oil to gas ratio

I have a 25 hp Mercury.  Mid 1990s . I can't remember if it is 40 or 50 to 1 . My Evinrude is 50 to 1 , but I've only used the Mercury a few times  . In Premium unleaded gas of course. 

Thanks 

yep 50:1 no regrets

1998 40 hp mercury 50:1 since new quicksilver or mercury oil 0 problems.

Yeah, Johnson did the same thing with the 100:1 for a bit, it was a failed experiment.

50:1 is the way to go!

When in doubt I mix 2 stroke gas at 50:1. I had an old 5 horse Sea King (late 70’s ?) that recommended 24:1 and my mid 80’s 6 horse Evinrude recommended 100:1. 

I also have a 25hp Mercury 1999 outboard. It uses a 50/1 mix. 

I was using the Mercury  Quicksilver.  Maybe a quart or two a year .

I have a 1997 25 horse Merc.  I have used 50/1 ratio when I first got it.  I used cheap Shipmate TCW3 and it smoked a lot.  I went with Amsoil @ 100/1 for several years when i was on my Amsoil kick.  An old friend that moved to Colorado left some Merc TCW3 in his garage. I took it and it smelled less than the Amsoil @ 50/1. As of about 5 yrs ago , I went with a 2 OZ . per gal . mix.  ( 64/1) .  With my old motor ( 1986 25 horse Merc) the manula said 100/1 was ok if used in summer and several times per week. I never noticed anything bad about any of the mixes. I still have my 1997 Merc and it runs perfect. Amsoil has run 300/1 mix and the 2 stroke never blew seized. 

I agree 50:1, some older outboards, I would say 1970 or older did run 40:1, but a motor from the 90s will be 50 to one all day...

Thanks 

Should be 50 to 1