Special tool for the exact determination of the ignition moment for all types with ignition plug thread M14.
This nut has to be screwed in instead of the ignition plug. The middle pin has to be tightened. The height of the piston can be determined on a scale. The accurateness is better that 1/10mm.
Not suitable for cylinder heads, in which the ignition plug has to be screwed in angularly (ES 250/2, ETS250, TS250/0).
Solid, galvanized version.
