How to Adjust the Gear Clearance of German Mann Engine Air Pump

Every manufacturer is different, just adjust it according to the instructions. Valve clearance adjustment steps: (1) Remove the intake and exhaust valve cover and magneto housing; (2) Rotate the magneto rotor so that the "T" scribe line on its outer circular surface is aligned with the scribe line on the shell, and the piston should be at the top dead center of the compression stroke at this time; (3) Carefully insert the feeler gauge with the specified valve clearance value into the valve clearance and pull it back and forth. If you feel a little resistance, the clearance is appropriate. (4) If the clearance is not suitable, loosen the adjusting nut, turn the adjusting screw with a small wrench, and pull the feeler gauge to check the clearance. After the clearance is appropriate, tighten the adjusting nut again, and the clearance may change, so use a feeler gauge to retest again.