Tank Vent - Stihl MS 341 Shop Manual

5. On MS 341: Set engine's
maximum speed to 13,500 rpm
with the high speed screw (H).
On MS 361: Set engine's
maximum speed to 14,000 rpm
with the high speed screw (H).
6. Install new limiter caps, noting
that the stop lugs on the limiter
caps must line up with the
openings in the carburetor.
Limiter caps that have been
removed once are damaged and
must not be re-used.
84
12.6

Tank Vent

Correct operation of the carburetor
is only possible if atmospheric
pressure and internal fuel tank
pressure are equal at all times. This
is ensured by the tank vent.
In the event of trouble with the
carburetor or the fuel supply
system, always check and clean the
tank vent.
Check function by performing
vacuum test on the tank via the fuel
hose.
– Remove the carburetor –
b 12.2.1
– Drain the fuel tank.
Dispose of fuel properly in
accordance with environmental
requirements.
1
: Connect vacuum pump (1)
0000 850 3501 to fuel hose (2)
and create vacuum in fuel tank.
Equalization of pressure takes
place via the tank vent. There must
be no build-up of vacuum in the
tank. In the event of a malfunction,
install a new tank vent.
– Remove the chain sprocket cover
– b 5.1
– Clean area around the tank vent.
1
: Insert a suitable tool in the slot
(arrow) and pry off the cover (1)
upwards.
1
: Insert a suitable tool in the slot
(arrow) and carefully pry out the
tank vent (1).
MS 341, MS 361, MS 361 C