13 replies to this topic

[Will145]

Hello

My Austin mini 25 started this morning with some choke, as i kept her running, she died then wouldn't start anymore, only turning over. A chap looked at it with me and said its most likely the fuel pump because as I was turning over the engine, nothing was entering the filter.

Now bare with me as I'm not the most mechanically minded person but how easy is it to change the pump? I assume its at the back of the engine under the air filter? I have bought a mechanical pump to fit but just want to know what I'm getting myself in for!

Thanks in advance

[nicolasbuyst]

normally your fuel pump is located in front of your engine in the middle. It's the component where your fuel line from your fuel tank runs too. If you pull out the 2 tubes and unscrew the bolts keeping it in place you pretty much have it out of there. But because it's located in such a bad position you probably will have some prob. getting it in and out. Watch out with the fuel leaking out of the tubes so you don't set it ablaze .

Hope this helps

[Alex_B]

its at the back of the engine if looking from the front, and check your oil, if the mech pump has gone it could have been pumping fuel into your oil system

[MiniFTW]

Its located at the back of the engine. It is a relatively simple job but it is in an awkward position. It is tucked down the back of your engine on the right hand side of your carb (dead easy to see as it has a fuel line coming in and out of either side) If you have an LCB center branch manifold like me it can be abit of a nightmare of a job as it gets in the way. There are two bolts that hold the pump on that need taking out. You will need new gaskets as well for when you put the new pump on. When you fit the pump you should feel the lever arm compress as it pushes up against the lobe on the cam. Probably looking at about 3 to 4 hours work all in. Check your oil as well just to make sure its not been contaminated.

Edited by MiniFTW, 01 July 2012 - 03:14 PM.

[Carlos W]

Is there definitely fuel in the tank?

[racingbob]

i just recently changed mine ok getting off

but getting back on was a nightmare

i have a LCB on, its getting the bolt back in nearest the clutch side

with keeping the gasket in tact, it was an awful job

took me 3 hrs. never been so frustrated

you may be able to get off from underneath if have access to a car ramp ??

[bmcecosse]

It's very unlikely to be the mechanical fuel pump - they are ultra reliable. Take the pipe off the carb and crank the engine over to see if any petrol comes out.

[Carlos W]

After checking to see if there is fuel in the tank!

Start simple

[bmcecosse]

Indeed!

[Carlos W]

It's because I am simple, and don't just believe the gauge!

[Will145]

Haha thanks for the replies guys, definitely fuel in the tank! I've got a mechanic coming to look as I will only end up making things worse!

[dklawson]

Watch the mechanic and if you have any questions don't hesitate to post them here.

As Roy suggested above, disconnect the fuel line at the carb, put the disconnected hose in a catch can and have an assistant crank the engine on the starter to see if fuel is flowing. If it is, the problem is likely to be a stuck float valve in the carb not the fuel pump.

There are complicated fixes to stuck float valves but the simple fix is... rap on the side of the float bowl with the plastic handle of a big screwdriver. The shock typically knocks the valve loose so the fuel can enter again.

[MiniElliott]

I think the OP said there was no fuel entering the filter, so there would be no fuel entering the carb. Are you sure you dont have a petrol leak in one of the copper pipes or rubber hoses ?

[dklawson]

If the float valve is stuck closed or the fuel pump is not pumping... no fuel will be moving in the fuel filter. Of course, a leak in the suction side of the pump plumbing would let air in but you would expect that under such circumstances that a mix of fuel and air would be seen moving through the filter. If there were a leak on the discharge side of the pump you would expect fuel to be pumping out somewhere which should be visible or at least something you would smell.