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Manual Smart M160 / 1– UL- Engine
July 05
Ecofly GmbH page 10
2.6. Cooling System / Coolant
The coolant is a 50:50 mixture of water and antifreeze/anticorrosive fluid.
A 50:50 mixture provides frost protection down to -37°C.
At temperatures as low as -45°C, increase the ratio of the antifreeze
/anticorrosive fluid to 55% but not higher, since otherwise heat drain will be
impeded.
Use only antifreeze/anticorrosive fluids recommended by Mercedes-Benz. For
further information, contact the nearest Mercedes-Benz or smart service station.
In the event of coolant loss, determine cause, correct and refill as necessary. At
the time of refilling, top up with the recommended ratio of water and anti-
freeze/anticorrosive fluid.
Completely replace the coolant every 2 years.
Since coolant temperature is thermostatically controlled, do not cover the cooler
in winter!
2.7. Manifold Intake
Ensure that the air taken in is as cool as possible.
If necessary, take special measures to ensure that air taken in is not
inadvertently preheated by the cooler or the exhaust.
Since carburettor icing cannot occur in this engine by design (being an injection
system) preheated air is not merely superfluous, it actually reduces engine
performance!
If the intake temperature is too high, the ECU will automatically reduce engine
power output, WHICH MAY GIVE RISE TO DANGEROUS SITUATIONS.
Use only suitable air filters. Check, clean or replace the air filter at regular
intervals.
Ensure that all water entering the air intake is drained completely ahead of the
air filter.
Ensure that no rubber particles from the belt drive are sucked in.
Optimum charge air cooling must be ensured whenever the engine is
operational. NEVER cover the intercooler fully or even partially in winter.
2.8. Propeller Gear
The transmission ratio is 2.1 : 1.
Toothed belt: HTD-(Powergrip GT2) 8M; 60mm width.
Check belt tension at regular intervals. When the engine is cold, the belt should
yield 5-10mm when pressed down at the centre of the exposed length.
If necessary, insert washers to adjust the distance of the propeller axle from the
drive shaft.