Fuel - Vittorazi Motors COSMOS 300 User Manual

4.2 Fuel

Cosmos 300 engine requires a mixture of gasoline and oil to operate. Choose an open, ventilated,
clean location away from dust, sand, grass and any foreign bodies that may come into contact
with the mixture. If possible while refuelling, filter the mixture. Make sure that the fuel tank, filter
and funnel, are always perfectly clean.
Gasoline is extremely flammable and explosive. Never fill the tank of your engine when it is
running and do not prepare the mixture of petrol and oil near possible sources of ignition.
Vittorazi engines are approved with fuel that complies with the EU regulation UNI EN 228.
Fuel 95 RON contain a maximum percentage of ethanol of 5 % in volume. The company has
tested the wear limits of the mechanical parts with this fuel and the maintenance program
is calibrated on this basis. Membranes, rubbers and carburettor seals can tolerate a
maximum percentage of alcohol typical of European gasoline: 5 % ethanol, 3 % methanol
and 10 % MTBE octane enhancer.
The use of inappropriate fuels (with higher Ethanol percentages and / or with lower RON)
makes the engines leaner, up to overheating and breaking, thus bringing the user in serious
danger. The use of unsuitable fuels also creates serious problems of corrosion and
degradation of the engine materials. For these reasons, the use of different fuels that doesn't
meet the required standards, leads to the voiding of the product warranty. When the
available petrol doesn't meet the required standards, we recommend the use of AVGAS
100LL (Aviation Gasoline, 100 RON, Low Lead) in order to prevent any engine damage.
Continuous use of AVGAS 100LL does not affect the engine warranty.
The oil we recommend is Motul710 or Motul800, successfully tested in our engines. We have
been running all approval tests for years with both of these oils.
•
The Motul710 is suggested for infrequent use, cross and discovery flights, with
moderate and short climbs to max revolutions.
• The Motul800 is suggested for frequent use, tandem, freestyle, competition, sportive
and extreme use.
Avoid mixtures prepared at the petrol station. A mixture prepared 2-4 weeks earlier and left
in a tank may separate (oil and petrol), losing its lubrication characteristics even if mixed
before use.
Cosmos 300 – User manual – V3 17