Fuel - Oil mix 100 : 1 ??

[JimS123]

Re: Fuel - Oil mix 100 : 1 ??

Just joking with you, man. I got your point, however. Everything changes, used to run 16:1, then 50:1...so why is everyone so reluctant to go 100:1? I agree, but I just cannot bring myself to go that route, yet. As I said above, I don't think Yamaha would risk their reputation in such a manner.

I had a mental image of your boat behind a Focus-one of those "moving catastrophes" you see on the internet.

have a good day,

John

I pulled my first boat with a 1961 Ford Falcon equipped with an inline 144 ci 85 HP six. Std shift - 3 spd column, full permiter frame. The boat was heavier than the car. Hardly burned any oil at all (the car I mean). Used that rig for 3 years with the original clutch, trans, etc. Using pickemup trucks today is highly over rated.

 

[jspriddy]

Re: Fuel - Oil mix 100 : 1 ??

I pulled my first boat with a 1961 Ford Falcon equipped with an inline 144 ci 85 HP six. Std shift - 3 spd column, full permiter frame. The boat was heavier than the car. Hardly burned any oil at all (the car I mean). Used that rig for 3 years with the original clutch, trans, etc. Using pickemup trucks today is highly over rated.

Pulling is not generally the problem-stopping is. I'm not an expert, but it sounds like to me that the boat being heavier than the car was a recipe for disaster, especially if the trailer didn't have brakes. You evidently got by with it.

I didn't mean to hijack this thread and get it off subject, which I have. My apologies.

Everyone have a good day,

John

 

[jspriddy]

Re: Fuel - Oil mix 100 : 1 ??

Gotcha...
Sarcasm sometimes doesn't always make it through clearly with just words on a screen...

I'll bet the old timers who ran the old outboards on 16:1 ND 30 weight had a hard time wrapping their head around a 50:1 ratio when most of the outboards in the 60's went that route. Things evolve over time, but sometimes it's hard to let go of the tried, and true.

FYI, the Focus is run on a 6:1 ratio, but for some reason I have a hard time with converters plugging up. Still trying to figure out why...
Jet boat gets pulled with a Smart For Two...

On the bright side, converters bring a great scrap price.

John

 

[matt167]

Re: Fuel - Oil mix 100 : 1 ??

Pulling is not generally the problem-stopping is. I'm not an expert, but it sounds like to me that the boat being heavier than the car was a recipe for disaster, especially if the trailer didn't have brakes. You evidently got by with it.

I didn't mean to hijack this thread and get it off subject, which I have. My apologies.

Everyone have a good day,

John

When a 1961 Falcon was new, roads were slower, people payed more attention and trailer boats were smaller/ mostly outboards.. Cars towing boats and campers were commonplace and the only things a truck towed was a hay wagon or other commercial enterprise.. In modern times, the trucks got bigger and the cars got smaller..

 

[jspriddy]

Re: Fuel - Oil mix 100 : 1 ??

When a 1961 Falcon was new, roads were slower, people payed more attention and trailer boats were smaller/ mostly outboards.. Cars towing boats and campers were commonplace and the only things a truck towed was a hay wagon or other commercial enterprise.. In modern times, the trucks got bigger and the cars got smaller..

That's true. It was commonplace to see cars towing everything. My father never owned a pickup. They were sort of a novelty. My grandfather had one for his oil jobber business, but that was one of a very few in town. Farmers didn't even own them. They had large 1 1/2 ton trucks with flatbeds and sideboards. These also served as the family vehicle for some.

John

John

 

[saumon]

Re: Fuel - Oil mix 100 : 1 ??

The other side is, no engine ever seized by having too much lube, so if you feel better, run it at 50/1

Not true. I have a 1994 Yamaha 2hp (single cylinder, direct drive) made to be run at 100:1 that I used to troll for hours on a canoe. As I, too, was scared, I tried running it at 50:1 (with premium lube) and, guess what? It was coughing, puffing smoke then it finally stalled after a few days. Carbon deposits everywhere, fouled plug, sticky ring. I had to let it soak for a couple of days with Merc PowerTune in the cylinder, pulling the rope a few times a day to rotate the flywheel a quarter-turn at a time, to be able to un-seize it.

I then switched to 100:1 (with Yamalube) and, since then, no more problems.

 

[aerobat]

Re: Fuel - Oil mix 100 : 1 ??

such themes of course are a great example on a forum where people swear on something they believe is right.
oil themes are a special forum classic, no question.

to stay on facts : yamaha says 100:1 and nothing else . how many threads can you find on seized yamaha engines here due to the 100:1 mixture ?

of course this will never satisfy everybody, and people who like to change plugs frequently and decarb engines will run richer mixture ratios believing they do their engine a favour, no question.

cheers

 

[jspriddy]

Re: Fuel - Oil mix 100 : 1 ??

such themes of course are a great example on a forum where people swear on something they believe is right.
oil themes are a special forum classic, no question.

to stay on facts : yamaha says 100:1 and nothing else . how many threads can you find on seized yamaha engines here due to the 100:1 mixture ?

of course this will never satisfy everybody, and people who like to change plugs frequently and decarb engines will run richer mixture ratios believing they do their engine a favour, no question.

cheers

Yeah, and how many who have had an engine seize could say definitely that is was because it was run 100:1? No engine has ever seized running 50:1?

Years ago, some people absolutely refused to use anything thinner than 20w50 in their cars. Look at the cars now on 5w30, 5w20, even 0w20 (how oil could be "0" viscosity, I don't know) and engines are running longer, better, cleaner.

All this to say, I don't know why so many were hesitant to go to 100:1. And I'm one of them. I'm at least going to 75:1 next tank and if that works, who knows? I might take the leap.

John

 

[pecheux]

Re: Fuel - Oil mix 100 : 1 ??

My outboard mecanic tells me that the more oil there is in a mix = the weaker the gasoline gets. Therefore if he's telling the truth would it also mean that adding more oil than recommended (or needed) to a premix = less hp ?

 

[Banoe]

Re: Fuel - Oil mix 100 : 1 ??

I have a 1995 3hp Yamaha I use 75:1to 80:1 mix in it. I found any thing richer than 50:1 made it run poorly. In my opinion when you keep adding oil to your mix it is effectively lowering the amount of gas in the mixture creating a lean condition in the combustion chamber. Lean conditions in the combustion chamber equal high heat and a burn piston. So while adding more oil to the mix may help lubricate the bottom end of the engine it is burning up the top end. So why do I use 75-80:1 mix? Well I just have a hard time just putting that little bit of oil in a gas can guess I am just chicken. Also use a top quality oil cheep products give cheep results IMO

 

[aerobat]

Re: Fuel - Oil mix 100 : 1 ??

Therefore if he's telling the truth would it also mean that adding more oil than recommended (or needed) to a premix = less hp ?

yes, absolutely. you can even try this by yourself and will see that adding more and more oil will result in a weaker and more and more sputtering engine.

@jspriddy : not sure if i got your post right or your mine, but to clarify : i,m pro 100:1 when the manufacturer approves this .

 

[jspriddy]

Re: Fuel - Oil mix 100 : 1 ??

...@jspriddy : not sure if i got your post right or your mine, but to clarify : i,m pro 100:1 when the manufacturer approves this .

I was just saying that I don't know why so many people are leery of the 100:1 ratio. I agree with you. I am definitely going at least closer to 100:1, maybe 75:1 and see how it does. The old "more is better" mindset is hard to break out of...

When my wife and I first got married, she made a lemon pie that was excellent. One day she decided if a little lemon was good, then...so she doubled the lemon in the next one. Well, it wasn't better, to say the least.

John

 

[aerobat]

Re: Fuel - Oil mix 100 : 1 ??

I was just saying that I don't know why so many people are leery of the 100:1 ratio. I agree with you. I am definitely going at least closer to 100:1, maybe 75:1 and see how it does. The old "more is better" mindset is hard to break out of...

i think its a mix of myths and misunderstanding where people think more oil is more protection. but it is not. today oils are capable of fully lubricate even with a thin oil film. when you add more oil you reach nothing since the parts needing lubrication are already oil film coated .

the excessicve oil is than, without lubricating anything , transported for combustion and burned- with all the downside effects. it soots up the plugs and soots the engine, espacially stucks the piston rings .

and you can be sure that when a manufacturer recommends 1:100 the engine has solid margins on it should the user make an mixing error .

 

[san dimas]

Re: Fuel - Oil mix 100 : 1 ??

I looked at my owners manual for my 1989 15hp Evinrude it said for break-in 50:1 after that it says 100:1. I was surprised.

 

[nwcove]

Re: Fuel - Oil mix 100 : 1 ??

I looked at my owners manual for my 1989 15hp Evinrude it said for break-in 50:1 after that it says 100:1. I was surprised.

you "may" get a bigger surprise if you run/store that motor using 100:1.

 

[JimS123]

Re: Fuel - Oil mix 100 : 1 ??

you "may" get a bigger surprise if you run/store that motor using 100:1.

Maybe yes, maybe no. While its true OMC changed their mind after SOME failures, certainly ALL of the 100:1s of the era did not fail.

I continue to be amazed at how some people care for and store their boats, and other mechanical equipment for that matter.