5 motor, in idle position, selector Crank engine several times with starter lever in position so that residues and parking brake applied and soot are ejected. 6 To test each cylinder, press the compression pressure recorder into the spark plug hole of the particular cylinder and, with the throttle valve fully opened, crank engine approx. 8 revolutions. Test all the cylinders in this way. 7 Blow out spark plug recesses with compressed air. Remove any residues on the tapered sealing seat. 01.0904 - 01014