I guess you could run the 2025 from a relay and a boost switch, and if you ever upgrade the ECU you could add the regulator and be done. I tried several other brand pumps and regulators, none work as well as the Weldon. Why not turn the fuel pressure up and back the pulse width down.

I clamped off my return line yesterday and ran it WOT for a short burst. The pump could not keep up with the pressure at WOT. Fuel pressure at an idle is real eratic also.

Looks like I need a new pump for the port motor. It also seems that Mercruiser has a newer version of the high pressure pump and cooler for the cool fuel system and you can't just replace the pump any more. I am having a hard time finding one in stock anywere.....

Its best just to toss the cool fuel setup and stock pump if your running it,put a fuel cooler on that uses regular fittings and a real pump. My stock fuel cool adapters and crap were a cobbled nightmare.If your using a stock pump( i thought procharger gives you a aeromotive pump with all their set-ups) i have one off a 2000 mpi you can have if your intent on running one,Smitty

For the 350 mpi kit the cool fuel setup is supposed to be fine, it is for one of my motors and not the other.

I would love to have yours if I can. What motor was it and I will check and see if the part numbers are the same.

Thanks
Brian

The fuel pump was a stock one off a 2000 502 mpi,i doubt its the same as a 350 but find out and let me know,Smitty

Looks like they are the same part number. I will pay you for it.... Let me know what you need. I am worried that the local marina won't get me a new one in stock by the weekend.

I also found some 98-99 service bulletins named:
Electric Fuel Pump Check Valve Sticking
EFI / MPI Fuel Pumps With Low Pressure

Does anyone have access to look these up? Or know where I can look them up?

Brian

I found the service bulletin information already, basically replace the pump is the answer.

Fuel Pump Questions Call Kinsler. ( 248)362-1145 They can make custom Weldon Pumps by mixing electric motors and pump housings. Not all Weldon pumps are for constant duty.(ie. drag racing)They flow test the pumps before they go out. My Weldon 8850-10E flows 20 psi--746lbs @ 12.2 amps
50 psi--699lbs @ 14.4
70 psi--677lbs @ 15.6
100psi-- 628lbs @ 18.1
120psi-- 604lbs @ 19.8
I run 72 inj start @ 60psi base and max out with 1:1 ratio @ 76psi. The pump is fine for over 1000hp @ 100psi.
Big pumps draw a lot of power. Check your wiring, make sure it is over sized and your charging system/battery is up for the drain.
Be carefull your injectors are not made for high pressure and may static flow on you.

Give me a ring on phone w/address and I'll drop it in ups tommorrow,you can just pay the s/h,pump was in boat 1 month from new before i converted to procharger,Smitty

Smitty,
You have a paypal account? I will shoot you some cash for shipping and an address.

Brian