Is 2 ounces really a big deal?

[Barry63052]

Ok, on my motor it HAD the oil injection system on it. The previous owner took it off and said to run a 50 to 1 mix. After looking around on here, I see that's pretty common. Now, I have a 5 gal gas can that I use for the boat. And If I add the "correct" amount of oil, I end up with 2 ounces left in the bottle. Now, I just added the other two ounces in the gas, thinking better to have to much than two little oil. But, now the motor is, to me anyway, idling rough.
Now this is my first boat, so it may be idling fine, and Im just paranoid. And yes, I know to much oil causes carbon build up and that's bad. But its just two ounces, per five gallons of gas. Is it really that big of a deal?

 

[Daviet]

Re: Is 2 ounces really a big deal?

I tend to do the same thing, one pint to 5 gallons of gas. What do your plugs look like, might be your idle problem is not the fuel mixture.

 

[boobie]

Re: Is 2 ounces really a big deal?

You may be starting to have some carb probs.

 

[phillnjack2]

Re: Is 2 ounces really a big deal?

well to get exactly 5 us gallons mixed at 50 to 1 it should be 13.32 fl ounces of oil.
if you put in an extra 2 ounces it would make the ratio around 43 to 1, so it could make a difference to the
slow running and idle smoothness.

if you do a lot of full throttle running thenm this would be fine, as a lot of people who run at full revs for most of the
time run as much as 32 to1 if they rev realy high.
personaly i try to keep the engines at 50 to 1 to keep everything nice and smooth all round.

im sure many people put in the extra couple of ounces.

just simply keep to the right amount and put the extra in another bottle each time, every 6 fill ups youl have a spare bottle of oil
so will also save money by doing it right !!!!!!!!


phill

 

[Barry63052]

Re: Is 2 ounces really a big deal?

Ok, I may as well just do it right. But since we are talking about it running rough, is it OK to add a fuel additive? Like a fuel injector cleaner? I know about the seafoam for decarbing it. But what about a smaller dose of seafoam to help clean it up? Any thoughts??

 

[Daviet]

Re: Is 2 ounces really a big deal?

What engine are you running?
Sea foam will not clean a carb by running it in the gas, it works well as a preventive measure to help eliminate carbon.
As boobie said, might be time to do some carb work.

 

[Barry63052]

Re: Is 2 ounces really a big deal?

40 horse evinrude.

 

[jimmbo]

Re: Is 2 ounces really a big deal?

I believe the 16 oz cans of oil were sized to mix with 6 US gallons of gas, 5 imperial gallons, or 23 litres.

 

[F_R]

Re: Is 2 ounces really a big deal?

Fer gosh sakes, dump the pint of oil in there and fill it up with gas. Why make life complicated? Unless you are WAY too much oil (like 2-3X) it won't hurt a thing. Too little oil is another story.

 

[phillnjack2]

Re: Is 2 ounces really a big deal?

it wont hurt it aprt from possibly giving bad idle ,too much smoke, running too rich, and helping to foul the plugs a bit faster.
But why not just do it right and save the oil for next fill up ?
some engines dont mid a touch extra,and some dont like any extra.
if running fast most of the time then yeah fine,but for idling and slow boating ? no its not good and will cause fouling fast and
a smelly boat if down wind of engine.

i agree too little oil is far worse


phill

 

[Chris1956]

Re: Is 2 ounces really a big deal?

The Johnnyrude motors from before 1964 used a 24::1 gas/oil mix. They ran fine year after year. I am with F-R on this. The only issue you have is spending a few cents on unnecessary oil.

 

[phillnjack2]

Re: Is 2 ounces really a big deal?

the johnson and evinrudes pre 1964 were nothing like todays engines, they dont come close.
i have a 1969 seagull that has 10-1 and can be used with sae 30 instead of 2 stroke, do you seriously think a modern engine
would run good on this ratio ? No ofcourse it wouldnt.
if your running fast all the time (4500 to 5500 rpm's) then a bit more oil wont do much harm if any,but if doing a lot of
slow running or trolling slow under 2500 rpm's (exactly what these engines were NOT designed for) then too much oil will
not be good, but can cause more problems like rough running and plug fouling,carbon build up etc.
ive never seen a johnson or evinrude made since the early 70's in any books that says its for running slow.
ive always seen recommended operationg range of between 4500 and 5500 and sometimes 5000 - 5500.
( i dont include e-tecs in this as they again are very different types of oil injection and ignition)
many people who do run slow the majority of times find 60-1 to be the best for them !!!!!!!!!

personaly i would expect bad slow running with too much oil in the tank.
the whole idea of vro/oms system was to try and get less than 50-1 when running slow,so this engine was not designed for
more oil at idle and infact less oil was recommended and would of been almost starved of the 2 stroke oil at idle speeds .

original poster on this topic says this is his first boat, lets put him right from the beggining and he will stay right,seems a bit
silly to start him off on the wrong path.

i dont think just bung it in the tank is a good answer to give a newbie as a helpfull one.

might just be me !!!!!!!!!!!!



phill

 

[Lone Duck]

Re: Is 2 ounces really a big deal?

the johnson and evinrudes pre 1964 were nothing like todays engines, they dont come close.
I have a 1969 seagull that has 10-1 and can be used with sae 30 instead of 2 stroke, do you seriously think a modern engine
would run good on this ratio ? No ofcourse it wouldnt.
If your running fast all the time (4500 to 5500 rpm's) then a bit more oil wont do much harm if any,but if doing a lot of
slow running or trolling slow under 2500 rpm's (exactly what these engines were not designed for) then too much oil will
not be good, but can cause more problems like rough running and plug fouling,carbon build up etc.
Ive never seen a johnson or evinrude made since the early 70's in any books that says its for running slow.
Ive always seen recommended operationg range of between 4500 and 5500 and sometimes 5000 - 5500.
( i dont include e-tecs in this as they again are very different types of oil injection and ignition)
many people who do run slow the majority of times find 60-1 to be the best for them !!!!!!!!!

Personaly i would expect bad slow running with too much oil in the tank.
The whole idea of vro/oms system was to try and get less than 50-1 when running slow,so this engine was not designed for
more oil at idle and infact less oil was recommended and would of been almost starved of the 2 stroke oil at idle speeds .

Original poster on this topic says this is his first boat, lets put him right from the beggining and he will stay right,seems a bit
silly to start him off on the wrong path.

I dont think just bung it in the tank is a good answer to give a newbie as a helpfull one.

Might just be me !!!!!!!!!!!!



Phill

yep!

 

[phillnjack2]

Re: Is 2 ounces really a big deal?

yep to what ?

wanting to put people on the right path from the beginning
or just me wanting it to be correct after having many engines play up due to too much oil.

strange how large companies spend millions on research to get correct mixtures to keep engines running smoothe.
then some just bung it in the tank and take no notice of the mixture.
the refill a few hours down the line with some fuel already in the tasnk and bung in another can of oil as it obviously dont matter.

4 tanks of juice later your running at a ridiculous rate of oil and then complain that the engine aint right.

50 -1


phill

 

[Chris1956]

Re: Is 2 ounces really a big deal?

Phil and Duck. You guys are just plain wrong. Today's modern OBs are specified to run on a 24::1 mixture, during the first hours of break-in. In addition, Johnnyrude made that 2 cylinder 25-40HP motor for decades. In the late 50s or early 60s she was converted from sleeve bearings to all needle and roller bearings and then could use the 50::1 mixture. Engines running 50::1 usually smoke less than those running 24::1, and may carbon up slower, but a slightly lower ratio as the OP proposes will have no effect. Heck, gas/oil that sits a week in a vented can will have some gasoline evaporation, changing the ratio.

In his case, the extra oil is meaningless.

 

[1946Zephyr]

Re: Is 2 ounces really a big deal?

Fer gosh sakes, dump the pint of oil in there and fill it up with gas. Why make life complicated? Unless you are WAY too much oil (like 2-3X) it won't hurt a thing. Too little oil is another story.

X2 Oil is the cheapest thing you'll ever put in an outboard. It's a lot cheaper than a rebuild.