Thread: Flow pressure for mechanical fuel pump?

Probably about 3 psi.

Why would youreplace the mechanical pump with an electric one? My experience has been that electric ones give far more trouble.

I looked at the S2a manual, and had no better luck than you. the best I found is that the S2 diesel mechanical pump must deliver at 5-8psi, and I know that the pump in the petrol engine is about 50% of the pressure in the diesel, so perhaps you could work from there.

There will be few if any modern pumps that don't deliver at a high enough rate, as the engine's demands are fairly modest by most current standards. The problem will be to ensure you don't have excessive pressure - this will cause flooding.

John

Thanks JDNSW, am dipping a 'toe in the water', on this one, just thought an electric pump might do the trick, but you seem dead against it, Thanks for your advice, Ben.

Originally Posted by LandyBen

Thanks JDNSW, am dipping a 'toe in the water', on this one, just thought an electric pump might do the trick, but you seem dead against it, Thanks for your advice, Ben.

I don't have anything really against them - but the mechanical pump performs satisfactorily in most cases, so why replace it with something potentially less reliable? If it has a problem, fix it.

As a temporary fix to tell whether the fuel pump is the problem, trying an electric one could be worthwhile.

John

8psi against a full stop and about 3l min on free flow

the normal ticker type electric pumps from supercheap autopro/anyother autoshop (the ones that look like a transformer block with a pair of pipe fittings on them) are just the ticket.

Cheers, thanks Dave. Ben.