want to do ..
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Piston Power
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Re: TBO 2000?

#6 Post by Piston Power » Mon Nov 20, 2017 7:08 am

Our maintenance schedule approval allows us to run our O-320-H2AD and IO-360-L2A engines to 2200 Hours. At this time cylinder compression are generally around 75/80 to 78/80psi with low oil consumption. We likely could run them much longer.

Also keep in mind that a very high time engine may not yield much return in the cost of the engine core.
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