Lincoln Electric COMMANDER 400 SVM133-B Service Manual page 92

F-38
ENGINE THROTTLE ADJUSTMENT TEST (continued)
FIGURE F.10 - BLOWER PADDLE MARKED FOR STROBE-TACH METHOD
MARK BLOWER
PADDLE HERE
TEST PROCEDURE
Strobe Tach Method
1. Conduct this procedure with the engine OFF.
2. Unlatch, lift and secure the right side engine
service access door. Perform Case Cover
Removal and Replacement Procedure
through Step 11. (For Strobe-Tach method
only.)
3. With a white or red marking pencil, place a
mark on one of the blower paddles. See
Figure F.10 for location.
4. Connect the strobe-tach according to the
manufacturer's instructions.
TROUBLESHOOTING & REPAIR
COMMANDER 400
5. Start the engine and direct the strobe-tach
light on the blower paddle. Synchronize it to
the rotating mark.
With the machine at HIGH IDLE the tach
should read between 1890 and 1915 RPM.
With the machine at LOW IDLE the tach
should read between 1325 and 1400 RPM.
F-38