Fuel; Preparing The Mix - GEISMAR STUMEC MTZ 350S Manual

3.2 Fuel

3.2.1 Preparing the mix

The two-stroke engine on the rail-cutting machine runs on a petrol and motor oil mix. The quality of these elements and the mix ratio have a decisive
influence on the way the engine runs and the length of its service life.
• Petrol
Only use unleaded petrol with an octane level of at least 90 RON.
DIESEL, METHANOL, ETHANOL and ALCOHOL are NOT TO BE USED
• Motor oil
Only use good-quality oil intended for air-cooled two-stroke engines. Preferably, STIHL 2-stroke oil should be used. It is specially designed
for STIHL engines and guarantees the longest possible service life. Do not use oil designed for water-cooled engines, or oil for 4-stroke engines.
• Preparing the mix
Always make the mix in a clean recipient approved
for the fuel used.
➊ Start by pouring in half the petrol to be mixed
➋ Pour in all the oil.
➌ Mix by shaking the recipient.
➍ Pour in the remaining petrol.
➎ Mix the fuel together again before filling the machine tank.
• Storing the mix
Mixes made of unleaded petrol do not remain stable for a long time. So, they must NOT be prepared in advance, but as and when
required.
3.2
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Proportions:
- STIHL oil for two-stroke engines
1:50 = 1 volume of oil + 50 volumes of petrol.
- Other good quality oil for two-stroke engines
1:25 = 1 volume of oil + 25 volumes of petrol.
Petrol
1
5
10
15
20
25
MTZ_Gb_00294_070525.doc
STIHL two- Other quality
stroke oil two-stroke oils
1:50 (2%) 1:25 (4%)
0,02 0,04
0,10 0,20
0,20 0,40
0,30 0,60
0,40 0,80
0,50 1,00
Unit = liters
3.2