You can get the key pad from Ranger, just call them with your serial#. I think the're about $300. Don't know if using the kill switch will hurt anything but the start button might stop working. I keep a back up plug-in key switch in my boat just in case. I got it on ebay for $30 or $40 cheap insurance.
225 Yamaha HPDI
LMB 10.00# Ray Roberts May 2006