1985 Johnson 6hp gas oil mix ratio?

[M.D. Holloway]

I'm thinking 40:1, any idea where I can find out?

[Jrboulder]

I've been told 50:1 for johnson's made after 1966

[rfuerst911sc]

For my 1987 30 Johnson the factory originally stated 100:1 but apparently they had some engines go boom so 50:1 is now recommended. I would go 50:1 should work just fine.

[Joe Ricard]

You can not have too much oil. We have some race karts that like 16:1, My shifter ran best 30:1 and my Rotax practices @ 40:1 and races 50:1

[oldE]

Originally Posted by Joe Ricard

You can not have too much oil. We have some race karts that like 16:1, My shifter ran best 30:1 and my Rotax practices @ 40:1 and races 50:1

I think I would caution on this one:
Too much oil raises the viscosity of the fuel mixture, lowering the flow rate through the jet and can lead to a lean mixture. Under load, you might not like the results.

Best
Les

[mikesride]

1964 and up 50:1 is what I recall, somebody else said 66 and up......either way your a little after that!!!!!!

[Bill Douglas]

Originally Posted by oldE

I think I would caution on this one:
Too much oil raises the viscosity of the fuel mixture, lowering the flow rate through the jet and can lead to a lean mixture. Under load, you might not like the results.

Best
Les

Thanks for the info Les. I have been running my chainsaw and weedeater at 35:1 instead of the recommended 50:1 thinking a little more oil is good for it.

[mikesride]

Wait...... I thought you were lubemaster???????

[drcoastline]

Originally Posted by LubeMaster77

I'm thinking 40:1, any idea where I can find out?

I think you are correct but going 50:1 won't hurt. It may foul your plugs after a while but that's about it.

[M.D. Holloway]

How do you think we learn? We ask and then the results present and get filed away for future reference