Operation Manual

7
5.3.1 OIL CHANGE
Use detergent oil for fourstroke engines, class API SG or SF
(indicated on the oil can) with SAE viscosity suitable for the
climate (see table).
To allow the oil to drain out easier, run the engine for about
3÷5 minutes. Then discharge the oil when the engine is still
warm so that the emptying is quicker and more complete via
the drainage hose (pos. 2 fig. 8 and 15) by removing the
drain cap (pos. 8 fig. 8 and 15).
Top up with oil of the recommended type via the filling cap
(pos. 9 fig. 8).
Table 2 shows the amount of oil in the oil pan.
Mod. Liters
2500 0.6
4000 1.1
5500 1.1
TA
B. 2
DANGER
• Warm oil may burn you.
• Running the engine with a poor amount of oil can
seriously damage the engine itself.
• Check the oil level when engine is stopped.
IMPORTANT
Used oils must never be poured on the ground. They shall
be collected and consigned to qualified companies for the
disposal in accordance with any local regulations.
5.3.2 AIR FILTER MAINTENANCE
IMPORTANT
A dirty air filter reduces the air flow to the carburettor. To
keep the carburettor working properly, check it often. Check
more frequently if the engine is used in dusty areas.
DANGER
Never use diesel oil or solvents with a low evaporation point
for cleaning the air filter, since this may lead to danger of
flames or explosion.
Never let the engine run without the air filter. It would get
damaged in a short space of time.
1. Carefully check both cartridges. Replace them if there
are holes or tears
2. Sponge cartridge: wash it with a neutral detergent
so
lution and rinse carefully. Let the cartridge dry
completely, then soak it in clean engine oil and wring out
the excess.
3. Paper cartridge: smoothly beat it several times on a hard
surface to remove any dirt, or blow compressed air
through the filter from inside to out. Do not brush the dirt:
this operation would just push it into the fibres. If the
paper cartridge is too dirty, replace it.
5.3.3 SPARK PLUG MAINTENANCE
RECOMMENDED SPARK PLUG:
Mod. 2500/4000/5500
BP6ES, BPR6ES NGK
W20EPU, W20EPRU ND
Never use a spark plug with a different thermal degree.
1. Remove the spark plug nipple (pos. 1 fig. 8) and use a
suitable wrench to remove the spark plug.
2. Visually check the spark plug. If it is worn or if the
insulator is broken or chipped, replace it. Clean the
spark plug with an iron brush if it is to be used again.
3. Measure the electrode distance by means of a thickness
gauge.
The distance should be 0.70.8 mm.
Adjust, if necessary, by bending the side electrode.
4. Check that the spark plug washer is in good condition
and screw it manually to prevent it being set at an angle.
5. Once mounted, tighten the spark plug using a wrench
with the right driving torque.
-30° -20° -10 ° 0 10 ° 20° 30° 40°
Room Temperature
MULTIGRADE
SG / SF
Hot climates
Cold climates
10W 30
15W 50