Mon, Feb 22, 2010
At the 2010 Sport Aviation Expo, Rotax premiered their new 2010
model of the 912 ULS engine. Popular among the LSA industry,
the 4 stroke 9 series Rotax engine premiered in 1989. When it
debuted, the engine featured a 600-hour time between overhaul
(TBO).
Over time, with much refinement and evolution, Rotax gradually
raised TBO times from 600 hours to 1200 hours to 1500 hours.
Now, twenty years after its debut, the 912ULS engines have
had their recommended TOB raised to 2,000 hours.
Effective on December 14th, 2009, the 91ULS TBO increase comes
as a result of several component upgrades within the
engine. 2010 models, as well as most engines produced over the
last three to four years, feature all-new crankcases. In
addition, the new engines feature fire-sleeving on fuel pump lines,
new corrosion-preventing coating on carburetors, and new ignition
modules. The new ignition modules feature a more sophisticated
spark advance to go from start-up spark timing to the running
timing.
The extension will apply to all new engines made and to a select
serial range of older 912 series A, F, and S engines going back to
2006 production. If the engine ever had a crankcase change, within
the past 2 years, it may also qualify if that part was updated to
the current model specification. Owners are advised to read
the bulletin carefully to see if their particular engine is
included, or contact a regional independent Service Center
(iSC). Centers can be located by checking the Rotax Flying
Club web site.
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