EV-97 Eurostar SL Microlight Maintenance Manual GEN/EUR/04 Issue 4 12
horizontally opposed, spark ignition engine and has one central camshaft operating push-rods for
the overhead valves. Cylinders are cooled by a combination of oil and ram air; cylinder heads are
liquid cooled.
The engine has a dry sump with pumped lubrication and a dual breaker less capacitor discharge
ignition system which does not require battery power for its operation. The engine is fitted with an
electric starter, alternator and mechanical fuel pump.
Full technical details of the engine can be found in the Rotax Operator’s Manual. Engine
performance and limitations are summarized below. It should be noted that the aircraft
manufacturer places certain limits on engine operation, lower than those given by the engine
manufacturer:
Full details of the propeller can be found in the propeller manufacturer’s Operator’s Manual.
Engine Model: ROTAX 912 UL
Engine Manufacturer: BRP – Powertrain GMBH
Power
Max Take-off: 59.6 kW / 80 hp at 5800 rpm, max.5 minutes
Max. Continuous: 56 kW / 75 hp at 5200 rpm
Cruising: 53 kW / 71 hp at 4800 rpm
Engine
speed
Max. Take-off: 5800 rpm, max. 5 min.
Max. Continuous: 4800 rpm
Cruising: 4600 rpm
Idling: ~1400 rpm
Cylinder head
temp.
Minimum 60 °C 140 °F
Maximum 120 °C (1) 248 °F
Coolant temp.
Maximum 115 ºC (1) & (2) 239 °F
Oil temp.
Minimum 50 °C 122 °F
Maximum 140 °C 284 °F
Optimum 90 – 110 °C 194 - 230°F
Oil pressure
Maximum 7,0 bar
Minimum 1,5 bar
Fuel: Premium or super unleaded automobile fuel to EN228, minimum RON 90.
AVGAS UL 91 Certified to ASTM D7547
AVGAS 100LL. The higher lead content in AVGAS can result in wear of valve
seats and increased combustion chamber deposits.
Use AVGAS only if other fuels are not available.
For other suitable fuel types, refer to the engine Operator’s Manual.
Fuel Pressure min. 0.15 bar, max. 0.4 bar
Oil: Automotive engine oil of registered brand with gear additives, but not aircraft oil
(refer to engine Operator´s Manual).
API classification SF or SG. (2)
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