B) Adjusting maximum speed
11 Check that the throttle cable is correctly adjust-
ed [ point “A”
].
12 Let the engine heat up for a few minutes then
set the throttle control to “FAST”. Check the
rotation speed on the speed indicator (21).
NOTE
The engine’s maximum speed must be between
2800 and 3000 rpm; if you do not read this
value, proceed as follows.
13 Check:
– that the spring (22) is intact and that the
spring hook wire (23) is not bent and replace
them if necessary;
– that the levers are not bent or deformed and
replace the entire support if necessary [
point “C”
];
– that the fin disc (24) of the pneumatic device
is not broken and moves freely. If the fin disc
is even partly broken, replace it [ point
“D”
];
14 If the above checks do not reveal faults, a dif-
ference between the measured speed and
specified speed can be compensated by bend-
ing the spring hook clip (25):
– inwards to reduce the rpm:
– outwards to increase the rpm.
15 If you fail to reach the specified values, adjust
the position of the fin disc (24) in relation to the
flywheel by tightening or loosening the central
ring on the tie rod (26) to increase or decrease
the centre distance between the terminals.
C) Replacing the lever system support
21 Remove the conveyor with the tank [ 6.1.A
].
22 Remove the air filter cover (31) and the filtering
SV 150
6.5.0
GOVERNOR SYSTEM OF THE CARBURETTOR
2 / 3
WORKSHOP MANUAL
page
from
2004 to ••••
01/2005
21
26
26
25
24
22
24
23
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