100:1 or 50:1?

[Knotstrait]

Hi, I have a 1989 6hp Johnson, on the motor has a sign says 100/1, is that means 100:1?
thank you!

 

[kbait]

Omc officially changed those back to 50/1

 

[Knotstrait]

Oops, I ran it with 100:1 in the bucket for about 5-10 minutes after I cleaned the carb, it ran very smooth, idle very well, but 3 hours later, I took it to the marine, it wouldn’t start, did I killed it?

 

[racerone]

The 100:1 mix was a factory blunder / mistake .----Do a compression test on it.--Post the numbers.--Make sure lanyard clip is installed and working properly.----Run at 50:1 on it now.

 

[Knotstrait]

The 100:1 mix was a factory blunder / mistake .----Do a compression test on it.--Post the numbers.--Make sure lanyard clip is installed and working properly.----Run at 50:1 on it now.

Thank you, I will try it!

 

[Knotstrait]

The 100:1 mix was a factory blunder / mistake .----Do a compression test on it.--Post the numbers.--Make sure lanyard clip is installed and working properly.----Run at 50:1 on it now.

I did the test, both cylinders are about 68
The motor ran perfectly after I clean the carb yesterday, it started 2nd pull, I was really excited, ran about 5-8 minutes, put it forward and reverse twice and ran the carb dry, took it to the marine, and it wouldn’t start. And lost the knob, more than frustration,

 

[saltchuckmatt]

I did the test, both cylinders are about 68
The motor ran perfectly after I clean the carb yesterday, it started 2nd pull, I was really excited, ran about 5-8 minutes, put it forward and reverse twice and ran the carb dry, took it to the marine, and it wouldn’t start. And lost the knob, more than frustration,

Most likely you didn't kill it running 100 to 1 for that short of time and at low speed but maybe someone before you if they ran it at WOT for any length of time. What knob by the way? 68 is not good so you may want to retest with another tester. Not sure why it's running at home and not while your away.

 

[Knotstrait]

I did the test, both cylinders are about 68
The motor ran perfectly after I clean the carb yesterday, it started 2nd pull, I was really excited, ran about 5-8 minutes, put it forward and reverse twice and ran the carb dry, took it to the marine, and it wouldn’t start. And lost the knob, more than frustration,

Most likely you didn't kill it running 100 to 1 for that short of time and at low speed but maybe someone before you if they ran it at WOT for any length of time. What knob by the way? 68 is not good so you may want to retest with another tester. Not sure why it's running at home and not while your away.

View attachment IMG_4685.MOV

 

[Knotstrait]

Most likely you didn't kill it running 100 to 1 for that short of time and at low speed but maybe someone before you if they ran it at WOT for any length of time. What knob by the way? 68 is not good so you may want to retest with another tester. Not sure why it's running at home and not while your away.

The video was before I took it to marine, it ran good!
The knob I lost was the primer pump stick looks like choke knob, I thought it was choke

 

[saltchuckmatt]

The video was before I took it to marine, it ran good!
The knob I lost was the primer pump stick looks like choke knob, I thought it was choke

Check other post, no need to make two posts by the way

 

[flyingscott]

The misconception of 100-1 is it killed the motor while it was running. That is untrue, with the100-1 mix the problems happend during extended storage periods. The oil was not good enough to protect during those times. There are oils capable of being run 100-1 that do not have those issues.

 

[racerone]

Just run it at 50:1------100:1 is simply not enough oil a 5000 RPM !!

 

[flyingscott]

Just run it at 50:1------100:1 is simply not enough oil a 5000 RPM !!

You're wrong there are oils capable of running 100-1 at 5000+

 

[racerone]

Nope----Needs 50:1 at 5000 RPM------Oil and lubrication in 2 strokes is not well understood !

 

[flyingscott]

Nope----Needs 50:1 at 5000 RPM------Oil and lubrication in 2 strokes is not well understood !

Still wrong! No matter how many times you say it you will not be right. Maybe you just don't understand it? Maybe you should look at Amsoils Website. Never to old to learn they say. There are absolutely oils capable of running 100-1. The OMC oil just was not uo to the task.

 

[saltchuckmatt]

Still wrong! No matter how many times you say it you will not be right. Maybe you just don't understand it? Maybe you should look at Amsoils Website. Never to old to learn they say. There are absolutely oils capable of running 100-1.

Just curious, what oils are you referring to?

 

[flyingscott]

Just curious, what oils are you referring to?

Did you not see I referenced Amsoil. Amsoil will actually warranty their oils. With that I am out, I am not going to turn this into an oil debate the OP has his answer.

 

[PrairieH2OBOY43]

Did you not see I referenced Amsoil. Amsoil will actually warranty their oils. With that I am out, I am not going to turn this into an oil debate the OP has his answer.

I think Opti is 100:1 also. However I won’t run that low. 50:1 is leanest of my mixes. No smoke at 50:1.

 

[flyingscott]

I don't care what people decide to run in their motors. But to say it can't be done is not true. Run what you want. People need to know only certain oils can run 100-1 not all of them can.

 

[saltchuckmatt]

I don't care what people decide to run in their motors. But to say it can't be done is not true. Run what you want. People need to know only certain oils can run 100-1 not all of them can.

Sorry didn't see Amsoil reference.

From what I was told, from some top notch marine mechanics, was the tolerances and specifications of the motors needed to be designed for the mix ratio of oils. In the years that Omc made the recommendations of using 100 to 1 those tolerances weren't done, thus ruining many motors. If you trolled all day it was fine but if you ran the wide open a lot....poof. Of coarse back then oil technology wasn't like now so I think everyone's opinion on this one is correct.