Oregon PN2500N Mode D'emploi page 69

Note: Use an anti-oxidant added quality oil expressly labelled for air-cooled
2-stroke engine use. The recommended mixing ratio for petrol: oil is 40:1.
Never mix fuel and oil directly in the tank of the chain saw.
1) Mix the fuel (fig.15)
a) Place the fuel mixture container on even and steady surface.
b) First fill the gasoline to the scale marked gas.
c) Then fill the 2-stroke engine oil until the scale marked oil.
d) Shake the container gently, then fill into the fuel tank.
2) Place the chain saw on a stable, level surface with the fuel tank cap
facing upward.
3) Unscrew and remove the fuel tank cap.
4) Fill correctly mixed fuel into the fuel tank (Fig.16). Do not overfill and
leave approximately 5 mm of space between the top of the fuel and the
inside edge of the tank to allow for expansion. (Fig.17)
Note: Fuel and oil deteriorate over time. It may be difficult to start the engine
if you use fuel which has been kept for more than 30 days.
Towards the end of the season, it is advisable to put only as much fuel in the
tank as you need for each use, since it should be completely used up before
storing the chain saw. Empty remaining fuel from the tank when storing the
chain saw for over 30 days.
5) Wipe up spilled fuel with a soft cloth and refit the fuel tank cap.
GB
Fig.15
Fig.16
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Fig. 17