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-   -   How much HP can a original seawaterpump mounted fuel pump take? (https://www.offshoreonly.com/forums/general-q/359275-how-much-hp-can-original-seawaterpump-mounted-fuel-pump-take.html)

McNick 02-26-2019 04:55 AM
How much HP can a original seawaterpump mounted fuel pump take?
 
Anyone know how much HP/how many GPH a original mercruiser 454/502 seawaterpump mounted fuel pump can manage?

Griff 02-26-2019 12:15 PM
The same Merc seawater mounted fuel pump is used on the 454Mag thru the 600SC so should be good to 600hp.
I'd probably be conservative and not use it for more than about 550hp.

Griff 02-27-2019 01:30 AM
Originally Posted by ALL_IN! (Post 4674521)
600sci and 700sci same part number, so up to 700+ HP? But it's basically a priming pump for the electric pump.
The 600sci and 700sci do not use the same seawater mounted fuel pump as the carbed engines.
The 454mag thru 600sc carbed engines use part #861677T

Full Force 02-27-2019 04:45 AM
I had them with 600 HP 565's no issues but I would not go anymore then that

ALL_IN! 02-27-2019 07:35 AM
Originally Posted by Griff (Post 4674626)
The 600sci and 700sci do not use the same seawater mounted fuel pump as the carbed engines.
The 454mag thru 600sc carbed engines use part #861677T
Doh! You are correct, sir. I misread sc, as sci. Deleting my post to prevent confusion.
Terry


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