Can I use a pre-mix in my Johnson 120?

[whipstrut]

I have a 1993 Johnson 120 and last year the alarms started going off. I realize that it could be the oil injection or cooling system causing the alarm.
If after some diagnosis work it turns out to be a VRO problem, is it OK to run this engine on a 50:1 premix? If so, what has to be disabled to allow us to use the boat? At this time of year, I don't think my mechanic can get to it in a reasonable time, so this would be just until he can get it it his shop for a complete test session. Just to clarify, I think this motor is the wide angle V and I think they call it a "looper".

Thanks, you've always been very helpful in the past!

 

[tashasdaddy]

Re: Can I use a pre-mix in my Johnson 120?

VRO conversion w/ pump still working

if the fuel side on your Pump is still working it is very simple. unplug the 2 line harness going to the oil tank, unplug the 3 or 4 wire harness, going to the Vro pump. cut and cap the oil line going into the motor. add oil to fuel tank, mix well, then remove fuel line at top carb, catching gas in a container, pump the fuel line bulb until you get premixed gas to the carb. you can tell as it will change color. put line back on carb, and go boating.

 

[whipstrut]

Re: Can I use a pre-mix in my Johnson 120?

Thanks for the instructions, and I'm going to assume that 50:1 using Evinrude 2 stroke oil is the correct mixture.

 

[kenmyfam]

Re: Can I use a pre-mix in my Johnson 120?

Any TCW-3 2 stroke oil is good. There are many opinions on which one is the best.