On Sunday, June 11, 2017 at 1:34:18 PM UTC-5, wrote:
Is there oil port and if so where and it says use premium gas with 50:1

Not on a '73 anything two-stroke that Ive ever seen You're better mixing 30 or 40:1 with an old outboard and use premium fuel. I've seen too many scored chainsaws and weed eaters because someone tried to stretch the limits on 50:1/ even with the finest synthetic lubricants, there's no room for error at that rate. Best to mix thicker to the engines specs, than to read some wild claim of an oil manufacturer.