CORRECT FUEL PUMP FOR DISCO 1, 3.5 ON CARBS - CONFUSING!!??

I have the fuel tank out on my 1990 Discovery 1 3.5 carburettor model to get at chassis for welding. The fuel pump on the top at least looks pretty bad and the connections were difficult to release. I’m thinking to change the pump while it’s out there is a confusing picture on possible replacements. Best as I can find out the correct pump is part number PRC7129 which is rather expensive, around £150 to £175. Some of the aftermarket suppliers Britpart pumps for Discovery 1 which are a lot cheaper, around £70, and they looked exactly the same except for the electrical connection, the one I have is a cable coming out of it whereas other ones have a socket for a cable to plug in. Pump and send the unit are simple wiring so I’m sure a conversion is possible.

The body had the experience of replacing one of these pumps with non-standard near so what did you use please?

Pictures of existing pump below the minor

lrjohn said:

they looked exactly the same except for the electrical connection, the one I have is a cable coming out of it whereas other ones have a socket for a cable to plug in

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As long as the socket on the pump has the same shape and pinout like the female plug on the old pump's cable and it accepts the vehicle's male plug which can reach the socket it should be plug and play even though rewiring such pump is not something hard to do

sierrafery said:

As long as the socket on the pump has the same shape and pinout like the female plug on the old pump's cable and it accepts the vehicle's male plug which can reach the socket it should be plug and play even though rewiring such pump is not something hard to do

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Thankyou for your response. Do you know if the pump used on a fuel injection Discovery 1 and carb version are the same in terms of fuel delivery and return pipe?

lrjohn said:

Do you know if the pump used on a fuel injection Discovery 1 and carb version are the same in terms of fuel delivery and return pipe?

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Sorry, i have no ideea

lrjohn said:

Thankyou for your response. Do you know if the pump used on a fuel injection Discovery 1 and carb version are the same in terms of fuel delivery and return pipe?

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Different part numbers for a start, plus the EFI’s have around four variations over the years, so in my experience I would say no.
My quick search gives the part number you gave as a 200Tdi pump, you need PRC9409 pump for the twin carb V8, which appears to have the correct power connector. Pic below.

I would expect the genuine pump would be obsolete by now, but it appears that the OEM pumps are manufactured still,which Britpart can supply, possibly along with a genuine pump if the had one.


Just to add , I looked in my parts book now i’m home and it gives a number as PRC7128, PRC4909 is for 93 disco EFI and that is expensive.

The fuel injection pumps have way to much pressure. An alternative would be a Red Top Focet pump. Those are inline so, I have one in the engine bay on a 3.5 carb RRC. Works great. Not sure if that setup works on a Disco 1, it should so, as the underside is basically the same thing. Not sure about the tank.