Oil + Gas Mixture 25 Horse Johnson

jigemup

Cadet
Joined
Mar 29, 2011
Messages
19
I have a 1976 25 horse Johnson, and am wondering about the oil mixture. I would like to use AMS Oil Marine 100:1. Is that safe? Or I could mix it at a ratio of 80:1 as well? Just wondering, any help would be great!
 

Mas

Lieutenant Commander
Joined
Oct 3, 2006
Messages
1,656
Re: Oil + Gas Mixture 25 Horse Johnson

I do not know what AMS is, but I would not run anything other than TCW-#3 at 50:1.

Mas
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: Oil + Gas Mixture 25 Horse Johnson

I do not know what AMS is, but I would not run anything other than TCW-#3 at 50:1.

Mas

That makes two of us.
 

jigemup

Cadet
Joined
Mar 29, 2011
Messages
19
Re: Oil + Gas Mixture 25 Horse Johnson

AMS oil is a brand, it is recommended for tcw3 and api-tc applications. It is a outboard oil. The bottle says that it prevents wear and rust at lean mix ratios. It says that 80:1 is ok as well as 100:1. It comes in an easy to use bottle that is 8 oz. Any other thoughts? Thanks!
 

k7kit

Recruit
Joined
Mar 29, 2011
Messages
3
Re: Oil + Gas Mixture 25 Horse Johnson

I believe he means Amsoil Sabre Synthetic 2-Cycle Oil.
 

Mas

Lieutenant Commander
Joined
Oct 3, 2006
Messages
1,656
Re: Oil + Gas Mixture 25 Horse Johnson

Not saying there isn't some "wonder oil" out there, just not in my outboard.

If it aint broke, don't fix it. For me, TCW-3 @ 50:1

Oil is pretty cheap, fixing 'em isn't.


Mas
 

kfa4303

Banned
Joined
Sep 17, 2010
Messages
6,094
Re: Oil + Gas Mixture 25 Horse Johnson

Mas is right. TCW-3 at 50:1!! err on the side of caution. 100:1 is never enough no matter what the label says.
 

12vMan

Lieutenant Commander
Joined
Jun 4, 2008
Messages
1,532
Re: Oil + Gas Mixture 25 Horse Johnson

Mas is right. TCW-3 at 50:1!! err on the side of caution. 100:1 is never enough no matter what the label says.

definately right!
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Oil + Gas Mixture 25 Horse Johnson

Amsoil swears by their 100:1 mix and has been for a number of years. So far they haven't gone bankrupt from warranty/liability claims. However, I am not going to do it in my motors. Or tell anybody to do it in theirs.
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: Oil + Gas Mixture 25 Horse Johnson

Anything that says it can run on 100:1.........ignore it. 50:1 is about the leanest any outboard should be run at. Motors that spend a lot of their time at WOT, I would bump the mix up to 32:1 If they troll 85% of the time or more, then it's okay to run leaner.
 
Top