the mix for a mac 3 a is 25/1 rotio.
From 1975 when I owned a mac 3 it was fine at 25 to 1 regards
40:1 with high quality 2-stroke oil mix would be fine. http://store.chainsawr.com/
Mac 310 fuel/oil ratio is 40:1
You use two fingers and stroke downward on the mouse pad to scroll down and to go up you stroke upward.
Jackson Mac Low died on December 8, 2004, in New York City, New York, USA of complications from a stroke.
The full ratio according to the embossed diagram on my Mac Cat 435 fuel cap is 40:1. Hope this helps.
McCulloch recommended 40:1 using their oil, 20:1 all other oils. I use 32:1 with good quality 2-stroke oil, has worked fine for years.
Several companies sell outboard tuners to connect to computers Thru the USB Port.
16:1
mac taskmaster might, it works with all obd II computers so it should.
most two stroke engines need a 2% mix but you should look at the manufacturer recomondation.
Most obviously it's James Bond, and Michel Mac-entire :\ :/ :( :) answer your question did it?