Beech2000
Active Member
- Jul 11, 2015
- 253
- Boat Info
- 1990 Sundancer 350
- Engines
- 2020 454 gen VI
Hurth V-Drive's
7.1 KW Kohler 5ECD
While dressing my new long block Generation 6 L29's. I have come to some electric fuel pump wiring questions. Some will find this easy to answer.
As you may or may not know, The Generation 6 454's do not have provision for mechanical fuel pump. So I am forced to safely wire in an electric carter pump as an alternative to the mechanical pump my boat was built with.
I read about applying power to the pump in two ways.
1) While starter is powered up and engine rotating power is applied to the carter pump during starter engagement. How is this done specifically? My key switch appears to complete the circuit to a starter solenoid on the front of the engine. Where would I connect the pump for power here at? Wire colors are yellow and red stripe.
2) I know the importance of an operating engine with fuel pump powered up. Knowing this; I have installed a two wire normally open oil pressure switch p/n PS126 (standard) which will complete a circuit with positive oil pressure above 5 PSI or so. How would I wire this switch? Ground or positive to complete circuit keeping in mind requirement for running pump with starter powered up from key switch.
Thinking out loud... 5 PSI is almost immediate so do I even need to complete the circuit with starter engagement? My thoughts are so long as engine is in rotation; pump should be running. Help me to understand the right way to wire an electric fuel pump using a two wire normally open pressure switch which completes a circuit above 5 PSI.? Thanks
As you may or may not know, The Generation 6 454's do not have provision for mechanical fuel pump. So I am forced to safely wire in an electric carter pump as an alternative to the mechanical pump my boat was built with.
I read about applying power to the pump in two ways.
1) While starter is powered up and engine rotating power is applied to the carter pump during starter engagement. How is this done specifically? My key switch appears to complete the circuit to a starter solenoid on the front of the engine. Where would I connect the pump for power here at? Wire colors are yellow and red stripe.
2) I know the importance of an operating engine with fuel pump powered up. Knowing this; I have installed a two wire normally open oil pressure switch p/n PS126 (standard) which will complete a circuit with positive oil pressure above 5 PSI or so. How would I wire this switch? Ground or positive to complete circuit keeping in mind requirement for running pump with starter powered up from key switch.
Thinking out loud... 5 PSI is almost immediate so do I even need to complete the circuit with starter engagement? My thoughts are so long as engine is in rotation; pump should be running. Help me to understand the right way to wire an electric fuel pump using a two wire normally open pressure switch which completes a circuit above 5 PSI.? Thanks
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