Johnson Mile Master Fuel Tank 6U.S. Gallons

[ddmopowar]

I have just bought my first boat and am in the process of going thru everything. In draining the fuel tank I came accross about a cup of grit. Having never dealt with fuel tanks before I come here before I started tearing it apart to get the do's and dont's. such as what kind of material should I use to replace the gasket, should I put some kind of sealer on the inside of the tank any other pertinate information would be appreciated.

 

[angus63]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

Neoprene gaskets seam to hold up well in a gasoline environment. There is teflon tape made special for gasoline that is available, but I've used the regular stuff without issue. Also for sealing small leaks, I've used a product called Marinetex that holds up real well. Use gas to flush out the grit (rust?) and try to keep the tank full and capped to prevent this is the future.<br />Good luck

 

[C-RAVEN]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

For about $25.00 us you can buy a new plastic tank<br />that you won't have to worry about for years<br />Most marine stores have them. (believe brand name is Tempo)

 

[Paul Moir]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

ddmopowar - are we talking about an old pressure (2 line) tank here or a single line?

 

[ddmopowar]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

Paul Moir, it is a 2 line pressure tank

 

[Paul Moir]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

Throw a handful of nuts and small bolts in the tank and some carburetor/tank cleaner. Shake vigurously to clean the tank and loosen off any flaking rust. Repeat until clean.<br />You can still get pressure tank rebuild kits from Laing's:<br /> Laing's outboards, look for the heading 'Fuel Tank Repair Kits for double hose tanks'<br /><br />He's got the line and connector parts right below it. I think you'd be a lot better off getting the kit than trying to track down and make your own parts. Leave that for necessities.

 

[alcan]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

I totaly agree with paul. Everyone has there bag of tricks for cleaning tanks. It has been my expirence that most of the rust one sees on the bottom of these tanks came from the top (where you don,t see). this rust sort of falls to the bottom and help from a rusty looking shelacy type spuz. along with the nut&bolt, BB shot thing I also like to use a toilet type brush and naval jelly. This allows me to get at most of the rust at the top. There is also a product for cleaning and resealing motor cycle tanks called Kreem or something to that effect. it works well. Do not use this product to seal leeks. If your tanks leaks find another. The seal just seals the crud in the tank so it don't get loose. Be sure to use common sence and wear safety equiptment goggles, gloves,etc and work in a well vented area. Do not forget to rebuild the fuel line connector, you will want to replace the o-rings in it. You can't use a plastic tank in your case. Just as well, in my opinion they ain't worth a dam. Do not cheep hoses and connectors either. It is a false ecomomy. Causes way more problems than money saved. You just end up buying the good stuff any way, might as well get it right the first time.

 

[G DANE]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

Have to second Paul and Alcan, got OMC fuel hose and original replacement orings. The cheap hoses stiffen up and the orings crack, causing lots of irritating issues. Good to hear from you again Alcan, thanks for the help with my 35HP rebuild once, I got it running good, sold it, the guy who has it now puts lots of hours on it every year - great.

 

[WillyBWright]

Re: Johnson Mile Master Fuel Tank 6U.S. Gallons

The rust concerns me. Considering that it has to hold pressure, the rust means the metal is weaker than it used to be. If it ruptures under pressure, gas will spray all over the place. It could be a ticking time bomb. You might shop around for another. They're kinda rare, but they're still out there. Many have that same problem however.<br /><br />You might consider converting to a fuel pump system. It's not difficult if you can find a place to mount one. To use a small square pump you'd have to make your own mount. It wouldn't take much. There are larger pentagonal versions with a fitting for a pulse hose. I had a 1970 50Hp that had a pump like that. The pulse hose off the motor would be the tiny fitting that the pressure hose fits onto. Behind that there is a small reed valve. That would have to be removed. You need to take the intake manifold off to do it, but it's not a bad job. If you decide to go that route I can help with the procedures. The small square pumps would work on anything smaller than the 25 Big Twins. For the 25s, 30s, and 35s I'd use the pentagonal one.