Release 00 - 03/2018
Engine TRE 224
page 25
Workshop Manual
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9. GOVERNOR SYSTEM OF THE CARBURETTOR
General information
The carburettor governor system uses a engine shaft linkage fitted on a support fixed to the left-hand side of
the engine, completed by a counterweight device, driven 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 butter-
fly, 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.
See the relevant section
for advice on resolving problems related to the governor system.
9.1. 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 (4) to “FAST”.
3 - Move governor control lever (5) 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).
2
1
3
4
5
1
3
2
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