Permanent or Portable Gas Tank with Mix Fuel

izoomie

izoomie

Petty Officer 1st Class
Joined
Oct 16, 2009
Messages
274
Hi All;

I have a 17' Prince craft with a 1988 90HP Johnson. The VRO pump was removed before I bought the boat.

I have two 6gal portable fuel tanks that I lift out of the boat to fill, and that is proving to be quite a pain. There is lot's of room to fit a 14" wide larger tank in storage compartments on both sides of the boat, but of course I will not be able to remove a tank this size to fill. There is the added mess of mixing the fuel.

Does anyone have a permanently install gas tank with mixed fuel, and how does that work for you?

Do you have to pre-mix the fuel and somehow transfer it?

How do you measure the mix, if the tank is partially full?
 
R

robert graham

Admiral
Joined
Apr 16, 2009
Messages
6,908
Re: Permanent or Portable Gas Tank with Mix Fuel

I run the red plastic 12 gallon gas tank in the back, it is called "portable", but nobody can pick it up full of gas, so it just sits there. Then I use 2-6 gallon red plastic "jerry" cans to mix and fill the 12 gallon main tank. I can handle the 6 gallons fine and put the oil in each one before I fill it up. The transfer of gas from the 6's to the 12 also makes for very good mixing of gas/oil/Ringfree/Stabil that I use all the time. When we're on the river we have 24 gallons of gas total on the boat, but we run fairly far down the river where there aren't many Marinas and I hate that queazy,"I wonder if I've got enough gas" feeling. So far, so good!
 
Silvertip

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Permanent or Portable Gas Tank with Mix Fuel

Mixing fuel for a permanent mount tank is no different than for a portable. The issue is that you can't see how much fuel is in the tank but that really doesn't matter. Here's the trick. 50:1 mix is 13 ounces of oil in 5 gallons of fuel or 16 ounces in six gallons. So if you know the tank will take at least six gallons, just dump in a pint of oil. If you are unsure about six but sure about five, dump in 13 ounces. If you are really unsure, use the the 3 gallon rate (8 ounces for every three gallons.) The sequence goes like this: Pump 3, 5, or six gallons and dump in the appropriate amount of oil. Then repeat but as you approach full, use the three gallon rate. Don't worry about actually mixing the oil. By the time you leave the driveway at the gas station the oil/fuel will be mixed.
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Permanent or Portable Gas Tank with Mix Fuel

safety wise, i do not like tanks where the fuel hose has to come inside the boat. i have one 30 gallons, just waiting for a fuel spill on board.

i have had many boats with built in tanks, and had to mix the oil. just as Silvertip said.
 
H

Home Cookin'

Fleet Admiral
Joined
May 26, 2009
Messages
9,715
Re: Permanent or Portable Gas Tank with Mix Fuel

Silvertip, I put oil first then gas so that if I misjudge, I'll be rich rather than lean. But after a while it won't matter.
In his case, premixing in the jerry can might make better sense.
Does that boat have room under the floor for a belly tank? or a 12-20 in the center console?
 
Gary H NC

Gary H NC

Fleet Admiral
Joined
Dec 1, 2005
Messages
8,972
Re: Permanent or Portable Gas Tank with Mix Fuel

On my 90 gallon belly tank i still do the quart of oil to 12 gallons.
After you do it so many times i can judge it real close by the gas gauge.

A full tank will last at least 3 days on the lake for what we do.
Come on Spring! She is full and needs the cob webs blown out..:D
 
L

lckstckn2smknbrls

Lieutenant Junior Grade
Joined
Sep 18, 2008
Messages
1,114
Re: Permanent or Portable Gas Tank with Mix Fuel

I have a 12gal tank under the front deck of my jon boat. I use a wooden ruler to see how much fuel is in the tank.
 
B

bob johnson

Rear Admiral
Joined
Feb 25, 2009
Messages
4,306
Re: Permanent or Portable Gas Tank with Mix Fuel

well if you are gonn ahve a 90 gallon tank in a boat the middle of the boat is the place to have it, other wise your performance will be all over the place!!!

I know it is a pain, but if you establish a seperate contailer that pours easy and fills easy you could pump your gas and put your oil in that out side ont eh ground next to the pump..., then transfer it to your tanks as needed.

I dont like refilling gas tanks from gas cans out ont eh water,...there always seems to be mishaps and spills.

I bought 2 portable 9 gallon tanks that slide into storage compartments on the face of my decks... I can pull them out and lean over the gunnel and fill them..then twist them so a corner comes up in the air, and slide it till it catches on the edge of the opening and then level out and slide in...i never have to lift the whole weight of the tank...

I like portable so you hav that extra option ofeasily getting rid of bad gas.. and or changing out the tank itself

bob
 
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