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? ken-wUS Member - 1 Year (includes $3 online payment fee)Replies: 82Topics: 20 June 18, 2017 at 1:37 pm #59871 I found the the collector tab on the 931 can be placed to ground on the OMC and WICO mags, giving it a great way to transfer the heat away. This gave me only one connection point. I do not have any Mercury’s to try this module on at time. Ken