Fuel And Lubrication - Bavaria BPC 2250 Mode D'emploi

8. Install the bar cover (A).
Important! The bolt (E) on the chain tensioning
mechanism must snap into place in the hole (G)
in the guide rail. (Fig. 2G)
To ensure that happens, slide the guide rail (2)
forwards and backwards slightly when you mount
the bar cover (A). Hand tighten the nut (19).
5.2 Adjusting the chain tension (3A/3B)
Before adjusting the chain tension, make sure
that the engine is switched off .
1. Push the tip of the guide rail (2) upwards
slightly and adjust the chain tension using
the chain tensioning screw (20). (Fig. 3A) The
chain is set to the optimal tension when the
chain (3) on the underside at the middle of
the guide rail (2) is as shown in Fig. 3B (B).
2. Tighten the nut (19) while applying slight
pressure to the tip of the bar.
3. Carry out a functional check. Pull the chain
(3) by hand once all the way around the guide
rail (2). If the chain (3) is hard to pull around
the guide rail (2) or if it jams, the tension is too
tight.
If that is the case, make the following slight ad-
justment:
1. Loosen the nut (19) and hand tighten it again.
2. Reduce the chain tension by turning the chain
tensioning screw (20) counterclockwise. Only
make small adjustments at a time and always
pull the chain (3) backwards and forwards
on the guide rail (2) to see if the chain moves
smoothly (3) but still fi ts tightly.
Note: If the chain (3) is too loose, turn the
chain tensioning screw (20) clockwise.
3. If the chain tension is adjusted to the optimal
setting, tighten the nut (19) while applying
slight pressure to the tip of the bar.
A new saw chain will stretch, so it is impor-
tant to readjust the chain at short intervals
(around 5 cuts) when you fi rst start using it.
The intervals get longer as operating time
increases.
Note: If the saw chain (3) is TOO LOOSE or TOO
TAUT, the drive wheel, chain bar, chain and crank
shaft bearing will suff er premature wear. Fig. 3B
shows the correct tension A (when cold) and ten-
sion B (when warm). Fig. C shows a chain that is
too loose.
Anl_BPC_2250_SPK7.indb 24 Anl_BPC_2250_SPK7.indb 24
GB

5.3 Fuel and lubrication

Fuel
Use regular grade unleaded gasoline mixed with
1:40 custom 2-cycle engine oil for best results.
Mixing fuel
Mix fuel with 2 cycle oil in an approved container.
Shake container to ensure thorough mix.
Note: Never use straight gasoline in your unit.
This will cause permanent engine damage and
void the manufacturer's warranty for that product.
Never use a fuel mixture that has been stored for
over 90 days.
Note: If 2-cycle lubricant is to be used, it must be
a premium grade oil for 2-cycle air cooled engi-
nes mixed at a 1:40 ratio. Do not use any 2-cycle
oil product with a recommended mixing ratio of
1:100. If insuffi cient lubrication is the cause of en-
gine damage, it voids the manufacturer's engine
warranty for that occurrence.
Recommended fuels
Some conventional gasolines are being blended
with oxygenates such as alcohol or an ether com-
pound to meet clean air standards. Your engine is
designed to operate satisfactorily on any gasoline
intended for automotive use including oxygenated
gasolines. It is recommended to use unleaded
petrol as fuel.
Lubrication of chain and chain bar
Whenever you refi ll the fuel tank with petrol you
must also top up the level of chain oil in the chain
oil tank. It is recommended to use standard chain
oil.
Engine oil and gasoline
Gasoline and Oil Mix 1:40
Engine pre-start checks
Danger: Never start or operate the saw unless
the bar and chain are properly installed.
1. Fill the fuel tank (A) with correct fuel mixture
(Fig. 4).
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I Saw chain
I Oil Only
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