Hi Leo, Fitting an electric pump would certainly solve the potential problem of getting oil into the crank-case. Have you fully investigated why these presumably new pumps are leaking? Where are they leaking from? In general a decent quality lift pump should last anywhere from 1500 to 2500 hours. My MF 1130 parts book shows the type as having a glass bowl, six retaining screws for the upper body and a hook and eye type attachment for the diaphragm. Have you fitted a quality branded pump (AC-Delco for example)or ones from the 'cheap and cheerful' level of supplier. There will be a quality difference. Is it the diaphragm that is failing? If you replace the existing one with another pump it be well worth slackening the body screws and holding the pump lever at full lift while you retighten the screws. This will have the effect of loading the diaphragm equally and ensure its best life. Not even MF tell you to do this when overhauling a pump. Let us know how the others have failed.
If you go down the electric pump route you will need a pump that can deliver fuel at a pressure of between 5-8psi (.35 to .55bar) and one of course that will shut down when the system is fully pressurised and restart when the falls. Quick research shows that pumps range up to $350 or so. I'm guessing that a mechanical lift pump would cost in the region of $80-100. Ideally a metal plate of 3/16 to 1/4" to suit the port on the block should be made and sealed using a gasket. The pipes will then need to be modified to suit the pump ports. You will also require a fused electric supply switched on your 'ignition' key position. Let us know what you decide. DavidP, South Wales
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