DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: --
CHAPTER-
PAGE 3-12
MAINTENANCE MANUAL STEMME S12
• In the liquid cooling system, the combined function of the expansion reservoir and refill
container was split up in two separate containers, with the expansion reservoir located
above the engine and the refill container on the left side of the fire-wall.
• The ignition unit is installed above of the engine slightly behind the original ROTAX-position.
• The throttle levers on the carburetors have been slightly modified (modification does not
affect the throttle rigging of the original engine) and additional springs have been installed
(pulling towards full-power position) to compensate for friction due to the long control
cables between cockpit and engine bay.
Engine performance data of the ROTAX 914 F2/S1 are identical to those of the ROTAX 914 F.
ENGINE PERFORMANCE DATA
Max. T/O power.
84.5 kW at 5800 RPM
113.2 hp
Max. continuous power.
73.4 kW at 5500 RPM
98.4 hp
Engine reduction gear ratio
i = 2.4286
Max. propeller
2650 RPM
3.4.2
LUBRICATION SYSTEM
SYSTEM DESCRIPTION
Refer to »Maintenance Manual (Heavy Maintenance) for ROTAX Engine Types ROTAX 912 and 914
Series«, section 79.
The ROTAX 914 is equipped with a dry-sump pressure lubrication system. The pumps are part of
the engine. It was necessary to modify the routing of the oil pipes between oil pump and turbo-
charger. Oil is returned from the crankcase to the oil tank by compression blow-by pressure, and
from the turbocharger via the secondary oil pump (scavenge pump).
The oil tank is standard from ROTAX. It is installed behind the fire-wall on the LH side of the
fuselage frame. The oil filler cap is below a service access in the upper center fuselage fairing.
Oil is taken in flexible pipes from the oil tank through the fire wall to the engine bay. Any flexible
oil lines in the engine compartment are shrouded by fire protective sleeves.
The oil cooler is installed on the RH side of the fuselage frame and supplied with air from the RH
cowl flap.
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