16:1 fuel/oil mix

[Smcgill]

• #1

This is the first I heard of.. 16;1 MIX
I HAVE SOME 40:1 , 32;1, 50:1 ... NOT GOING TO DO ANOTHER
Which mix would you use ?
It's for a Craftsman -358-356070

 

[Woodslasher]

32:1 seems close enough, provided the tune is adjusted to match.

 

[old CB]

50:1 will do you fine. 16:1 was maybe back in 1940-something. Oil has gotten better over time is why we can run 50:1. You'll hear different of course.

This is only if you're using newly bought oil. If you actually have a can of 16:1 (or whatever) oil, mix it at that rate.

 

[trains]

used 16:1 in go carts all the time, would lean out the H to give extra speed, and then flick it back as needed.

 

[vtfireman85]

My old OMC boat motors are 16:1, always end up with a rainbow slick following me around, kayakers get all upset, i find it best to act alarmed myself rather than reassure them it’s normal

 

[hosocat]

I found a montgomery ward saw on the curb (rebadged remington) with manual oiler. I was shocked when I saw it requires a 16:1 ratio. I'd never heard of an engine requiring that much oil!

 

[Fatherwheels]

My old OMC boat motors are 16:1, always end up with a rainbow slick following me around, kayakers get all upset, i find it best to act alarmed myself rather than reassure them it’s normal

I do the same when I fart at the checkout, wtf, who did that....
2 stroke smells better and no rainbow, well unless brown is in fashion.

 

[Jhenderson]

It’s from back when straight 30wt non detergent motor oil was used as the mix oil. As prev stated, modern 50-1 will work just fine.

 

[vtfireman85]

I found a montgomery ward saw on the curb (rebadged remington) with manual oiler. I was shocked when I saw it requires a 16:1 ratio. I'd never heard of an engine requiring that much oil!

Probably just wanted 30wt mixed though

 

[vtfireman85]

It’s from back when straight 30wt non detergent motor oil was used as the mix oil. As prev stated, modern 50-1 will work just fine.

This gets argued about a lot in boat circles, fact is bearings and tolerances aren’t what they are now, for me, if i cared about it, I would use the recommended dosage. Babbitt bearings need a little extra.

 

[Fatherwheels]

• #1

This is the first I heard of.. 16;1 MIX
I HAVE SOME 40:1 , 32;1, 50:1 ... NOT GOING TO DO ANOTHER
Which mix would you use ?
It's for a Craftsman -358-356070

No need for 16:1 with modern oils, good for insect control though.

 

[North by Northwest]

This gets argued about a lot in boat circles, fact is bearings and tolerances aren’t what they are now, for me, if i cared about it, I would use the recommended dosage. Babbitt bearings need a little extra.

Lawnboy lawnmowers had babbit bearings requiring 16:1 OMC Marine rated TCW-3 in the late 60's early 70's , no black flys in the neighbourhood back then !

 

[North by Northwest]

Probably just wanted 30wt mixed though

back in the 60's 2T oil was straight Sae.30 same for bar oil lol.The good old days !

 

[vtfireman85]

Lawnboys had babbit bearings requiring 16:1 OMC Marine rated TCW-3 in the late 60's early 70's , no black dots in the neighbourhood back then !

OMC went to needle bearings around 63-4-5-6, I believe. I have a 65’ 28hp and a 67 that one calls for 24:1 the other 50:1 both engines are identical, I suspect they weren’t trusting of the lighter mixture at first. ...just a theory

 

[North by Northwest]

This gets argued about a lot in boat circles, fact is bearings and tolerances aren’t what they are now, for me, if i cared about it, I would use the recommended dosage. Babbitt bearings need a little extra.

that is true also , tolerances were rather sloppy in the 60,s eventually in the early 70,s true 2 stroke oils were developed and engine technology tightened up and 32:1 became the standard . Oil was 50 cents a quart now some exotics are over $30 , ain't life Grand !

 

[vtfireman85]

I like me some old 2 strokes

 

[North by Northwest]

OMC went to needle bearings around 63-4-5-6, I believe. I have a 65’ 28hp and a 67 that one calls for 24:1 the other 50:1 both engines are identical, I suspect they weren’t trusting of the lighter mixture at first. ...just a theory

outboard ? I stated Lawn boy lawnmowers in my example .

 

[Slotracer577]

No need for 16:1 with today’s oils. Really anything from 32:1 to 50:1 is going to work well. 32:1 will be slightly more power and more oil buildup on piston, rings, and plug. You will need to adjust the carb to match whatever you choose as a mix.

 

[North by Northwest]

This gets argued about a lot in boat circles, fact is bearings and tolerances aren’t what they are now, for me, if i cared about it, I would use the recommended dosage. Babbitt bearings need a little extra.

I would agree when Babbitt bearing are present , higher viscocity oil is required 16;1 or at least 32:1 with good friction modifiers should be used . I know if any of the lawnboy fanatics heard even 32:1 a lynching would be in order ! lol.

 

[vtfireman85]

I would agree when Babbitt bearing are present , higher viscocity oil is required 16;1 or at least 32:1 with good friction modifiers should be used . I know if any of the lawnboy fanatics heard even 32:1 a lynching would be in order ! lol.

I was asking about this recently, as stated above OMC made their design change before deciding 50:1 was ok. Seems reasonable I could use 50:1 no problem but consensus was to use recommend ratio. I usually go heavy regardless, but of late ive been using the 67’ 33 hp and using 40:1, she ain’t getting any younger.