10. Did the ignition fail on coil or magneto? Try the alternative system by moving the ignition switch on the instrument board, and if that fails the fault is probably in the ignition plugs, distributor or contact breaker.

H. Inspecting the Ignition Plugs.

11. Disconnect the high tension leads from the ignition plugs and remove the plugs with a properly fitting box spanner.
12. If the plug points are dirty or oily, clean carefully with petrol and see that they are properly set so as just to admit the gauge of the special spanner provided.
13. Replace the plugs, renewing washers if necessary.

I. Testing the Distributor.

14. Release the springs U and remove the distributor cover B (without removing the high tension cables A therefrom). Inspect the central carbon brush C to be sure that it moves freely so that it will make contact with revolving distributor arm D.

    Make sure that all the high tension cables are properly connected to the terminal sockets on the distributor cover. Also see that the inside of the cover is clean and dry. If the cover is in order the fault lies on the contact breaker.