CARBURETOR
2.
Use a tachometer to check engine speed; 2900 ±
300 RPM for DuraForce engines on mowers.
For R tek (piston ported) engines refer to the
specification pages.
Should the governor link (A) be bent or replaced,
adjustment will be necessary. (See Figure 41.)
Figure 39
0720-07
Piston Ported Engine
(R tek Engines Only)
A
The piston ported engine does not use the “click" type
adjustment. For the piston ported engines, the
governor is adjusted by bending the bracket that the
governor spring is attached to. Otherwise, the function
of the governor is the same (see Figure 40).
Figure 41
0893-039
A good starting point is about 1¼” (31.75 mm) from the
casting to the end of the air vane. (See Figure 42.)
Then move the air vane until the throttle is full open.
The air vane must not contact the CD ignition. Should
the governor spring be removed, reinstall with both the
open ends of the spring facing you.
Figure 40
3S-001
(31.75
mm)
Presetting the Governor
(DuraForce Engines Only)
Note: Each “click” of the governor collar represents
approximately 50-75 RPMs.
1.
Turn the collar clockwise to increase spring tension
(and engine RPMs) or counterclockwise to
Figure 42
7.tif
decrease spring tension and RPMs. (See Figure
39.)
Preset the governor collar 3 or 4 clicks
clockwise.
26
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