Lincoln Electric SVM120-A service manual Engine Throttle Adjustment Test, Strobe-tach Method

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F-36 F-36

TROUBLESHOOTING & REPAIR

ENGINE THROTTLE ADJUSTMENT TEST (continued)

FIGURE F.8 – MARK LOCATION, STROBE/TACH METHOD

Flywheel

Chalk mark

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TEST PROCEDURE

This test can be conducted by any one of three methods.

Strobe-tach Method:

1.With the 5/16” nut drivers, remove the sheet metal screws from the right case side.

2.Carefully remove the right case side.

3.Carefully lift the double door assembly to gain access to the engine compartment.

4.With the chalk, mark one of the flywheel bolts. See Figure F.8 for location. Conduct this procedure with the engine OFF.

5.Connect the strobe-tach according to the manufacturer’s instructions.

6.Start the engine and direct the strobe-tach light on the flywheel and synchronize it to the rotating mark.

7.With the machine at HIGH IDLE, the tach should read between 3650 and 3700 RPM. WIth the machine at LOW IDLE, the tach should read between 2150 and 2220 RPM.

8.If any of the readings is incorrect, adjust the throttle as follows.

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RANGER 10-LX