6 Gallon Measuring Tool

Jam W.

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Jun 24, 2012
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1
I have had a tool that I used on our two cycle, mixed gas, metal 6 gallon fuel tanks for an outboard motor. It was plastic, about two inches wide, and calibrated on each side for either a six gallon or three gallon tank. The calibrations were for how much oil was needed for the remainder of the fuel in the tank. Somewhere that gauge was lost. Does anyone have a similar gauge, or where to find one?
 

Alumarine

Captain
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Feb 22, 2005
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3,757
My BRP Evinrude dealer sells an Economeasure # 0173965 plastic oil cup that make measuring 2 stroke oil easy.
 

airshot

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Jul 22, 2008
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6,169
I have a small plastic cup from wally world in the boating section and also availiable wherever boating supplies are sold that has various ratios printed on the side.
Such as a 25 to 1, a 50 to 1 and a 100 to 1 oil mix and breaks it down into gallons. For my kicker motor I look at the 50-1 chart and how many gallons I am going to mix and it tells me how many ounces of oil to add and the cup also is graduated in ounces so I simply pour into the cup the recommended amount of oil for the ratio/gallons I am mixing. My explanation may sound confusing but the actual cup is quite self explanatory when you see it. Less than 5 bucks, have had mine for many years.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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I follow the directions on the oil container and use simple math
 

JimS123

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Jul 27, 2007
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I have a white colored plastic quart oil bottle that is clear enough to see the level inside the can. It was the very first can of oil I bought back in about 1965, and the very first can of true "outboard" oil I ever bought. It has indentations in the side showing 1/3 pint increments. In 1965 I put marks on the side with a magic marker, indicating 1.5 gal gas, 3.0 gal, etc. Interestingly enough the marks are still visible. A real cheap (er, free) way to solve the problem.
 

roscoe

Supreme Mariner
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Oct 30, 2002
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21,862
Guys, I think he is looking for a dip stick, that will indicate gallons needed to fill, and the corresponding amount of oil needed for the gas.

Anyway, Jam W., welcome to iboats.
I have never seen one for an outboard fuel tank, but you can make one.

Just start with an empty tank, add 1/2 gallon of gas.
Insert dip stick and remove, mark level on stick. Perhaps use a 1" wooden dowel and mark the level with your pocket knife for now.

Then repeat the process, add 1/2 gallon, dip the stick and mark it.
Continue till tank is full.

For each mark on the stick, you need 1.3 ounces of oil.

So, starting from the top, mark the numbers 1.3, 2.6, 3.9, 5.2, etc.

Now to use it, dip the stick, note the number, add that amount of oil, then fill will gas.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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Jul 23, 2011
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the 1.3 ounces assumes a 100:1 ratio.

50:1 is 2.6 ounces per gallon
40:1 is 3.2 ounces per gallon
32:1 is 4.0 ounces per gallon
25:1 is 5.1 ounces per gallon
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Why make this so difficult???? Add the amount of fuel at the gas station to fill the tank. Note the number of gallons. Add the appropriate amount of oil for that amount of fuel. Use "reduction math" to figure the oil. 1 pint in 6 gallons is 50:1. 1/2 pint for 3 gallons is 50:1. 1/4 pint for 1-1/2 gallons is 50:1. If 50:1 isn't the ratio you need then use the same process by picking the ratio Scott provided. Even if you are off on the oil by a +/-10% margin the engine won't care. Any kitchen store has plastic, metal or glass measuring cups graduated in ounces if you feel you need this level of accuracy.
 
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