John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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 Posted: Sun Jun 07, 2009 7:52 am Post subject: Rotax 912 Longevity |
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Most of us don't have to worry about Rotax overhauling our 912 engines
because we don't fly enough to get anywhere near the Rotax Factory TBO,
which is or will be 2000 hours.
Think it will take 4 hours every weekend for 10 years to amass 2,080.0
hours. That's about 208 hours a year. If you fly 104 hours a year, it will
take 20 years to get to TBO, which will probably be 3000 hours TBO by that
time. 
I've got 389.0 hours on my 912ULS since new about two years ago. If I keep
it, I have no qualms about flying it 3,000.0 plus hours without overhaul.
I'll leave the serious numbers to the engineers on the List. For my
purposes, 3,000.0 hours X 80 mph equals 240,000 miles. Most any auto or
truck engine mass produced today will make that mark and still be in good
running condition.
Based on more than 2,500.0 912 hours on my mkIII, I think the heads would
have to rebuilt by 3,000.00. Engine accessories that won't make it will be
carbs, spark plug connectors. Other than that, probably not much.
Couple years ago, Eric Tucker told me there had never been a 912 cylinder
replaced.
I think as long as I keep the oil changed frequently, more frequently than
the factory specifies, especially when operating on 100LL, my little engine
will last a very long time.
john h
mkIII
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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