If you want a large locking toggle switch: https://www.alliedelec.com/nkk-switches-s6al/70192232/
If you want a 1/4" locking toggle switch: https://www.alliedelec.com/nkk-switches-m2022ll1w01/70192127/
I use the 1/4" locking toggle for ignitions, both master switches and other places.
Note - both are DPDT. I use one side for ignition. On the other side I connect a small buzzer such that the buzzer is connected to power (via a 1/2 amp inline fuse) when the ignition is on. The ground on the buzzer is provided via the alternator light. So, if the engine is not running the buzzer has a ground and it sounds. If the engine is running the buzzer does not have a ground and it is silent.
You can use one buzzer for both ignitions. Here is a simple one from Radio Shack: https://www.radioshack.com/products/radioshack-76db-piezo-buzzer?variant=5717353029
Or from Allied: https://www.alliedelec.com/rs-pro-6173097/70646313/
Carl
Dear Carl,
Thank you for your time. I have found the SPST version of the first switch from DigiKey (I have an account there). Since I have no need for the buzzer (great idea), this switch should do. Can you just confirm this switch would be a good mag switch?
Thank you!!!
I installed a keyswitch from McMaster Carr in series with my master switch toggle so that the starter button can't be engaged by someone climbing into the cockpit and monkeying around. Toggles for the mags and a pushbutton for the starter. Much much cheaper than the Cessna style mag/starter keyswitch and simpler to troubleshoot and install.
Don