Tired of mechanical fuel pumps

[Floatation Device]

Have a 96 sundance 330 with twin 454's. Tired of mechanical fuel pump failures. How do I switch to electric pumps? What pumps do I need?

 

[Docksidemarineservices]

First, why are your mechanical pumps failing? Lack of lube?

 

[Floatation Device]

Learned about lube after the replacing the first set. On the 3rd set or 4th after 5 year. Believe diaphrams are failing. Can't see any gas in the return line. I keep a spare, so when I put it on, no issue for a season. Add additive to the fuel when it sits. Do burn 10% ethanol.

 

[guyjg]

Do burn 10% ethanol.

Stop using it and you may solve the failure issue...it softens the diaphragm to where it won't flex.

 

[RicardoMarine]

If you were to switch to the electric fuel pumps, don't forget that you must have a low oil pressure disrupt, or cut-out circuitry installed.
The Regs require that if the engine was to stall out, the fuel pump power must be interrupted.
The assumption would be...... a breached fuel line, for example, whereby the engine may stall out, but the fuel pump would otherwise continue to operate.

This also creates the need for a start-by-pass circuit, or a momentary helm switch that would power the fuel pump prior to oil pressure.


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