New Governor Lever And Clamp With Phillips Head. Left Hand Thread On 4-Stroke Vertical Shaft Engines; Governor/Plate For Primer Carburetor - Tecumseh SPECTRA 37 Service And Repair Manual

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d) NEW GOVERNOR LEVER AND CLAMP WITH
PHILLIPS HEAD. LEFT HAND THREAD ON 4-
STROKE VERTICAL SHAFT ENGINES
Starting from serial No. 3-307 D a new clamp No.
27410096 and a new left hand thread screw No. 2919157
have been introduced.
The engines with left hand thread clamp and screw can
be easily recognised by Phillips cross head (Fig 19).
Old models have clamp and screw with straight cut head.
(Fig 18). Furthermore, new governor lever "A" has 6 holes
instead of 5 as in previous lever. (Fig 19).
Fig 18 - (early type)
A. Lever (5 holes)
B. Clamp
C. R-H thread with straight cut head
Fig 19 - (new type)
A. Lever (6 holes)
B. Clamp
C. L-H thread with Phillips head
e) GOVERNOR/PLATE FOR PRIMER CARBU-
RETTOR
Because of the different configuration on the primer
carburettor, the speed adjustments are made with the
screws on the governor plate. Both speeds (high speed
and idle speed) are under governor plate. (Fig 20).
The screw (A) is for high speed adjustment, the screw
(B) is for idle speed adjustment. Usually the engines are
set at 3000 rpm max speed, and idle at 2000.
NOTE - The screw (C) for the governor lever is a left
hand thread screw. (Fig 21).
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Fig. 18
Fig. 19
Fig. 20
Fig. 21
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