I have a shower of sparks magneto and after some difficulty in starting, it now just won start. Whats up?
Check the voltage before replacing parts. If you have low voltage at vibrator input you might not get a start. Measure voltage between vibrator terminal marked “in” and ground terminal while operating starter. It must be at least 8 volts on 12 volt system, or 13 volts on 24 volt system. If voltage is acceptable, listen for periodic buzzing of the vibrator during start cycle. If no buzzing is heard, either vibrator is defective or the circuit from the output terminal on the vibrator to the retard contact is open. Check both switch and retard circuit for continuity and good electrical ground. You should hear the vibrator tone change as the magneto breakers open and close. If the tone doesn’t change, check out the wiring to the magneto. Also check the contact springs in the magneto breaker cover to assure solid contact.
