2 line pressure tank

[popsmazz1]

I read an article on how these old 2 line preesure tanks are dangerous, is this true?, if so how hard is it to add a fuel pump to a 1955 evinrude 15hp? I have run this motor in a test tank and all seems well, should I convert it? thanks , mike

 

[freddyray21]

Re: 2 line pressure tank

there are a dozen posts about this. I don't agree they are dangerous as imo they are not. I run them all the time on different motors. In fact the boat in this pic is being run off of one. The primary reason I would convert one over is that pressure tanks are getting harder to find in good shape and they are expensive. There is a sticky on this and a recent thread.

 

[tashasdaddy]

Re: 2 line pressure tank

the are no more dangerous, than the new metal tanks, and imho, less dangerous than the new plastic tanks. laingsoutboards.com has rebuild kits for the tanks. there are 2 types of tanks, call Jim, so you get the right kit.

 

[asdasc]

Re: 2 line pressure tank

ANY tank is dangerous if it is not properly cared for and maintained. Since most (all?) 2 line tanks are now 55 year old +, the odds of one not being in proper condition is greater.

I run one and have no issues with it. I should probably plan someday to rebuild the tank and replace the hose, but for now it seems fine. I am in the habit of loosening the lid to release the pressure when I am not using it, rather than storing it pressurized, but that is just common sense. I don't leave it sitting in the hot sun either.

 

[popsmazz1]

Re: 2 line pressure tank

I have 2 of them, both seem to work well, so should I just use them?

 

[freddyray21]

Re: 2 line pressure tank

if they work use them. nothing wrong with it.

 

[samo_ott]

Re: 2 line pressure tank

I use 2 regularly and have never had a problem...

 

[Chinewalker]

Re: 2 line pressure tank

By all means, go ahead and use them. As noted above, keep an eye out for leakage along the gaskets or o-rings, release the pressure when not in use, and make sure the hose is in good shape - and that means the ones inside the motor, too!
- Scott

 

[cc67]

Re: 2 line pressure tank

I have four of them and they all work fine. I do,however release the pressure when I put my boat away.

 

[Ricardo Furioso]

Re: 2 line pressure tank

I've rebuilt a couple of pressure tanks, and as long as you pay attention, it's not hard.
But before you go to all that trouble, it's a good idea, given the required pressure, to simply make sure your hose-to-motor fitting's o-rings are working.
It is smart, cheap, and easy to replace the two o-rings in your fitting. Actually it's only easy once you get the hang of it. You need tweezers to remove the old o-rings. And you have to fool around with them a bit to install the new ones, but it's not really hard.
I did my last rebuild six months ago because the old tank sprang a leak in its bottom.
So.
When you repaint or rebuild a tank, I highly recommend that you pay extra attention to priming and painting the BOTTOM of the tank.
People worry a lot about rust in the tank. But the tank has a very fine screen in the fuel uptake, and the carb has a filter for anything that misses, so I don't worry so much about flaking rust.
Just about my own flaking.
Thanks everyone for a great forum.

 

[54fleetwin]

Re: 2 line pressure tank

I have 3 of these and will be picking up 2 more tomorrow morning.

They are only dangerous if you spring a leak on the fuel side. If you have a leak on the fuel side, the entire tank of fuel can empty its contents into the boat. That would be dangerous.

I store mine with the caps loose. And when I get to where I am going by boat, I let the pressure out when I stop.

 

[1946Zephyr]

Re: 2 line pressure tank

I've had several old motors with pressure tanks and they have worked fine. Just make sure they are in good shape. If you should happen to smoke a ciggarett in your boat, just be careful where the sparks go and that goes with any kind of tank you use.

 

[samo_ott]

Re: 2 line pressure tank

Smoking in a boat with a regular tank would be more dangerous as it has a vent and thus gas fumes are present around the tank at all times. A pressure tank is sealed and no fumes present unless you crack the cap at the end. Long live the pressure tank... Oh wait... it's too late... dang...

 

[Super Sportster]

Re: 2 line pressure tank

Been a long time since I had a pressure tank but like most who have replied i never had a problem, they worked fine. My concern today would be today's fuel and the fuel lines. Can you get an alcohol resistant duel line hose?

I recently bought a '58 5.5hp Johnson cheap, no tank. Like everyone has said the pressure tanks are not cheap so I did the conversion. Followed the directions in this article: http://www.outboard-boat-motor-repair.com/johnson/Pressureized Fuel Tanks.htm It worked great, I had a fuel pump from a 10hp Merc laying around so I used it instead of buying the the Mikuni pump.

 

[1946Zephyr]

Re: 2 line pressure tank

Been a long time since I had a pressure tank but like most who have replied i never had a problem, they worked fine. My concern today would be today's fuel and the fuel lines. Can you get an alcohol resistant duel line hose?

I recently bought a '58 5.5hp Johnson cheap, no tank. Like everyone has said the pressure tanks are not cheap so I did the conversion. Followed the directions in this article: http://www.outboard-boat-motor-repair.com/johnson/Pressureized Fuel Tanks.htm It worked great, I had a fuel pump from a 10hp Merc laying around so I used it instead of buying the the Mikuni pump.

Love the old Homelite in your avitar

 

[learningasIgo]

Re: 2 line pressure tank

Pressure tanks get my vote too. I have two of them as well and i like them. I kind of consider them part of the nostalgia of having the old outboards. Just wouldn't be the same without 'em I guess.

 

[54fleetwin]

Re: 2 line pressure tank

Smoking in a boat with a regular tank would be more dangerous as it has a vent and thus gas fumes are present around the tank at all times. A pressure tank is sealed and no fumes present unless you crack the cap at the end. Long live the pressure tank... Oh wait... it's too late... dang...

I agree 100%

I kind of consider them part of the nostalgia of having the old outboards. Just wouldn't be the same without 'em I guess.

x2

 

[Super Sportster]

avitar

avitar

Love the old Homelite in your avitar

It's also runner!
http://www.youtube.com/watch?v=K3rbIbVl-qM

 

[SPK]

Re: 2 line pressure tank

Hello,
With interest I have read your info on changing o rings on the two line systems. Would you be kind enough to provide a little more detail about how you do it. I have two pressurized tanks and as yet have not had to replace the o rings but I am sure I will sometime. I would really like to know how you go about it without damaging the rather rare OMC fitting. Actually I bought my second tank just to have a spare fitting.
I am fairly new to the forum and to engines. I bought a 1958 Ad 12 Johnson 7.5 Seahorse in really nice shape. It came with a 4 U.S. gallon tank.
hope to hear from you soon.
Thanks so much.
Sean.
Ontario, Canada.

 

[samo_ott]

Re: 2 line pressure tank

SPK, search the forum as it's been explained many times before. And whereabouts in Ontario are you?