Carburettor Governor System - GGP SV200 Workshop Manual

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GOVERNOR SYSTEM OF THE CARBURETTOR
6.5 GOVERNOR SYSTEM
OF THE CARBURETTOR
GENERAL INFORMATION
The carburettor governor system uses a rod linkage
fitted on a support fixed to the left-hand side of the
engine, completed by a counterweight device, driv-
en by the camshaft, and thus sensitive to changes in
the engine's revolution pattern depending on load.
The force of the counterweights, transferred to the
control lever, tends to shut the main carburettor but-
terfly, in opposition with the spring that would keep
it open; the balance between the spring loading and
the thrust of the counterweights on the control lever
modifies the butterfly opening and adapts the flow
of fuel to the engine so that the revolution speed is
kept constant with engine load changes..
The governor system can malfunction in the follow-
ing ways:
• difficult or failed start or insufficient power (if not
due to other causes):
= Incorrect adjustment of the throttle cable
[u 6.5.A];
= rods bent or deformed
= counterweight device broken or stopped
[u 6.10.B].
• Engine runs irregularly (if not due to other caus-
es):
= Counterweight device broken or stopped
[u 6.10.B].
• Engine exceeds the maximum rev limit (if not
due to other causes):
= Counterweight device broken or stopped
[u 6.10.B].
SERVICING PROCEDURES
A) Adjusting of accelerator cable
1 Loosen the screw (1) of the clamp (2) so that the
cable casing (3) is free to move.
2 Set the throttle control lever to "CHOKE".
3 Move governor control lever (4) forward as far as
possible and, by keeping it in this position, lock
the casing (3) full tightening the screw (1) of the
clamp (2).
© by GLOBAL GARDEN PRODUCTS
SERVICE MANUAL
6.5.
1
[u 6.5.B];
SV200 R200
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