Check valve for pressure line

[Harald1966]

There is one thing that is very annoing. When you lift the nose of the boat to drain fuel and oil out from tuned pipe, what happen is that you also drain the tank.

Is anyone selling a check valve to put between pipe and tank to avoid this?

Another thing, my 4 year old handheld fuel pump will not such fuel unless there is some liquid in it. Is there a quick fix?

 

[carlnoki]

Harald;

I use a Dave Brown six shooter fuel pump. It works great.

And as far as fuel draining goes, get a pair of surgical forceps and clamp the pressure line off when you tilt the boat when you drain the hull.

These can be purchased from Harbor Freight. Real cheep.

Carl

 

[camaroboy383]

the check valves do exist,,,, you can buy them from tower hobbies..... i personally have used them and didnt like them... the pressure retension is huge to the point the tanks will bulge excessively.. also causes needle issues with throttle transition,,,if you chopped the throttle it loaded the engine massively.. these are my personal experience with them and obviously also just my opinion... i beleive the targeted market for them was air planes... im not sure who made them,,cant remember,,, but tower for sure has them....

i think carl has the right idea...

alden

 

[Ron Olson]

There are some one-way valves that the heli guys use but I've heard that they're not too reliable. The forceps idea is a good one or anything that has mild clamping.

 

[tnrcboatracer]

INstead of forceps, I use a plastic vascular clamp or Hemostat. Metal forceps can cut the line.

 

[Hydro Junkie]

I just have two questions:

1) If you have a one way check valve in the pressure line, how is the air going to vent back out when you refill the tank?

2) Is your vent tube at the top of the tank? Are you filling the tank before you dump the pipe? I'm still trying to figure out how you're dumping fuel while dumping out the pipe

 

[D-7]

We using in europe many times the valve from SKODA CAR`s, never problem with fuel or oil, it´s very light and cheap.

You have to order only the "orginal" from Skoda, all other doesn´t work correct, here is the order number.

6U0955969

cost ~1,-€

 

[Nigtmare]

you can get this valves in some LHS. I have used one and it is not good for our boats!!!

every time the boat stalled out in the water, it will drain the fuel tank rite out by the time you get to your boat It builds pressure in the tank and it has nowhere to go when the engine is not running so it drains trough the carb

Nick

 

[D-7]

We using the valve together with a float system, for mono and multiracing boat´s.

 

[Harald1966]

We using the valve together with a float system, for mono and multiracing boat´s.

Thank you guys for all the pros and cons!

I didn't know about draining your tank thru the carb, but I could shut off by closing the needle with 3rd channel?

Frank, do you have a link to the floating systems? I bought a home made floating tank from a Russian guy at a boat event several years ago but it is too big/tall for my Delta Force 45.

I also need a bigger fuel tank for my Delta Force 45. Any links?

I will stop by Harbour Freigh next week. They got interesting stuff but poor service.

 

[HendricX]

Frank sells his own version of those floater tanks , they are OK.

To see a picture of a floater-tank .... hit the L I N K , and look at items 43 > 47.

These floaters have a brass 'swimmer' , the ones Frank sells have ball-shape plastic swimmer.

 

[Tom Foley]

There is one thing that is very annoing. When you lift the nose of the boat to drain fuel and oil out from tuned pipe, what happen is that you also drain the tank.

Is anyone selling a check valve to put between pipe and tank to avoid this?

Another thing, my 4 year old handheld fuel pump will not such fuel unless there is some liquid in it. Is there a quick fix?

Well .........you could always just pinch the line off with your fingers ..works great ????!!!!! :lol:

 

[Marty Davis]

There is one thing that is very annoing. When you lift the nose of the boat to drain fuel and oil out from tuned pipe, what happen is that you also drain the tank.

Is anyone selling a check valve to put between pipe and tank to avoid this?

Another thing, my 4 year old handheld fuel pump will not such fuel unless there is some liquid in it. Is there a quick fix?

Well .........you could always just pinch the line off with your fingers ..works great ????!!!!! :lol:

Tom:

Me too....

 

[camaroboy383]

totally forgot,,, they have little red clips that go on the line,, you simply snap it closed and it pinch's the tubing... they use them on rc trucks and cars alot,, so you can shut them down... tom does have a good point...lol..... but this will do the same without holding it... i know for sure traxxas has them....

alden

 

[D-7]

Here is pic from my float

Float.bmp

 

[Harald1966]

Thanks Frank!

How tall is it?

I would like to see a pic or three of how they are mounted in the boat?

Where do you place it?

 

[D-7]

Harald, here the pic´s, one from my mono and the other from multiracingboat

 

[HTV Boats]

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXG850&P=M

We have used these on some .21's that were difficult to hold fuel pressure and definately on our can muffler motors. BE CAREFUL when you fuel to simply disconnect the line or you build back pressure and may wind up with a face full of fuel. They may flood your engine a bit when it kills but does not empty your tank. Higher pressure but no higher that your motor will normally create, just won't let pressure bleed off at low speed and sometimes I think when you hit top RPM your pulse wave may not get into the return line as well. When our .21's killed in a corner after a long straightaway at WOT just adding this valve cured the problem. Good for long fuel lines, hopper tanks and tanks mounted low in tunnels. Worked for me anyway.

Mic

 

[ace]

frank hope kids dont download that float vavle there is asian porn on it cheers ace

 

[moparbarn]

never tried a check valve, but the way i stop fuel from running out is to unplug the fuel line between the filter & carb - at the filter, & unplug the pressure line at the pipe & connect them together. also seals the system between heats, preventing both evaporation & absorbing moisture. never been a big fan of clamping lines. fuel line cuts & splits too easily for me to be comfortable with it.