turbofiat124
Well-Known Member
- Joined
- Mar 23, 2011
- Threads
- 83
- Messages
- 288
I've always wondered how these systems work:
http://vkakarting.com/replacing-points-with-ignition-module/
So when the points close, the - post on the coil becomes grounded and discharges the stored energy through the coil wire to the spark plug. So when using this module, how does it know when to fire the coil?
I know how magnetic triggered electronic ignitions work (like GM HEI). A magnetic star (or magnet itself, example Petronix Ignitor) passes by a transistor than turns on and off. But with this device, you just snip the wire going to the points and connect it to the coil.
According to the article, it says to verify the timing and adjust the coil accordingly? I never really put much thought into it but I always thought the timing was fixed on most if not all small 1 cylinder engines.
I installed one of these on an old B&S engine with points I was having a tough time getting started but can't remember if it worked or not. Seems like it did but the engine had other issues. That was 25+ years ago. I ended up pulling the engine off the mower and replacing it with a larger displacement engine with electronic ignition. So I can't remember. It's still in my parent's barn.
http://vkakarting.com/replacing-points-with-ignition-module/
So when the points close, the - post on the coil becomes grounded and discharges the stored energy through the coil wire to the spark plug. So when using this module, how does it know when to fire the coil?
I know how magnetic triggered electronic ignitions work (like GM HEI). A magnetic star (or magnet itself, example Petronix Ignitor) passes by a transistor than turns on and off. But with this device, you just snip the wire going to the points and connect it to the coil.
According to the article, it says to verify the timing and adjust the coil accordingly? I never really put much thought into it but I always thought the timing was fixed on most if not all small 1 cylinder engines.
I installed one of these on an old B&S engine with points I was having a tough time getting started but can't remember if it worked or not. Seems like it did but the engine had other issues. That was 25+ years ago. I ended up pulling the engine off the mower and replacing it with a larger displacement engine with electronic ignition. So I can't remember. It's still in my parent's barn.