I have an Eberspacher BN2 auxiliary heater that ran on gasoline that I would like to use in the diesel Syncro, it came out of portable tool kit.
It is really hard to find glow plugs for these units, mine was broken, so I looked on Ebay and found one that I thought I could convert. It is a 12 volt unit compared to the 4 volt original one but in order to make it work I had to install a relais that supplies 12 volt to it.
The relais is triggered by the wire from the original glow plug.
I took the whole heater apart and lubricated the bearings, cleaned the points and checked the combustion chamber.
On the picture it shows it running, I adjusted the fuel pump for the right mixture and ran it all day, also to see if it stopped and started correctly on diesel fuel.
Runs great, I will just use a timer on it, no thermostat.