Re: How do Atom Computer Ignition modules work?

Home › Forum › Ask A Member › How do Atom Computer Ignition modules work? › Re: How do Atom Computer Ignition modules work?

July 22, 2015 at 5:03 pm #20615
legendre
Participant

    Quick update.

    Good friend loaned me an early 1950s B&S model 5S motor for a test-bed. From what I understand this engine is rated for 1.0 HP @ 3200 RPM. Bore 2.00" / stroke 1.5" / disp. 77cc. Compression seems ok, but haven’t measured it yet. It starts easily and will idle reliably – but it is burning some oil and the plug has coke built up in the cavity. Seems it was the power plant for a mini-bike back when, and it’s definitely well-used.

    Best part, is that it started & ran without trouble using the breadboard version of the BU931 based module. Haven’t had a chance to measure anything yet, all I’ve learned is that the module is definitely phase / polarity sensitive on this motor. Hope to get some timing & RPM measurements later today.