Cub Cadet SLT1554, SLT1550, SLT1550, SLT1554 manual Adjustment, Lean Adjust to Midpoint Rich

Adjustment

NOTE: Engines may have a fixed idle or limiter cap on the idle fuel adjusting screw. Step 2 can only be performed within the limits allowed by the cap.

1.Start the engine and run at half throttle for five to 10 minutes to warm up. The engine must be warm before performing steps 2 and 3.

2.Low Idle Fuel Screw Setting: Place the throttle into the “idle” or “slow” position. Turn the low idle fuel mixture screw out (counterclockwise) from the preliminary setting until engine speed decreases (rich). Note the position of the screw. Now turn the mixture screw in (clockwise). The engine speed may increase, then it will decrease as the screw is turned in (lean). Note the position of the screw. Set the adjusting screw midway between the rich and lean settings. See Figure 17

3.Low Idle Speed Setting: Place the throttle control into the “idle” or “slow” position. Set the low idle speed to 1200 RPM (± 75 RPM) by turning the low idle speed adjusting screw in or out. Check the speed using a tachometer

Lean

Adjust to Midpoint

Rich

Figure 17

NOTE: To ensure best results when setting the low idle fuel Screw, the low idle speed must not exceed 1200 RPM (± 75 RPM) .

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