I'm working on a 540 (548) all refreshed, with a wieand 256 supercharger (dual carb set on on top, Holley blower carbs)
There is a mechanical fuel pump on top of the raw water pump, I believe it is a stocker (and it was on it prior to the rebuilds so it ran that way for some period of time) root cause of failure was a valve dropped into the cyl
the blower pressure is 4lbs ish (not huge boost)

Heads Are grumpy jenkins
Cam jb300 erson
And the engine is stroked...4.25 crank

The combo seemed to work well

Which fuel pump should I be using, I was told that I would need to go electric, I would believe I could get a mechanical that would support it and not have to redo the plumbing

I was told that these engines had alot of hours on them (I also know that they came from a sonic some years ago maybe built in 96 in the past perhaps somewhere on the east coat prior to transplant into the boat that I'm working on now)

I've never used one, but......

http://www.cpperformance.com/p-12460...6-engines.aspx

I have a super charged engine and I went to an electric fuel pump. I installed an aeromotive one and it works great no problems

I sold tigerweldsm a keith eckert mechanical pump that is specifically for that app. They run about $250 new with adapters shipping ect

Just take any Holley pump that screws together and use the bottom half with the mercruiser top half. Works great

I have one of the KE's for sale in the swap shop

whats the P/N?

Cv makes a mechanical pump goes right to your see water pump that's a what I use

personally I never cared for the merc water/fuel pump combo, prefer something like a aeromotive A1000

there is only 1 battery in the boat, and really dont want to re-plumb the system, so at this point electric is out, as they eat 10 amps combined while running (real world amps)