Refuelling; Topping Up The Oil; Cleaning The Machine And The Engine; Nuts And Bolts - ST BC 25 H Manual De Instrucciones

7.2.1 Petrol characteristics
Only use unleaded petrol with an
octane rating of at least 90.
IMPORTANT Unleaded petrol tends to
create deposits in the container if stored for
more than 2 months. Always use fresh petrol!
7.2.2 Oil characteristics
Only use top quality oil specifically for four-stroke
engines, highly detergent, with classification
SF-SG and viscosity SAE 10W30.
IMPORTANT The use of a non-detergent
or inadequate oil or one with different features
to those indicated will damage the engine
and will cause invalidation of the warranty
Your Dealer can provide you with oils which
have been specifically developed for this
type of engine, and which are capable of
guaranteeing a high level of protection and
extend the efficiency of the engine.

7.3 REFUELLING

Before refuelling:
1. Place the machine on a flat stable
surface, with the fuel tank cap
facing upwards (Fig. 12.G).
NOTE On the fuel tank (Fig.
11.G) there is the following symbol:
Tank
2. Clean the fuel tank cap and the
surrounding area to prevent any dirt from
entering the tank during refuelling.
3. Open the fuel tank cap carefully to allow
the pressure inside to decrease gradually.
4. Use a funnel to refill and avoid
filling the tank to the brim.

7.4 TOPPING UP THE OIL

IMPORTANT Do not start the engine and
do not use the machine if the oil level is low.
To check the oil level:
1. Place the machine on a flat stable
surface, with the fuel tank cap
facing upwards (Fig. 21).
2. Unscrew the tank cap and check that the
oil level reaches the rim of the filler.
7.5 CLEANING THE MACHINE
AND THE ENGINE
Always clean the machine after use.
To reduce fire hazards:
– keep the machine and, in particular,
the engine free of grass, leaves,
or excessive grease;
– periodically clean the cylinder fins
with compressed air and clear the
silencer area to get rid of sawdust,
branches, leaves or other debris.
To avoid overheating and damage to the
engine, always keep the cooling air vents
clean and free of sawdust and debris.

7.6 NUTS AND BOLTS

• Keep all nuts, bolts and screws tight to be sure
the equipment is in safe working condition.
• Check regularly that the
handles are fixed firmly.

8. OCCASIONAL MAINTENANCE

8.1 ANGLE TRANSMISSION LUBRICATION

Lubricate with lithium-based grease.
Remove the screw (Fig. 22.A) and put in the
grease, turning the shaft manually until grease
emerges, then replace the screw (Fig. 22.A).

8.2 CLEANING THE AIR FILTER

IMPORTANT Cleaning the air filter is
essential to guarantee the efficiency and
durability of the machine. Do not work with
a damaged filter or without a filter, as this
could permanently damage the engine.
Clean the filter as follows:
Type I
1. Press the tab (Fig. 23.A) and remove
the cover (Fig. 23.B) and then the
filtering element (Fig. 23.C).
2. Wash the filtering element (Fig.
23.C) with soap and water Do not
use petrol or other solvents.
3. Leave the filter to dry in the open air.
4. Replace the filtering element (Fig.
23.C) and the cover (Fig. 23.B).
EN - 13