Oil Mixture for 58 Johnson 18hp Seahorse

[maverickrv]

I just received the metal fuel tank hoses and connectors for my 58 Johnson 18hp Seahorse.

The tank is full of 3 year old fuel, oil and preservative. Any idea how to clean the tank out, I dont think I want to try to run that old fuel through the engine.

Also what mixture should I be using? I have heard lots of 24/1 & 50/1 but im not sure which to use in my engine.

It supposedly had $300.00 worth of work done on the engine about 2 or 3 years ago and ran great, but was then never used.

Any hints on how to get it running would be appreciated. I have been looking at all of the threads for hints and would like to get a little specialized info if possible.

Thanks

 

[Daviet]

Re: Oil Mixture for 58 Johnson 18hp Seahorse

Don't use the old gas, dump it, get rid of it. The correct oil ratio for your engine is 24:1, you will see different opinions on this depending on the type of bearings in your engine and the type of oil being used.

Look in the "Top Secret File", all kinds of good stuff in there on bringing an engine back to life.

 

[Daviet]

Re: Oil Mixture for 58 Johnson 18hp Seahorse

Sorry for the double post.

 

[JB]

Re: Oil Mixture for 58 Johnson 18hp Seahorse

Actually, the latest from BRP calls for 20:1 in the '58 18HP.

Oiling 2 stroke fuel is like drinking water. More than you need is harmless, less than you need will kill you.

 

[asdasc]

Re: Oil Mixture for 58 Johnson 18hp Seahorse

After reading about a hundred opinions and facts about why I can use less or why I should use more, I settled on 24:1 in my 59 18HP. It runs great without any issues and have had it in use weekly for 2 years.

Based on that, i don't see any reason to change from that. Modern gas from a gas station goes bad quickly (3 weeks?) because of all the low emissions stuff they put in them. try to find either real marine gas without ethanol or always run some stabilizer in the gas. Otherwise, you are just making plans for your next carb rebuild.

If you run ethanol, replace your fuel lines with newer ones that can take it without self destructing.