I think the owners handbook says 32:1 with 30# motor oil. but my local marina told me to mix 50:1 with good TC3 oil. I personally mix a Quart of good outboard oil to 5 gallons of gas (about 40:1) with good results for many years.
Howdy.<br /><br />My Johnson Service manual says to use 24:1 mix in the identical Johnson 5.5.<br /><br />BTW, One More Cast, 1 qt to 5 gallons is 20:1.<br /><br />One quart of TC-W3 to 6 gallons gas is 24:1.<br /><br />Good luck.