For those with electric fuel pumps only

Bt Doctur

Super Moderator
Staff member
I`ve found that the replacement switch unit by mercruiser may only work with a relay system and not as a actual switch. I`ve started using pressure switches by Standard . part numbers are PS126, and PS127. They use the 1/8 pipe thread
One has 2 switch terninals (copper)and a ground lug (silver)should you wish to carry both the hot and ground for the fuel pump, the other has only 2 switched lugs(copper).If I havent mixed then up PS126 is the 2 lug.
and there cheaper .
 

waybomb

I'd rather be blown
BT, is this a NO switch? So, when oil presure drops, it opens? At what PSI does it open?

Not familiar with the electric only fuel pump system.

Thanks
 

Bt Doctur

Super Moderator
Staff member
What I saw in the book had it listed as 3-7 psi to close, allowing a pump to run.
 
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