prairiemystic
- Joined Jun 5, 2018
- 309
You're right there are no points or electronic module on the Kohler 18HP or any engines around this mid-size. Bigger 22-25HP engines have an ignition advance module. I'm used to small B&S, Lawnboys, motorcycles having points or more.
This means the kill-switch winding is low voltage, don't know how much comes off it. A scope waveform is best or experimenting.
I would try a two transistor tach circuit on the magneto, and set the sensitivity resistor until it works even at low cranking speeds.
Or the 555 timer version also would work OK.
edit: good chance the Kohler "ignition module" that looks like a coil, could have electronics inside for breakerless ignition.
This means the kill-switch winding is low voltage, don't know how much comes off it. A scope waveform is best or experimenting.
I would try a two transistor tach circuit on the magneto, and set the sensitivity resistor until it works even at low cranking speeds.
Or the 555 timer version also would work OK.
edit: good chance the Kohler "ignition module" that looks like a coil, could have electronics inside for breakerless ignition.
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