8 hours ago
Hi all,
I have a coil engine (with modern voltage regulator) but using an earlier magneto type SM3 switch panel.
I am having to use the same switch for both the dynamo and ignition coil which seems to work ok. However, if you cut the ignition at fast idle with the dynamo charging, the current just feeds into the coil and keeps running - not great for safety or the dynamo!
What is the best way to both deactivate and isolate the dynamo? Should both the field current and feed to the battery be cut or can you just break the field circuit and rely on the cut-out/regulator diode to prevent current flowing back from the battery?
I'm thinking of adding a relay(s) to allow the ignition switch to isolate multiple but separated circuits which seems like the best solution. Any thoughts? Before anyone suggests just fitting the correct switch panel - I did have one fitted but wanted the early panel with silver ammeter to match the rest of the silver faced instruments on my dash...
I have a coil engine (with modern voltage regulator) but using an earlier magneto type SM3 switch panel.
I am having to use the same switch for both the dynamo and ignition coil which seems to work ok. However, if you cut the ignition at fast idle with the dynamo charging, the current just feeds into the coil and keeps running - not great for safety or the dynamo!
What is the best way to both deactivate and isolate the dynamo? Should both the field current and feed to the battery be cut or can you just break the field circuit and rely on the cut-out/regulator diode to prevent current flowing back from the battery?
I'm thinking of adding a relay(s) to allow the ignition switch to isolate multiple but separated circuits which seems like the best solution. Any thoughts? Before anyone suggests just fitting the correct switch panel - I did have one fitted but wanted the early panel with silver ammeter to match the rest of the silver faced instruments on my dash...