C. Making Engine Speed Adjustments

2450 ± 100 rpm

Idle

3750 Max

Weld/Power

Be sure throttle link is parallel with throttle lever.

67

1

2

4

5

Do not twist

3 solenoid boot while adjusting engine speed.

Tools Needed:

3/8, 7/16 in 10, 14 mm

.Before adjusting engine speed, verify throttle solenoid is installed properly (see Section B on previous page).

Check engine speeds with a tachometer (see table). If necessary, adjust speeds as follows:

Start engine and run until warm. Turn A/V control to max.

Adjusting Idle Speed

Turn Engine Control switch to Run/Idle position.

1Throttle Solenoid

2Idle Speed Jam Nut

3Plunger

4Throttle Link

5Throttle Lever

Loosen jam nut. While holding throttle link with a 3/8 in wrench, turn plunger clock- wise to increase idle speed or counter- clockwise to decrease idle speed.

.After adjusting idle speed, verify the throttle link is parallel with the throttle lever. If necessary, loosen the idle speed jam nut and reposition the throttle link.

.Do not twist solenoid boot while ad- justing engine speed.

Tighten jam nut.

Adjusting Weld/Power Speed

Start engine and run until warm. Turn A/V control to max.

6Weld Speed Jam Nut

7Adjustment Screw

Turn Engine Control switch to Run posi- tion. Loosen nut and turn screw counter- clockwise to increase speed. Turn screw clockwise to decrease speed. Tighten nut.

Ref. ST-801 961 / ST-801 963

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Hobart Welding Products OM-487 manual Making Engine Speed Adjustments, Adjusting Idle Speed, Adjusting Weld/Power Speed