Fuel Delivery Issues....

[HavasuDreamin']

I have a Mercury 2.5L XRi EFI (200 hp - 1992 model) that does not have an electric fuel pump. It is running on the old vacuum system whereby you pump the bulb and then the vacuum created by the engine pulls the gas from the tanks.

I just bought this boat last year. It is an Ultra 21 LX open bow. Decent size boat for the power. It has twin saddle tanks running to a tank selector valve. From there it goes to the water separating fuel filter and then to the engine.

I have had issues with the engine starving for fuel. Runs fine until you idle for a while. Then when you pop it on plane, it will die out. Pump the bulb again and it runs fine.

I have a holley blue fuel pump running 3.5 psi on my 19' tunnel / bridgeport combo. However, the bridgeport is a carburated engine. This set-up has always ran well for me.

My questions concerning the Ultra 21' are:

1. Should I install an electric fuel pump with regulator? Is there a better method?
2. What PSI should an EFI 200 be set at?
3. What fuel pump does everyone recommend?
4. How do I wire it so that the fuel pump turns on when the key is turned on to the auxillary postion?

Thanks.