Tecumseh VLV - Chapter 3 GOVERNORS AND LINKAGE; CENTER FORCE GOVERNOR; TYPE I vs. VLV TYPE II

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Chapter 3
GOVERNORS AND LINKAGE
All Tecumseh 4-cycle engines of recent manufacture
are equipped with mechanical type governors. As the
speed of an engine increases, centrifugal force moves
the weights outward, lifting up the governor spool which
contacts the governor shaft; this in turn closes the
throttle. As engine speed decreases, the weights are
pulled inward by the spring which opens the throttle.
Thus, the engine speed controls the throttle opening
and maintains a certain governed speed.
The governor gear on this engine is driven by the
crankshaft through an idler gear as shown below.
VLV TYPE IITYPE I
TYPE II governors do not use governor retainer clips.
The spool is retained by a raised upset on the shaft.
The governor shaft is pressed into the flange or cover
to a specific dimension as shown below.
NOTE: Gear assembly must have .010 - .020 end play after shaft is
installed into flange.
PRESS
DEPTH
1.319
1.334
IDLER SHAFT
GOVERNOR SHAFT
IDLER GEAR
WASHER
GEAR ASSY.
(GOV.)
SHAFT
SPOOL
SPOOL
IDLER
GEAR
WASHER
GEAR ASSY.
(GOV.)
RETAINING
RING
CENTER FORCE GOVERNOR
UPSET
RETAINER
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