1997 Mercruiser 5.7 Electric Fuel Pump Conversion

[300sflyer]

Need a bit of help guys. I understand needing the oil pressure switch to control power to the new electric fuel pump, and tying it in to the starter circuit, however this starter only has 2 terminals instead of 3. How can I work around this and still have power to the pump when the engine is cranking? Thanks!

 

[Lou C]

You could install a solenoid with the correct # of terminals. What you have is the 3 terminal style but what you need is the 4 terminal style.

 

[alldodge]

Like this

 

[300sflyer]

The oil pressure switch included with the kit, only has 2 terminals instead of 3. Guess I need to get a replacement? Where would I find one?

 

[alldodge]

For safety yes, need 3 pin

 

[Scott06]

The oil pressure switch included with the kit, only has 2 terminals instead of 3. Guess I need to get a replacement? Where would I find one?

Oil Pressure Safety Switch

Oil pressure safety switch Thread size: 1/4-18 Terminal type: 1/4 in. spade

michiganmotorz.com

 

[300sflyer]

Saw that one. The Carter A68301 switch has 1/8NPT threads so I won't need an adapter, and it has better reviews as well.

Thanks for your help guys!

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