71
10
6. Assemble governor spring (A, Figure 22) to
governor control lever (B).
NOTE: Governor spring must be installed in correct
hole in governor control lever by engine model.
• Model 430400 - Top Hole
• Model 580400 - Bottom Hole
Figure 22
Initial Carburetor Adjustment
1. Turn idle mixture screw clockwise until it just
seats. DO NOT FORCE. Turn screw counter-
clockwise 1/2 turn (Figure 23). This setting
will permit engine to start.
NOTE: Final adjustment will be made with engine
running.
Figure 23
Final Carburetor Adjustment
NOTICE: All carburetor adjustments must be made
with the air cleaner installed.
1. Start and run engine at low speed for
approximately five minutes. Or, if equipped
with a temperature gauge, until needle
moves from C or COLD position.
2. With control lever on equipment in SLOW
position, hold throttle lever (A, Figure 24)
against idle speed screw and adjust idle
speed to 1200 RPM.
Figure 24
3. SLOWLY turn idle mixture screw clockwise
until engine speed just starts to slow (lean
mixture).
4. Then SLOWLY turn idle mixture screw
counter-clockwise until engine speed just
starts to slow (rich mixture).
5. Turn idle mixture screw (A, Figure 25) to mid
point between rich and lean.
Figure 25
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