Briggs has instructions on their site as to how to convert to Magnetron ignition. Copy and paste this link in your browsers address bar.
http://faqs.custhelp.com/cgi-bin/faqs.cfg/php/enduser/std_adp.php?p_faqid=9&p_created=948317400&p_sid=dmORJE4i&p_accessibility=0&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9NiZwX3Byb2RzPSZwX2NhdHM9MCZwX3B2PSZwX2N2PSZwX3NlYXJjaF90eXBlPWFuc3dlcnMuc2VhcmNoX25sJnBfcGFnZT0xJnBfc2VhcmNoX3RleHQ9bWFnbmV0cm9u&p_li=&p_topview=1
Rick
April 2006