Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 3-29
Amendment Nr. 0
Date: --
A4011121_B23.doc
Doc. No. A40-11-121
3.4.14 Operating Media
3.4.14.1 Fuel
It is recommended to use premium gasoline, unleaded, minimum RON 95. Suitable fuels:
EN 228 Super
EN 228 Super plus
According DOT: gasoline min. grade 1, AKI 90.0, acc. to Canadian General Standard Board
CAN/CGBS-3.5 (Unleaded Automotive Gasoline)
According FAA: Standard Specification for Automotive Spark-Ignition Engine Fuel, ASTM D 4814
AVGAS 100LL.
When using AVGAS 100LL, valve seats are stressed by the high amount of lead and in addition combustion
chambers will accumulate residues. Because of this, only in case of fuel vapour problems or if other fuel is
not available, AVGAS should be used.
CAUTION:
The engine manufacturer recommends, not to use AVGAS for an extended period, because an
increased amount of residues may accumulate in the engine.
CAUTION:
Danger of fuel vapour lock when using "winter"-fuel during summer time.
CAUTION:
Use only the appropriate fuel, which is recommended for the climate zone
3.4.14.2 Coolant
Mixture of 80% concentrated antifreezing agent with anticorrosion additives and 20% water. Freezing point of
this mixture is about -38°C / -34°F. "BASF Glysantin Antikorrosion" proved to be good. This or equivalent
coolant should be used.
CAUTION:
To minimise the risk of residues, concentrated antifreezing agent without water added should only
be used in case of coolant evaporation after engine shut-down. Pure antifreezing agent starts
freezing at -18°C / 0°F.
CAUTION:
Check of the coolant level: The quantity in the overflow container (lower left side in the wheel bay)
must show to be between "min" and "max" markings. Missing coolant in the overflow container
must be added.
CAUTION:
If the level of coolant in the overflow container is below "min" marking, the proper supply of the
breather valve is not guaranteed. In this case, make sure that there is no air in the cooling
system. This is checked by opening the locking cap on the refill reservoir (left side on fire-wall),
add coolant if necessary.
WARNING:
Do not open the locking cap on the refill reservoir as long as the engine is not cooled down. The
coolant system is pressurised: Danger of burning by hot spraying fluid.
NOTE:
If the engine is warm, the indicated quantity in the overflow container is noticeably higher. If the fluid
quantity is too high, this means no danger to the system, but coolant overflows from the overflow
container into the gear bay.
