Rotax 912 service, Rotax 912 recommended maintenance and service schedule.
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912 Rotax amateur built, experimental, ultralight and light sport aircraft
engine recommended maintenance schedule.
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The following recommended engine inspection
and maintenance schedule is based upon the operational experience of
L'IL HUSTLER ULTRALIGHT AVIATION SERVICES
and is to be used in addition to and in conjunction with
the service information provided by the engine manufacturer.
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Where the following is in
contradiction to the service information provided by the engine manufacturer, use the
information provided by the engine manufacturer. Where inspection of a component part is
specified, replace the component part if necessary.
Spark plugs, when
using 100LL avgas -Inspect at 50
hour intervals of operation. Renew at 100 hour intervals of operation - NOTE the 912 was
designed and intended to be run on UNLEADED fuels with a minimum of 89 octane. Fuels such
as 100 LL avgas tend to contaminate the engine.
Spark plugs, when using unleaded auto
fuels -Renew at 100 hour intervals
of operation. Also check spark plug caps for snug fit vibration/heat/cold tend to loosen
caps over time.
Oil & filter,
when using 100 low lead avgas
-Inspect
for proper oil level at preflight and add as necessary. Renew at 50 hour intervals of
operation - this is necessary due to lead build up in the coil which can contaminate the
crankshaft journal holes causing premature wear and possible engine failure.
Oil & filter,
when using unleaded auto fuels
-Inspect for proper oil level at preflight and add as necessary. Renew at 100 hour
intervals of operation. When checking for correct oil level it is best to first start the
engine - especially if it has been sitting for extended periods of time . Once engine has
run for 1 or 2 minutes check for oil level.
Cylinder head to
cylinder mating surfaces -Inspect
for combustion leakage at 25 hour intervals of operation. If present, re-seating of the
cylinder head must be accomplished in accordance with the Rotax service requirements prior
to further operation
Cylinder head
-Re-torque cylinder head bolts after first 50
hours of operation, then at 400 hour intervals of operation - or less if in high cycle
operations such as flight training
Cooling hoses -Inspect at 100 hour intervals of operation. Renew at 500
hour intervals of operation or 48 months, whichever occurs first.
Coolant -Inspect for proper level at preflight and add as
necessary. Flush system and renew annually or at 200 hour intervals of operation. Also
inspect for "JELLING" of antifreeze if this
occurs flush system COMPLETELY and
refill with high quality antifreeze and distilled water. My recommendation is 80%
antifreeze and 20% water.
Radiator cap -Renew at 200 hour intervals of operation or 36 months
Rubber carburetor
manifolds
-Inspect for
cracks/failure PRIOR TO EVERY flight! Renew every 150 hours or 12 months.
Air Filters
-Renew at 50 hour intervals of operation -
For more information on airfilter maintenance refer to...
K &N Airfilter Information
K &N Airfilter Information
Fuel Filter
-Renew at 50 hour intervals of operation
Engine mount bushings -Inspect for wear EVERY flight . Renew YEARLY or 200 hour
intervals of operation whichever comes first.
Exhaust system -Inspect at preflight and at 50 hour intervals of
operation (grab the tailpipes and tug at preflight -
Caution: pipes may be hot!)
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RUNNING MODIFICATIONS ON ROTAX® ENGINE TYPE 912 AND 914 (SERIES) SI-25-1997 |
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LUBRICATION SYSTEM FOR ALL ROTAX® ENGINE TYPE 912 (SERIES), AND 914 (SERIES), SI-912-005, SI-914-007 |
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Valve Spring Retainer Replacement |
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Index for this section. |
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