Shipyard Isl. Marine Engine Parts - ? regarding yamaha Ethanol fuel service bulletin.

I have an F115TLRD. I maintain it well, use Ring Free, and Ethanol Free fuel. My octane and brand can vary depending on where I purchase the fuel. Yamaha states that regularly burning gas higher than 87 octane can contribute to carbon build up and cause incomplete combustion. They say only to do it when advised by the manufacturer.

I guess ethanol free at 87 octane is best. I wonder a few things. First, how much better are the bigger brands of gas than the unbranded gases. Are they worth pursuing. Second, does anyone here have experiences burning the 87 and higher gas who has noticed a difference. Also, I have ethanol fee mid grade for a good brice around the corner from me. IT is BP gas. I wonder if 87 octane ethanol free is worth driving else where for. It's lower Octane, but off brand gas. Hard to decide because there are so many variables.

Andy, I did a search and read where you guys sell mid grade gas. I believe it was ethanol free. Do you believe there are any carbon build up issues in any motors running this or any incomplete combustion issues if that can be observed.

I wish Yamaha's bulletin had more detail. The real world doesn't always offer perfect choices and they have no advice what so ever in regard to running ethanol free fuel. It's strange they remain silent in this regard considering the number of people running ethanol free.

Any thoughts in regard to this issue are welcomed!!! Thanks.

Yamaha states that regularly burning gas higher than 87 octane can contribute to carbon build up and cause incomplete combustion. They say only to do it when advised by the manufacturer.


I wish Yamaha's bulletin had more detail. The real world doesn't always offer perfect choices and they have no advice what so ever in regard to running ethanol free fuel. It's strange they remain silent in this regard considering the number of people running ethanol free.

Any thoughts in regard to this issue are welcomed!!! Thanks.s

Doesn't the owner's manual say to use 87 octane minimum? I believe so.

Does it say anything at all about not using a higher octane rated fuel for some adverse reasons? I don't think so.

Doesn't minimum mean not lower, but that more is acceptable?

Some highways have minimum speeds. Is it OK to go faster? I think so as long as a maximum limit is not posted. Would this be any different than an engine maker saying to use a minimum of X octane, when a maximum allowable is not stated?

The best thing you can do with fuel in any boat is use it up. If you are going thru fuel, and re-filling on a steady basis, in my opinion your fuel issues will be far and few between.

Try to stick with the same type of fuel.

87 is what Yamaha recommendeds for your engine. Using a higher octane is fine, but not needed. That being said, I have read that gas loses octane over a period of time. In my mind, a higher octane will degrade slower. .

Andy

s

Doesn't the owner's manual say to use 87 octane minimum? I believe so.

Does it say anything at all about not using a higher octane rated fuel for some adverse reasons? I don't think so.

Doesn't minimum mean not lower, but that more is acceptable?

Some highways have minimum speeds. Is it OK to go faster? I think so as long as a maximum limit is not posted. Would this be any different than an engine maker saying to use a minimum of X octane, when a maximum allowable is not stated?

Sir,
The fact is that the manual was probably written in 2004. The fuel service bulletin came out much later and applies to all Yamaha motors. The fuel service bulletin takes into account wide spread use of ethanol fuel where the manual does not. I am not using ethanol fuel, but that doesn't mean they couldn't have changed their minds on that recommendation also. Yamaha updates their manuals as they see fit and I am not a mechanic and could be unaware of information Andy may have. Next time I will address my questions to Andy only so only qualified decent people reply to my posts.

I have not been on the Hull Truth very long, hopefully most of the members are decent people and you are not typical of the people who post here.

Please do not respond to my questions again.

The best thing you can do with fuel in any boat is use it up. If you are going thru fuel, and re-filling on a steady basis, in my opinion your fuel issues will be far and few between.

Try to stick with the same type of fuel.

87 is what Yamaha recommendeds for your engine. Using a higher octane is fine, but not needed. That being said, I have read that gas loses octane over a period of time. In my mind, a higher octane will degrade slower. .

Andy

Andy,

Thanks for the reply!!!!

I have not been on the Hull Truth very long, hopefully most of the members are decent people and you are not typical of the people who post here.

Please do not respond to my questions again.

Well alrighty now..... 7 posts since 2010 and he slams a 5,000+ post well known member in his 6th post. Off to a good start for sure. God help him if he wanders into the bildge.

Well alrighty now..... 7 posts since 2010 and he slams a 5,000+ post well known member in his 6th post. Off to a good start for sure. God help him if he wanders into the bildge.

You would think at 5000 posts he would know better than to defend an eight yr old manual. Especially in such a crass obnoxious way. I wasn't born yesterday, so I know info changes as time goes by and maintenance recommendations and other things can also. Especially with changing fuel.

I don't understand your remark comparing my number of posts to his. Their is no excuse for him to be that rude. In fact, he's a seasoned poster and should know even better as a result. Perhaps you need to do some thinking before you defend a person who is that rude. It makes you look bad!!!


Welcome to internet forums. Your gonna need to grow a thicker skin or man up just a little. Ballbusting is all in fun...stop being a sissy.

Think about it... Jethro is correct with what he says. But I also get your point...wanting to know the most current info. You have it though. If there was something updated, he would have mentioned it....im sure. I can't ever recall Yamaha changing any fuel type data on any engines.

87 is what Yamaha recommends.........even for a new F115XA engine. :thumbsup:

They don't let Jethro out much...he sits at a desk all day, no windows, and they feed him peanuts cooked in 2-stroke Yamalube and a sip of water when he gets cranky. :grin::grin:

All kidding aside, Jethro is a good guy. :)

You would think at 5000 posts he would know better than to defend an eight yr old manual. Especially in such a crass obnoxious way. I wasn't born yesterday, so I know info changes as time goes by and maintenance recommendations and other things can also. Especially with changing fuel.

This has nothing to do with the guys posts...

Since you havent been around here long, you need to choose your battles a little more wisely

Jethro happens to be one of our go to guys that works in the business and understands Yamahas...very well.

And the reason he mentions the manual is because so many people want to know how to rebuild a powerhead but neither have a manual nor the skill to do it. Having a manual and understanding it is a good place to start..

If your offended by his post, as someone else mentioned, grow some balls

Crass and obnoxious?? Man, you haven't seen anything yet.....:rofl:

This has nothing to do with the guys posts...

Since you havent been around here long, you need to choose your battles a little more wisely

Jethro happens to be one of our go to guys that works in the business and understands Yamahas...very well.

And the reason he mentions the manual is because so many people want to know how to rebuild a powerhead but neither have a manual nor the skill to do it. Having a manual and understanding it is a good place to start..

If your offended by his post, as someone else mentioned, grow some balls

Crass and obnoxious?? Man, you haven't seen anything yet.....:rofl:

The fact is that the fuel service bulletin says to not regularly exceed 87 octane. The manual says to not go below 87 octane. This may not be a direct correction of the manual, but it mine as well be. The fuel service bulletin comes out after the manual and applies to all Yamahas. I can read unlike some people. This guy implies I can't understand basic english when the fact is that he is the person that can't. If you are going to be a wise ass you need to at least be a correct one.

Maybe this is the way you guys talk on the forums and I am unaware of that. This guy Jethro doesn't know me so if he's smart he will be aware of this and be more polite until he does.

So, in effect he did two things in one post that were not very intelligent or correct.

Thanks for the other replies, you guys clearly like him so you want to defend him. Sometimes when people royally screw up its best for them to simply admit they did so. After the incorrect post he threw at me I am sure its hard to swallow that much pride however.

By the way, I wasn't choosing a battle. I was responding appropriately. If someone is going to insult my intelligence then I am going to respond. He chose to do this, no one else did. He made a mistake and that's all there is to it. Being here a lot doesn't mean having the right to insult people. That's a sad excuse.

Welcome to internet forums. Your gonna need to grow a thicker skin or man up just a little. Ballbusting is all in fun...stop being a sissy.

Do you know me? No you do not!!! You need to not call a person a sissy unless you know them and how they would take that. Your a rude person and you think it's OK because your not saying that to my face. You need to think twice and not respond to my post either.

Tibnav, it was not my intent to insult you. If I did so, then I apologize.

Do you have a number for the bulletin that you are referring to? I would like to see for myself what it says.

Tibnav, it was not my intent to insult you. If I did so, then I apologize.

Do you have a number for the bulletin that you are referring to? I would like to see for myself what it says.

Jethro - you're giving him a lot more respect than he deserves. That's the sign of a class act - you are welcome on my boat anytime :thumbsup:

Tibnav, it was not my intent to insult you. If I did so, then I apologize.

Do you have a number for the bulletin that you are referring to? I would like to see for myself what it says.

http://www.simyamaha.com/category_s/2638.htm

I appreciate the apology. I can be a smart ass also. Sometimes I screw up and have to apologize to a person when I see I have.

How could you know after all that in the last three years my dad, my brother in law, and my cousins x girlfriend have all died. My dad after three months of ICU and hospice. My cousins x girlfriend had a heart attack after she got it out of me he was dating someone new. My dog dog died in December and my nephew was beaten within an inch of his life back in October. Every bone in his face was smashed and he had fifteens hrs of reconstructive surgery. His face is now full of metal plates. He's having serious mental issues from the ordeal as one would expect.

I wouldn't have been as insistent if it weren't for so many people defending the reply. You said nothing else and I took that as largely saying you thought I might be at least somewhat correct or you weren't as certain. It's amazing how many people want to chime in like little children when two people are conversing directly. Many people have never matured past kindergarten and clearly don't seem to feel they need to. My fishing buddy is an overbearing crass critical person. His son won't even go fishing with him and he won't consider doing anything except blaming his son. I have now quit fishing with him also and many other people have done the same. It's still nothing to do with him in his view of course..

A lot of these people defending your post remind me of him. The people in New York city who spit on opposing players at baseball games also come to mind. Some people are completely without a conscious and respect for others. It's always somebody else's fault of course.

One thing common sense dictates is that many people at any time are going through experiences where they will not appreciate these responses. This of course is too complicated a notion for the small brains many people have.

Thanks again for the apology.

lollies

lollies

The guy near me on the lake has a skull and bones flag in black that he flies very proudly. Reminds me of that creepy thing near your boat on your post. He's a collections agent who drinks a lot, talks loud, and seems excited about so many people being in financial trouble. Your in fine company their bud!!!!!

:thumbsup:

:thumbsup:

Your response actually caused me to crack a smile!!! Only way I know how to respond to that!!! Yikes!!!!

see I'm realy not a bad dude. I'm the kinda guy that will laugh at ya if you slip and fall off your boat. But I will also be the first to help if you slip, fall off your boat and break your arm. Enjoy THT it's an awesome site!!

;?....I apologize, too. Wait! I didn't say anything........:banghead:

;?....I apologize, too. Wait! I didn't say anything........:banghead:

No time like the present to stir the pot!!LOL

OK, so to recap, Yamahaha says to not exceed 87 octane regularly, now what was your question again? Do a search and spend the next week reading all you care to know about fuel. Some will be true, some will not, and some may only be partially true. You can decide what's best for you without exposing yourself to the rude and crude here about. It's a free site populated by all manner of folk, probably best to not post when feeling vulnerable ... ;?

Y'all do realize an octane rating is an average rating and not specific enough to fall into the "should not be below 87, and then should not be above 87", right? Hell with all the varying degrees of alcohol I doubt it ever hits it on the mark (10% alcohol apparently varies to as high at 15 or 20% in some markets according to some reports - who really knows?).

Also the octane rating of fuel will degrade as it sits either in the ground at the pump or in the tank of your boat. I always ran mid grade with a healthy dose of marine stabil in my tanks for this very reason. I never seemed to burn through a full tank in an outing (even when I could afford to, much less now), so some of that fuel tends to sit no matter what. It's pretty much impossible to run it dry after every trip and if you fill it to the top, well it's back to the sitting in the tank and slowly degrading thing again. My logic was if it degrades some, it would be better to be at or above 87 than below it.

I think that not above 87 octane is a misprint. But I'm not Yamaha either....

Y'all do realize an octane rating is an average rating and not specific enough to fall into the "should not be below 87, and then should not be above 87", right?

I did, and I suspect Yamhaha did when they printed the manual 10 years ago. And I also suspect they know most land-based fuel outlets dispense from a pump labeled fuel 87, 89, or 92 (or at least they did before we were forced to start burning so much food), and that most users have no way to check actual octane when choosing ... ;)