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MG TD TF 1500 - Emergency fuel pump usage?

Being in a blizzard yesterday I decided it was a good day to investigate the emergency fuel pumps I seen in the archives, Ttalk, etc. (the ones that use a blood pressure bulb). Seems like a good thing to have along this summer. A few questions:

When in use, should the regular fuel line to/from the electric pump be left in place or perhaps bypassed? I'm curious how the fuel makes it's way through this pump's diaphram, etc. when using the bulb? Wouldn't the diaphram stop the flow at that point like it does when it is working properly? And should the power to that pump be disconnected for any safty reasons when the bulb is in use?

When in use, how does one know when the bulb needs another squeeze? I assume just trial and error till the bowls go empty and you coast to a stop?

Sun is peeking out. Powder day!
Thanks much,

efh Haskell

The elecrtric fuel pump does not need to be disconnected,,,, The fuel will flow past the diaphram,,, it does not flow through the diaphram,,,

The only way to tell if you need to pump it more is when it begins to give you the symptoms of running out of fuel...


There is an inlet valve, and an outlet valve,,, as the magnet pulls the diaphram back, the suction causes the inlet valve to open, and the outlet valve to close,and fuekl is drawn into the pump,,, as the diaphram moves in the other direction it pushes the fuel, and the inlet valve is forced to close and the outlet valve is forced open and the fuel flows to the carbies,,, W

When using the hand pump, the fuel is pressurized befor the pump, and is pushed through the inlet valve and also through the outlet valve,,,
Do a search for su pump diagrams, and you will see how the fuel goes by the diaphram and not through it,,,


Emergency Fuel Pump

As described in the February 2000 Sacred Octagon.

"A couple of pumps every 10 to 15 minutes and you can drive forever. If your tank is half full, pump less often. If itís full, pump more often. You only want 2 Ĺ to 3 pounds pressure. More could cause flooding or the carbs to overflow. This is a safe and easy solution to pesky fuel pump problems and allows you to drive indefinitely with this device in place."

I fitted my emergency fuel pump with a "T" fitting and an inexpensive pressure gauge I found on eBay.

Make sure your stopper makes a good seal to the top of the tank.

Larry Shoer

Thanks guys for the input! Cheap insurance...I'll be getting one together before spring. Who needs Lucas?!
efh Haskell

Ed, see for my version #2. It has a sphygmomanometer gauge connected to allow you to see the pressure in the tank. Anything over .5 psi is more than enough. Bud
Bud Krueger

Looks like:

Bud Krueger

To answer your original question about the "Stewart Locke Armstrong" Emergency Fuel Pump:

Easy to use, Easy to install, Also works on MGA's and early MGB's

Pump up until it runs smoothly. then 8 to 10 pumps when it sputters.
You can easily get by without the pressure gauge, but it helps.
I found some @ $2.00 on ebay,

It got one of our members on tour 175 miles to our next stop in Savannah, GA
Don Harmer

FYI, see for a look at the article that Don's referring to. The rubber stopper is inconvenient to buy in one-zees. I have a few on hand and I'll that I'll gladly send one off to anyone interested in putting one together. Bud
Bud Krueger

Bud, you have email.
efh Haskell

>>"The rubber stopper is inconvenient to buy in one-zees"<<
I was able to buy one at my local non BIG BOX hardware store,,,,



After having a pump failure in a remote location I made up an emergency pump based on one that a fellow "Pre56 MG Unclub" member made. I have tested it to ensure it works and now carry it in the tool box. It is simply one of those cylindrical low pressure electric pumps with a plastic body that can be hooked up without worrying about polarity. I have two hoses, one on the inlet side with a fitting that goes to the old pump and the outlet goes to the carb, again with the correct fitting. A spade terminal hooks it to power and another to ground. Simply use a spanner to remove the fuel line from pump to carb, fasten this pump up, connect the wires and you are good to go. Takes only a couple of minutes and will get you to where you are going and home.

Like I say, I copied another club members idea and it is simple and easy to carry along.

Brian Smith (1950 TD3376)

An advantage of Stewart Locke's technique is that it doesn't require any tools or wiring and only takes a couple of minutes to have you up and running. Bud

Ed, your stopper's on its way.
Bud Krueger

This thread was discussed between 29/02/2012 and 01/03/2012

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