Outboard fuel

[Fish Whisperer]

I was told that I should be running the highest octane non ethanol fuel I can through my 25hp Yamaha outboard.
I knew that non ethanol was better for the motor but never considered the octane. Is this true?


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[XxthejuicexX]

I run the cheap stuff through my Johnson 150 fast strike. I tried other grades and the ethanol treatment and got poor results. I did the fuel treatment and my boat ran like crap. I just had all my cylinders compression tested and they are great for a motor the age of mine. Now smaller motors may be different.


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[Fish Whisperer]

I've been running 87 octane 10% ethanol through mine since day one.. I was told that's bad for it. It seems to run fine but I don't want to spend a boat load to repair stuff that ethanol tears up.


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[Alphahawk]

I am sure TK can give an answer but what does the manufacture say? I have a nephew who runs premium in his 4 year old 200 HP yet the manufacture clearly says it was designed to run on 87 octane. I think he is wasting a lot of money.


Regards


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[XxthejuicexX]

If I could quote both of the last two post I would. My motor is a 96 model and runs great on 87 with ethanol. I don't make premium gas money for as much fishing as I do :D

[MNfisher]

If I could quote both of the last two post I would. My motor is a 96 model and runs great on 87 with ethanol. I don't make premium gas money for as much fishing as I do :D


I am sure TK can give an answer but what does the manufacture say? I have a nephew who runs premium in his 4 year old 200 HP yet the manufacture clearly says it was designed to run on 87 octane. I think he is wasting a lot of money.


Regards


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I've been running 87 octane 10% ethanol through mine since day one.. I was told that's bad for it. It seems to run fine but I don't want to spend a boat load to repair stuff that ethanol tears up.


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You can quote as many as you want :)

[thehick176]

I ran ethanol gas in my old boat for years without a problem, but, it didn't sit still for more than a week at most. I think that's where problems arise is when people put ethanol gas in and let the boat sit for weeks, months at a time.

[Heiny57]

How about additives to remove water like star brite, or stabil for ethonal.

[Fish Whisperer]

Thanks, TK.. There's a Pure gas station close to my house and I will be getting my fuel from them for now on.


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[bfish]

Everybody complains about the high prices of marina gas, but unless I am mistaken, it is 100% with extra taxes (which go to fuel spills cleanups and boat ramp repairs). Just another option, especially if 100% is hard to find in your area.

[Heiny57]

I had a Pure by me that had 100% and they swapped to the ethanol mix. :mad:

[Fish Whisperer]

The one on Trousdale and Harding is still 100%..


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[tkwalker]

How about additives to remove water like star brite, or stabil for ethonal.

Heiny, I have heard both pros and cons on additives ... So far more good than bad ... I personally have not seen or know of any adverse problems from using it .... <'TK>< :)

[Heiny57]

Thanks TK, I bought my boat used last year and have been using Mercury quick klean and star bright water remover. It runs better now than when I bought it. Maybe the cleaner is removing some carbon. It had been sitting awhile so I'm sure things were gummed up.

[Dakota]

TK what about Yamaha 115 4 stroke. I use stabill went I use ethanol gas any harm with that ... In your opinion


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[Saltwaterwalt]

So TK, am I safe to say that if run a fuel/water separator (which I'm thinking of doing) I'd be ok to run ethanol?

[tkwalker]

So TK, am I safe to say that if run a fuel/water separator (which I'm thinking of doing) I'd be ok to run ethanol?

Anytime you take preventative measures ... Is always good ... Just another step !! .... <'TK>< :)

[tkwalker]

TK what about Yamaha 115 4 stroke. I use stabill went I use ethanol gas any harm with that ... In your opinion


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I would say anything that is 10 years old or less will be okay with ethanol when it comes to 4 strokes ... The Outboard Mfr's ... enveloped this into their engineering .... <'TK><

[Dakota]

Thanks TK my Yamaha is 7 years old.


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