3. Make sure that the mark on the drive pulley (1) (yellow mark) is situated opposite the "zero" mark of the gauge "S". If necessary, make this mark. 4. Use the table on page 4 to read off, for the type of vehicle in question, the engine speed (column A)and the corresponding total advance in crankshaft degrees (column B). 5. Convert this value into distributor degrees : crankshaft advance 24°