Reply
 
Thread Tools Search this Thread
 
Old 29 April 2011, 14:56   #1
Member
 
Country: UK - England
Town: Newcastle
Length: 4m +
Engine: mariner 40hp
Join Date: Apr 2011
Posts: 11
what 2 stroke mix to use?

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
__________________

__________________
geordie_richie is offline   Reply With Quote
Old 29 April 2011, 15:04   #2
Member
 
kerny's Avatar
 
Country: UK - England
Town: Ashton-under-Lyne Lancs
Boat name: IMOGEN
Make: Air-Craft 5.4
Length: 5m +
Engine: Suzuki df70a
MMSI: 235087492
Join Date: May 2010
Posts: 7,078
RIBase
Send a message via Skype™ to kerny
Hi mate and welcome, if its 100 to 1 a 22ltr tank will take 1/2 ltr of oil
__________________

__________________
kerny is offline   Reply With Quote
Old 29 April 2011, 15:29   #3
Member
 
Country: UK - England
Town: telford
Make: shakespeare
Length: 6m +
Engine: 150 optimax
Join Date: May 2008
Posts: 300
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
__________________
markg is offline   Reply With Quote
Old 29 April 2011, 15:36   #4
Member
 
actions's Avatar
 
Country: UK - England
Town: Herne Bay
Boat name: Red May
Make: Zodiac
Length: 4m +
Engine: 40hp Honda 4 Stroke
MMSI: Is quite long
Join Date: Jun 2010
Posts: 653
Send a message via Skype™ to 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.
__________________
actions is offline   Reply With Quote
Old 29 April 2011, 15:40   #5
Member
 
Country: UK - England
Town: Newcastle
Length: 4m +
Engine: mariner 40hp
Join Date: Apr 2011
Posts: 11
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
__________________
geordie_richie is offline   Reply With Quote
Old 29 April 2011, 16:25   #6
Member
 
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
Join Date: Nov 2001
Posts: 1,815
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.
__________________
Dave M
www.wavelengthtraining.co.uk
wavelength is offline   Reply With Quote
Old 29 April 2011, 16:39   #7
Member
 
Country: UK - England
Town: Newcastle
Length: 4m +
Engine: mariner 40hp
Join Date: Apr 2011
Posts: 11
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!
__________________
geordie_richie is offline   Reply With Quote
Old 29 April 2011, 16:49   #8
Member
 
actions's Avatar
 
Country: UK - England
Town: Herne Bay
Boat name: Red May
Make: Zodiac
Length: 4m +
Engine: 40hp Honda 4 Stroke
MMSI: Is quite long
Join Date: Jun 2010
Posts: 653
Send a message via Skype™ to actions
Quote:
Originally Posted by geordie_richie View Post
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.
__________________
actions is offline   Reply With Quote
Old 29 April 2011, 17:41   #9
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 12,898
RIBase
Is it a 2 cylinder or a 3 cylinder?

2cyl is a Yamaha based motor and is 100:1, 3cyl is 50:1
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 29 April 2011, 17:43   #10
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 12,898
RIBase
Quote:
Originally Posted by kerny View Post
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.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 29 April 2011, 18:55   #11
Member
 
kerny's Avatar
 
Country: UK - England
Town: Ashton-under-Lyne Lancs
Boat name: IMOGEN
Make: Air-Craft 5.4
Length: 5m +
Engine: Suzuki df70a
MMSI: 235087492
Join Date: May 2010
Posts: 7,078
RIBase
Send a message via Skype™ to kerny
Quote:
Originally Posted by Nos4r2 View Post
No it's not-that's 44:1 if you use 1/2 litre to 22 litres.
I stand corrected,,, but I will still put 1/2 ltr in mine. I can't be arsed using a syringe.lol
__________________
kerny is offline   Reply With Quote
Old 29 April 2011, 22:24   #12
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 12,898
RIBase
Quote:
Originally Posted by kerny View Post
I stand corrected,,, but I will still put 1/2 ltr in mine. I can't be arsed using a syringe.lol
Mark up a coke bottle. It's better than oiling your engine up and making it run weak.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 30 April 2011, 04:58   #13
Member
 
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 913
40hp mar/merc forget the 100.1 decal remove and put it in the dustbin, always run at 50.1 a little bit of extra oil will not hurt and always run a little bit to rich, NEVER run a bit lean maybe good for fuel consuption but you will shorten the life of the p/h.
__________________
uncle al is offline   Reply With Quote
Old 30 April 2011, 12:37   #14
Member
 
nugent's Avatar
 
Country: UK - England
Town: Bromsgrove
Boat name: Kick-Ass !
Make: PAC/Artic 22
Length: 6m +
Engine: 250hp Yamaha
Join Date: Nov 2003
Posts: 3,547
so 50:1 is 25ml of oil per ltr fuel .............. yes?
__________________
˜™
MY BIGGEST WORRY IS THAT MY WIFE(WHEN I"M DEAD)WILL SELL MY TOY'S FOR WHAT I SAID I PAID FOR THEM.
nugent is offline   Reply With Quote
Old 30 April 2011, 13:02   #15
Member
 
nugent's Avatar
 
Country: UK - England
Town: Bromsgrove
Boat name: Kick-Ass !
Make: PAC/Artic 22
Length: 6m +
Engine: 250hp Yamaha
Join Date: Nov 2003
Posts: 3,547
ah haaaaaaaaa

http://www.csgnetwork.com/oilfuelcalc.html

20ml per ltr
__________________
˜™
MY BIGGEST WORRY IS THAT MY WIFE(WHEN I"M DEAD)WILL SELL MY TOY'S FOR WHAT I SAID I PAID FOR THEM.
nugent is offline   Reply With Quote
Old 30 April 2011, 15:25   #16
Member
 
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
Join Date: Nov 2001
Posts: 1,815
Quote:
2cyl is a Yamaha based motor and is 100:1
no it was a 2cyl yamaha based motor and 50:1 when I had one as per my previous post, despite 2cyl yams of that vintage being badged at 100:1 Stick 50:1 in and it'll be fine. Mine never let me down in 15years of year round use all round the uk and on three different boats. Stick 100:1 in and it would prob still be ok but we never ran any of them at that ratio no matter what the badge on it- its an awfully small amount of oil in an engine and more certainly aint gonna hurt, make it smoke or foul the plugs but it will ensure some decent lubrication.
Oh I do miss the smell of two stroke in the morning!
__________________
Dave M
www.wavelengthtraining.co.uk
wavelength is offline   Reply With Quote
Old 30 April 2011, 16:27   #17
Member
 
Country: UK - England
Town: Newcastle
Length: 4m +
Engine: mariner 40hp
Join Date: Apr 2011
Posts: 11
Thanks guys, Ive been out on it all day today running it 50-1, 100ml per gallon and it ran well all day!
Regards Richie
__________________
geordie_richie is offline   Reply With Quote
Old 01 May 2011, 14:34   #18
Member
 
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
Join Date: Nov 2001
Posts: 1,815
brilliant engines-bombproof-go for ever. Unlike the mercury derived later ones
__________________
Dave M
www.wavelengthtraining.co.uk
wavelength is offline   Reply With Quote
Old 02 May 2011, 08:46   #19
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,650
I guess it depends what you are doing with it. If you spend the whole day pootering about at idle to fish or rescue sailing dinghies, you could get away with a lighter mix.

Bear in mind some of the auto oilers run something like 200:1 at idle!

I will having said that agree with above -if you are running flat out most of the time, 50:1 won't do it any harm.



For what it's worth, when pre- oiling a tank, the thing to remember is that for 50:1, 2% of your tank volume should be oil, so for a

30L tank, you need 600 mL of oil
25L tank, you need 500 mL of oil
22L tank, you need 440 mL of oil
5L tank, you need 100 mL of oil

The down side to this is that you can't use a standard Cola bottle to "pre charge" a 30L tank...
__________________

__________________
9D280 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT -5. The time now is 12:56.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.