Van's Aircraft RV 12iS, Maintenance Manual

Page: 20 / 222

Rev: 2 Date: 11/15/18
1-12
ENGINE DESCRIPTION
The LSA covered by this manual may be equipped with either a Rotax 912ULS
or a Rotax 912iS power plant. Both are an over-head valve four-stroke, horizontally
opposed four-cylinder. The cylinder heads are liquid cooled. The cylinder barrels are air-
cooled.
The 912 ULS has dual constant depression carburetors to regulate the air/fuel
mixture, and a dual breaker-less, capacitor discharge ignition system to provide the
electrical energy to the spark plugs.
The 912iS has a fully redundant electronic engine management system (EMS)
controlling dual electronic ignition for the sparkplugs, dual electronic fuel injection, and
dual power generation/distribution.
For engine maintenance and inspection requirements and procedures, refer to
the Rotax Engine Type 912ULS or 912iS Series Line Maintenance and Heavy
Maintenance manuals.
ENGINE SPECIFICATIONS
SUMMARY
Make Rotax 912 ULS
Displacement 1352 cc
Ignition Ducati Double CDI
Carburetor Bing
Rated Horsepower 100 Hp @ 5800 RPM
● NOTE: T
HE ENGINE SPECIFICATION INFORMATION IS REFERENCED FROM THE
R
OTAX
912
SERIES
, O
PERATOR
’
S MANUAL
, OM E
DITION
4, R
EV
.0.
SUMMARY
Make Rotax 912 iS Sport
Displacement 1352 cc
Ignition Computer controlled
electronic
Fuel Injection Computer controlled
electronic
Rated Horsepower 100 Hp @ 5800 RPM
● NOTE: T
HE ENGINE SPECIFICATION INFORMATION IS REFERENCED FROM THE
R
OTAX
912
SERIES
, O
PERATOR
’
S MANUAL
, OM E
DITION
1,R
EV
.3.