Or just find any plastic storage thingus that usually holds a few ounces.
Plastic yogurt containers come to mind. Carefully measure 2.6 ounces using
whatever you can. Cold medicine dosers work and you probably have one in
the drawer. When you get 2.6 oz. in there, make a line with a black marker.
Measure how high that is. If it is say 1 5/8" from the bottom, just
remember that number in case you have to use another yogurt container the
next time. If you have a permanent small container, you only have to mark
it once. If you use disposables, remember the distance to level.
I'd add just a little to make it run oily rather than the hotter leaner mix,
just to keep from frying a piston. A fouled plug is much easier and cheaper
Actually, too much oil causes a lean condition, but also,
counter-intuitively, a cooler operating temp, as the excess oil causes
that lean mixture to burn slower and cooler.
A lean mix in a 4 stroke will indeed cause it to run hotter.
I have no idea what "Stihl rep" you talked to, but he was probably a sales rep
and didn't know what he was talking about. Either that or he said something and
you misinterpreted it. In either event, you are still wrong.
Too much oil in gas/oil pre-mix leans the mixture, but at the same timer, LOWERS
the combustion temp, and this applies to all brands, not just Stihl. The oil
supresses the explosion. More oil, less fire.
Well, I guess it's just a matter of terminology. Rich and lean have meant
in the past, if I recall correctly, the air/gas mixture, with the resulting
circumstances being either a fouled plug, running hot and damaging
components, or just running crappy. Since lean mixtures don't really run
crappy (in my experience) but rather tend to run hot and burn up stuff,
again it's terminology. And rich mixtures can foul plugs, build up carbon,
or just run crappy. In a two stroke mix, that could be extrapolated to
describe the differences in performance and engine/parts life, but that
would be comparing apples to oranges.
Therefore, how does running too much oil cause the engine to run hot since
it adds more lubrication? Isn't that a condition that occurs when there is
too little oil and the parts are seizing on each other? Hmmm? Too much oil
has, in my vast experience never caused an engine to seize, but rather load
up, and that loading up may cause various problems. But not running hot and
seizing. I've burned up chain saws by running too much gas, but never
running too much oil.
I guess I'm confused.
No, you are not confused. Too much oil in the mix makes the mix VERY slightly
thicker, which may SLIGHTLY impeded it's flow through the carb jets, resulting
in a SLIGHTLY lean condition. The BIG difference in a rich mixture is that it
makes the gas less explosive,and therefore the combustion chamber temp is lower,
and things get fouled with the unburned mixture. A second problem with the
cooler combustion is that carbon deposits do not get burned off as they develop
and eventually the rings seize in the piston due to the buildup, and break.
Before that, the excess oil that is squelching the combustion will cause hard
starting and plug fouling.
top posting fixed
Stormin Mormon wrote:
>> My string trimmer needs 2.6 oz. oil per gallon.(50:1) How does one
>> measure 2.6 oz.? I mean besides using SWMBO's "good" measuring
cup... >> Do you have to be THAT accurate?
Actually it is important to measure the oil. Too much oil will actually
cause the engine to run lean which causes damage and lack of power and
will also cause excessive carbon deposits.
- Buy one little bottle of the premeasured which is the 2.6 then reuse from
- Buy the large bottle that has the gizmo on top and measures it out before
you pour. Works neat and no mess.
- For oil & other one time mixtures like say bug sprays, measure 2.6 oz of
water in SWMBO's then put water in like a disposable paper bathroom cup.
Mark the fluid like with a marker. Dump out water and dry. Fill to line
with oil or other toxic stuff. Return SWMBO's measuring cup and show her
you only put water in it. Get an atta-boy from her.
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