Octane Requirements

[Hahn007]

I have an 85 Evinrude 15HP motor and am curious as to what octane rating is correct to use.
i.e. 87 Regular, 89 Mid-grane, 91 Super
Any thoughts or ideas?

 

[Vic.S]

Regular

+ 2% TCW3 twostroke outboard engine oil

 

[Tim Frank]

For those whose measuring gear does not have a "%" scale (just about everybody ) , that would be 50:1, fuel : oil.

 

[Hahn007]

But has anybody experimented with the different octanes's and noticed any differences?

 

[vasy]

But has anybody experimented with the different octanes's and noticed any differences?

Yes, bigger hole in the wallet.

 

[emdsapmgr]

My 85 factory sales brochure has this to say about your engine's fuel requirements: it can use lead-free, leaded regular or gasohol, so long as it is at least 86 octane. (excepting the V6 and V8 products lines)

 

[Hahn007]

Ok. Thank you.

 

[Bosunsmate]

use avgas, smells better