1965 18 Hp Johnson

[EazzeO]

Hi to all,
Well im sorry to all that i must ask this question. Ive been getting mixed answers about the gas mixture of my 1965 Johnson 18 hp fd 19. The most people say 50:1 but Ive heard 40:1 because the bearings need a little more lube. I am using tcw 3 oil. Also would this be the same for my 9.5 Evinride sportwin?
Again sorry I know you guys get annoyed with these questions but i better be safe then sorry.
Thanks,
Cheers

 

[F_R]

Re: 1965 18 Hp Johnson

It is 50:1. A lot of people like to use more, that is their choice. But 50:1 is just fine. There are no plain bearings in that motor. Everything is rollers.

 

[Vic.S]

Re: 1965 18 Hp Johnson

The recommendation is 50:1 for almost all engines since 1964

http://www.evinrude.com/en-US/Owners-Center/FAQ/OilAndFuel

The exceptions are some engines after that date which do not have needle bearings and perhaps a few earlier ones with needle bearings that can also be be run safely on 50:1 as well

 

[ezeke]

Re: 1965 18 Hp Johnson

Agree with the others. The factory manual at that time was quite specific, click the thumbnail, please.

 

[EazzeO]

Re: 1965 18 Hp Johnson

Thanks to everyone for the help. I figure 50:1 was correct but just wanted to make sure. It smokes a lot at idle even after a hard treatment of seafoam.

 

[Vic.S]

Re: 1965 18 Hp Johnson

Perhaps it is smoking as a result of the Seafoam treatment.

http://forums.iboats.com/showthread.php?p=2648076#post2648076