1979 85 hp evinrude gas to oil ratio?

[Jim d]

What is the gas to oil ratio for a 1979 85 hp evinrude outbard boat motor?

[Rick.]

50/1 tcw-3

[Jim d]

Thank you. The person I got the boat from said 40 to 1. I am a little virgin to boating. What is tcw-3?

[Vic.S]

TCW3 is the current spec for a two stroke outboard engine oil. TC = two cycle W= water cooled. 3 is the current spec, the previous one was 2.


Would not hurt to run 40:1 but not necessary

50:1 is near enough 1 pint in 6 gallons

20ml per litre if you are where litres are used. (The rest of the world outside the USA)

[Jim d]

Thank you. I will get a manual.