Release 00 - 11/2018
page 28
Engine WBE 170
Workshop Manual
10. GOVERNOR SYSTEM OF THE CARBURETTOR
General information
The carburettor governor system uses a engine shaft linkage tted on a support xed 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-
y, 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 modies the buttery opening and adapts the ow of fuel
to the engine so that the revolution speed is kept constant with engine load changes.
See the relevant section [
17] for advice on resolving problems related to the governor system.
MODE
SET
1
2
4
3
10.1. Adjusting speed
1 -
Check the rotation speed on the speed
indicator (1).
2 - Using pliers, bend the plate (2) slightly to the
right to increase the number of revs and to the left
to reduce them.
NOTE: The engine speed must be between
2900(±100)r.p.m.;ifthisvalueisnotfound,
proceed as indicated.
3 - Check:
- to facilitate the inspection, remove the cover and
lter unit;
- that the spring (3) is intact and that it is properly
positioned in its seat;
- that the tie rod (4) is intact and not deformed;
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