Is this just a lift pump for an electric fuel pump? Or is it regulated to run a carburetor off of? I show's it will run off a sea pump from 525EFI-799SCI. Need a sea pump fuel pump.
https://www.mercruiserparts.com/889275t-pump-assy-fuel
Thanks

Would need to know what motor, but

You want 861677T
https://www.mercruiserparts.com/861677t-pump-assy-fuel

or Airtex 60932 which makes the pump for Merc

Merc has these pumps done over in Korea if I recall correctly. Its fits the 525 hp and some other models as a boost pump to feed the high pressure electric fuel pump.

Yes, have one on my Rinker (carb) and use to use one on my Formula (502 MPI VST) prior to the repower (509 MEFI3). Bolt and go

The Merc pump is an Airtex? The reviews on the Airtex are hit and miss. I believe mostly due to the rotation of the outlet. I believe it can be clocked differently by unbolting.
The engines are NA 502's Will this pump support 600HP NA?

Ive got a pair of sea pumps if you need them

As a non-expert in the design of the pumps, I'll say they pump the same amount as the Merc OEM. So if the OEM work, then they should also. Normally these pumps will pump more fuel then the motor will consume

I'm running a Gen 2 cool fuel (530hp) without a mechanical pump in front and have no issue, and also the pump moves more fuel then my motor will use