How do you guys mix Gas

jimmbo

Supreme Mariner
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May 24, 2004
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Pouring the oil into a tank of gas, with no mixing, was one of the main Reasons that the Engine Manufacturers, developed the Oil Premixing Systems back in the mid 80s. They were tired of boaters wrecking engines, then blaming the Engine, instead of themselves
 

ahicks

Captain
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Sep 16, 2013
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Pouring the oil into a tank of gas, with no mixing, was one of the main Reasons that the Engine Manufacturers, developed the Oil Premixing Systems back in the mid 80s. They were tired of boaters wrecking engines, then blaming the Engine, instead of themselves
KISS!!!!!
 

dingbat

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Nov 20, 2001
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Pouring the oil into a tank of gas, with no mixing, was one of the main Reasons that the Engine Manufacturers, developed the Oil Premixing Systems back in the mid 80s.
That was 40 some years ago….

Fuel and oil formulations are very different now. Synthetics, semi-synthetic and heavy solvent loads (ease of mixing and injector use) were not the norm back then. Some oil brands have now gone as far as to advertise their oil’s “self mixing” qualities
 

Grub54891

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Jun 17, 2012
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I simply put the fuel in and add the correct amount of oil. Never blew one up in my 50 years of mixing.
 

airshot

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The new oils are far better mixing than ever, but are you a gambler??? Some are, some aren't !! Being from the old days and not willing to gamble on a 5K outboard motor, I will stick with what I know works ! Some folks are very lucky or fortunate to have had sucess without trying.
 

jimmbo

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That was 40 some years ago….

Fuel and oil formulations are very different now. Synthetics, semi-synthetic and heavy solvent loads (ease of mixing and injector use) were not the norm back then. Some oil brands have now gone as far as to advertise their oil’s “self mixing” qualities
Oil is still heavier/denser than Gasoline, and the Laws of Physics still apply...
 

JimS123

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Jul 27, 2007
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Oil is still heavier/denser than Gasoline, and the Laws of Physics still apply...
That's true. Today's changes show modern chemistry at its finest. The right surfactant can do wonders. And the right emulsifier can make water blend with anything.
 

briangcc

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Jul 10, 2012
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When I had a pre-mix 2 stroke I'd add the oil to the empty 5 gallon portable gas can. Take said gas can to local gas station and fill it up. Gas from the pump would mix the oil in. Then take gas can back to boat and top off the built in tank. Repeat as many times as needed.

That was back in my younger (lighter) years. These days I wouldn't own a pre-mix.
 

ahicks

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Sep 16, 2013
Messages
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When I had a pre-mix 2 stroke I'd add the oil to the empty 5 gallon portable gas can. Take said gas can to local gas station and fill it up. Gas from the pump would mix the oil in. Then take gas can back to boat and top off the built in tank. Repeat as many times as needed.

That was back in my younger (lighter) years. These days I wouldn't own a pre-mix.
These days I wouldn't own a 2 stroke!
 

airshot

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I have to admit that my oil injected Merc has spoiled me even though mixing oil and gas never bothered me for the past 60 years, just got into the routine and never thought much about it. Now when I fill the fuel tank, I just top off the oil container. I am not ready for a four stroke either, my neighbor's son has a boat very similiar to mine, his has a 50 hp 4 stroke Honda. Mine has a 40 hp Merc two stroke and will run circles around his. That Honda is quiet, easy on fuel and runs very nice but mine is quicker, smoother idle and the extra fuel usage is minimal. The Honda is much larger and I assume much heavier. I guess time will tell, see what the future brings, just not ready to try and fix what ain't broke...
( dont know why it turned into bold lettering)
 

jimmbo

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May 24, 2004
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You may change your mind after learning how to pick out the right size prop....
They lack the Torque for Acceleration that the old 2 strokes had. Maybe that is why people are now asking if 150hp is enough to pull a Skier, on a 16 ft boat...

I have probably been propping boats long before you were born
 
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jimmbo

Supreme Mariner
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May 24, 2004
Messages
13,446
I have to admit that my oil injected Merc has spoiled me even though mixing oil and gas never bothered me for the past 60 years, just got into the routine and never thought much about it. Now when I fill the fuel tank, I just top off the oil container. I am not ready for a four stroke either, my neighbor's son has a boat very similiar to mine, his has a 50 hp 4 stroke Honda. Mine has a 40 hp Merc two stroke and will run circles around his. That Honda is quiet, easy on fuel and runs very nice but mine is quicker, smoother idle and the extra fuel usage is minimal. The Honda is much larger and I assume much heavier. I guess time will tell, see what the future brings, just not ready to try and fix what ain't broke...
( dont know why it turned into bold lettering)
I bet a 20hp 2 stroke, could run circles around it.

as for the Bold Lettering. Highlight them, then Click on that 'B" above, next to the Slanted I
 

Chris1956

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Mar 25, 2004
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Gee, oil will not mix well if it concentrated in the bottom of a fuel tank. It mixes very well if the tank is mixed a few gallons at a time. So figure out how many gallons your fuel tank will take, error margin is 3 gal. Let's pretend you think the tank has 24 gallons to be filled. Divide the expected fill gasoline volume into steps. So dump a qt of oil and add 12 Gal Gasoline. If the tank looks like it can take another 12 Gal, dump a pint of oil into it.. If not, if it can take 6 gal, dump a pint of oil. After that 8 oz for 3 gal of fuel. You can get it real close to a 3 gal variance
 

ahicks

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They lack the Torque for Acceleration that the old 2 strokes had. Maybe that is why people are now asking if 150hp is enough to pull a Skier, on a 16 ft boat...

I have probably been propping boats long before you were born
Torque: though you are certainly entitled to an opinion, my experience would be totally different....
Re: my age - I doubt that seriously sir....
 

ahicks

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I bet a 20hp 2 stroke, could run circles around it.

as for the Bold Lettering. Highlight them, then Click on that 'B" above, next to the Slanted I
OK, so let's keep it relevant. Apples vs. apples. Show me a 2s 20hp that'll push a 20' pontoon into the mid to high teens typical of a 40-50 4 stroke......(brand not relevant) Hint, there isn't one......

Clearly you have no experience here, and you're up for a nice surprise when you "discover" the truth here....
 

jimmbo

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OK, so let's keep it relevant. Apples vs. apples. Show me a 2s 20hp that'll push a 20' pontoon into the mid to high teens typical of a 40-50 4 stroke......(brand not relevant) Hint, there isn't one......

Clearly you have no experience here, and you're up for a nice surprise when you "discover" the truth here....
Do not like 4 stroke outboards. Every one I have been on, is slow as Molasses, and A 2 stroke would have across the Lake and back before the 4 stroke got up on Plane. I used to think I/Os were slow accelerators, but they beat the 4 Stroke Outboards
 

909

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Jul 19, 2021
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Don't understand where this hate for 2 strokes is coming from.

They're lighter.
Have more torque and top speed.
Less moving parts.
Cheaper to buy, repair, maintain and easier to fix.

No, instead get something heavier, slower, more expensive and complicated to fix & maintain.
 
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