8-6. Adjusting Engine Idle Speed

 

 

 

Y Stop engine and let cool.

 

 

 

Engine idle speed is factory set and

 

 

 

normally should not require adjust-

 

 

 

ment. After tuning engine, check

Engine Speed

 

 

engine speed with tachometer or

(No Load)

 

 

frequency meter. See table for

1850 rpm max

 

 

proper no load speed. If necessary,

 

 

adjust idle speed as follows:

(61.6 Hz)

 

 

Start engine and run until warm.

1250 rpm

 

 

 

 

On CC Models, place Stick/TIG

(41.6 Hz)

 

 

 

 

switch in Stick position.

 

 

 

 

 

 

On CC/CV models, turn Process/

2

5

 

Contactor switch to Stick – Elec-

 

trode Hot position.

 

 

 

 

 

 

1

Solenoid Bracket Screws

 

 

 

2

Throttle Arm

 

 

 

3

Idle Speed Screw

 

 

 

4

Throttle Stop

 

 

 

Loosen bracket screws and move

 

 

 

arm so screw touches stop. Do not

 

 

 

release arm. Turn idle speed screw

 

 

 

to obtain 550 rpm.

 

 

 

5

Idle Mixture Screw

 

 

1

Turn mixture screw counterclock-

 

 

wise until engine falters, then turn

 

 

 

 

 

 

screw clockwise until engine runs

 

 

 

smoothly.

 

 

 

Turn idle speed screw to obtain

 

 

6

1250 rpm.

 

 

6

Solenoid

 

 

 

3

7

 

7

Plunger

 

 

Slide solenoid inside bracket so

 

 

 

 

 

 

plunger bottoms in solenoid. If nec-

 

 

 

essary, shim solenoid/bracket to

 

 

 

prevent linkage from binding. Do

 

 

 

not readjust idle speed screw when

 

 

 

adjusting solenoid.

 

 

 

Tighten bracket screws. Release

 

 

 

throttle arm. Recheck idle speed

4

 

 

and readjust if necessary.

 

 

Y Stop engine.

 

 

 

 

 

 

Close door.

 

 

 

 

Tools Needed:

 

 

 

 

1/4 in

802 731 / Ref. 115 155-A

OM-4405 Page 38

Page 42
Image 42
Miller Electric Big 40 WG manual Adjusting Engine Idle Speed, Engine Speed, No Load

Big 40 WG specifications

The Miller Electric Big 40 WG is a versatile and powerful welding generator designed to meet the demands of professionals in the field. Known for its reliability and robust performance, the Big 40 WG is the ideal choice for those who require both welding capabilities and a portable power source.

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