[FC] Electric Fuel Pump Shutoff Switch - Has anyone experienced this problem?

[Daren Kershaw]

There should be no connection to the starter. The safety switch merely only stops connection when the oil pressure drops. When you start to crank it takes  a little while (seconds) to register oil pressure, and so you don't get a completed circuit for a short time, but apart from that so long as it has pressure it should supply the pump with power. On shutdown of the engine the pump will continue for a short time while oil pressure drops and the switch shuts.

So wire power from the battery to one side of the oil pressure switch, and from the other direct to the pump. Then from the pump to earth.

You can put an extra push to complete in the circuit to prime the carbs before starting, if you think it is taking too long to crank up pressure and get the pump to start.

Hope that helps

Cheers,
Daren

-----Original Message-----
From: Corvanatics [mailto:corvanatics-bounces at corvair.org] On Behalf Of ROBERT WILSON via Corvanatics
Sent: 17 August 2017 21:54
To: corvanatics <corvanatics at corvair.org>
Subject: [FC] Electric Fuel Pump Shutoff Switch - Has anyone experienced this problem?

Hello All; 
  
Still experiencing a problem in trying to get my electric fuel pump to work in conjunction with the oil pressure cutoff switch (replaces standard oil pressure switch). 
  


    * Red lead from pump is connected to the "P"  lead  on oil pressure safety switch 
    * "S" terminal on safety switch is connected to "S" terminal on starter 
    * "I" terminal on safety switch is connected to a terminal on the fuse block that is hot when the ignition switch is in "on" or "start" position (wiring diagram shows it being connected directly to the ignition switch) 

I have confirmed that the starter and electric fuel pump both work. 
  
When I connect the wires/terminals on the oil pressure safety switch with a jumper wire, the engine turns over. 
  
I have purchased/tested two oil pressure safety switches and both present the same issue. 
  
According to what I have read online, there should be some sort of bypass in the switch that lets the engine crank before there is enough oil pressure. 
  
Could it be that I need to connect the "I" terminal directly to the ignition switch? 
  
I'm about ready to ditch the safety switch and wire the pump directly to the fuse block. 
  
Any suggestions?  I am hoping to get it operable for the Woodward Dream Cruise Saturday - I live 1/4 mile away. 
  
Thanks, 
  
Scott Wilson 
  
'63 Monza convertible 
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