Section
4-28 LX 31/41 Work Platform
Maintenance
4.14 Engine Adjustments
Use the following procedures to set engine speeds for
gasoline, propane, and diesel engines. For complete
service information on Kubota engines, consult the
Kubota Work Shop Manual for your engine.
GASOLINE ENGINE
Idle Speed (Figure 4-27)
1. Warm up the engine for 20 minutes and shut off.
2. Tighten the pilot screw of the carburetor completely,
then loosen 1 to 1
1
/2 turns. Do not overtighten the
pilot screw.
3. Start the engine. Release the throttle switch if it is
engaged.
4. Back off on the throttle stop screw until the engine is
barely running.
5. Adjust the pilot screw to achieve maximum RPM.
6. Adjust throttle stop screw until engine RPM reaches
1350
+
/- 50.
Figure 4-29: Diesel Engine
DIESEL ENGINE
Idle Speed (Figure 4-29)
1. Warm up the engine for 20 minutes.
2. Depress the throttle button to put the engine in high speed.
2. Adjust the idle stop screw until the RPM reaches
1350
+
/- 50.
3. Apply one drop of sealant to protect the adjustment
from vibration.
High Speed (Figure 4-29)
1. Warm up the engine for 20 minutes.
2. Depress the throttle button to put the engine in high speed.
2. Adjust the high speed screw until the RPM reaches
3000
+
/- 50.
3. Apply one drop of sealant to protect the adjustment
from vibration.
Figure 4-27: Gasoline Engine Carburetor
Choke Lever
Throttle Lever
Pilot Screw
Throttle Stop Screw
Governed High Speed (Figure 4-28)
1. Loosen the locknut on the governor lever.
2. While pushing the throttle fully open with the
governor lever, turn the governor shaft fully clock-
wise with a screwdriver.
3. Tighten the locknut in this position.
4. Start the engine and depress the throttle button.
5. Adjust the high speed adjustment screw until the
RPM reaches 3400
+
/- 50.
High Speed Adjustment Screw
Throttle Solenoid
Governor Shaft
Governor Lever
Governor Spring
Locknut
Idle Stop Screw
Throttle Solenoid
High Speed Screw
4.14
Figure 4-28: Gasoline Engine Governor
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