pre-mix oil measurements for 1985 yam/mariner outboard motor

Submitted: Monday, Nov 27, 2006 at 14:05
ThreadID: 39812 Views:4318 Replies:5 FollowUps:0
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Hi all
I just bought a 1985 ish25hp mariner (Yamaha produced) outboard.
Can anybody tell me if the pre-mix oil volume is 50-1, or 25-1..

Thanks for your input.
Cheers
Brian&Deb
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Reply By: Patrol22 - Monday, Nov 27, 2006 at 14:25

Monday, Nov 27, 2006 at 14:25
I have a 9.9 mariner of about the same vintage...it is 50:1
AnswerID: 207114

Reply By: Member - Norm C (QLD) - Monday, Nov 27, 2006 at 14:45

Monday, Nov 27, 2006 at 14:45
Brian and Deb, 50:1 will be the go. Pretty much all outboards of this era were 50:1.

Just make sure you use a quality outboard oil, designed for water cooled engine.

Norm C
AnswerID: 207116

Reply By: DP - Monday, Nov 27, 2006 at 22:06

Monday, Nov 27, 2006 at 22:06
We use 25hp Merc's at our lifesaving club on the duck.

50:1 is the right ratio.

Cheers,

Dan
AnswerID: 207210

Reply By: SWAMPY 2 - Monday, Nov 27, 2006 at 23:49

Monday, Nov 27, 2006 at 23:49
I have a 2004 15hp Mariner ( Mercury produced ) & mixture is 50:1
AnswerID: 207224

Reply By: gav99x - Tuesday, Nov 28, 2006 at 12:01

Tuesday, Nov 28, 2006 at 12:01
My 2002 Yamaha 30hp is 100:1, I believe it's the same as the early Mariner's, just modernised slightly (whether this is to do with the oil ratio I don't know though sorry).

OT My 1961 British Seagull on the other hand is 10:1, if you like lots of smoke, this is the way to go ;)
AnswerID: 207299

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