Just order one of these battery adapters from china and wire it to your starter so you can use your cordless drill's battery pack directly on your 12v starter. They can handle the 18V just fine.
I'm a new member so I'm not allowed to post links or images, but if you go to wish dot com and search for "New 18V Li-ion Batteries Convert to DIY Connection Line Output Adapter For Makita"
Originally Posted by
bluzjamer
Any one figure out how to use a 18 or 19 volt cordless drill to start their Gas Engine?