ENGINE SPEED ADJUSTMENT.
This Task Covers:
General mechanic's tool kit, automotive
(Item 15, Appendix G)
Mechanical hand-held tachometer (Item 18,
Engine speed is measured in revolutions per minute (rpm).
Start engine and let it run until warm.
Have an assistant hold a hand-held mechanical tachometer on end of crankshaft (1) on flywheel side of engine.
The rpm reading on tachometer should be 2200±50 rpm. If it is not, loosen two nuts (2) and turn two adjusting
screws (3) to move speed control lever (4), while assistant watches tachometer gage, until correct rpm reading is
reached. Moving speed control lever (4) to the left will decrease engine speed; moving speed control lever (4) to
the right will increase engine speed.
Hold two adjusting screws (3) in place and tighten two nuts (2).
Recheck engine speed by repeating steps b through d.