what 2 stroke mix to use?

[geordie_richie]

Hi sorry for asking this cos it will probably sound daft to most you guys!
Ive just got a 40 hp mariner 2 stroke looks late 80`s early 90`s and not sure what the mix would be?
The guy i got it off said 100-1?
so what would 100-1 be in ml-litres measurments?
when i used to have motorbikes i used to put 25 ml to every litre, Any help would be greatly appreciated.
Many Thanks
Richie

[kerny]

Hi mate and welcome, if its 100 to 1 a 22ltr tank will take 1/2 ltr of oil

[markg]

100-1 would be 10ml per litre, i have always used it a bit stronger than that, has not done any harm
220ml in a 22ltr tank would be 100-1, half a litre is probably what i would stick in it

[actions]

1 litre = 1000 millitres, so 100 to 1 mix makes it 10ml per litre.

Just make sure its 100:1 as i think a few will say 50:1 is better for the engine but others on here will clarify that.

Make sure its a decent marine outboard oil too, only use TCW3 oil.

[geordie_richie]

Thanks for that guys, ive read up and a lot seem to say 50-1 so i think ill pop up to the shop tomorrow and see if they can check for me just to be safe.
Thanks again
Richie

[wavelength]

they were 50:1 despite being identical to the yamaha 40 which was 100:1,
My boating buddy had the yam and I had the mariner. We used to run both at around 50:1, on the grounds that if 100 was good then 50 is better.

[geordie_richie]

yeh ive read a lot that the yams should be 50-1, really if i put 50-1 it cant harm it just make it a bit smokey!

[actions]

Originally Posted by geordie_richie

yeh ive read a lot that the yams should be 50-1, really if i put 50-1 it cant harm it just make it a bit smokey!

Exactly, 50:1 will ensure the engine is getting all the lube it needs...... and it wouldnt be a two stroke without the smoke.

[Nos4r2]

Is it a 2 cylinder or a 3 cylinder?

2cyl is a Yamaha based motor and is 100:1, 3cyl is 50:1

[Nos4r2]

Originally Posted by kerny

Hi mate and welcome, if its 100 to 1 a 22ltr tank will take 1/2 ltr of oil

No it's not-that's 44:1 if you use 1/2 litre to 22 litres.