H.P. of an EFI500
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Can anyone confirm that the horsepower of a 2000 EFI 500 is 470? This is for insurance purposes. I was under the impresion that they are 500 at the crank. Thanks.
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Looked in one of my 500EFI owner's manuals, (publication # 90-840175001 999, copyright 1999 Mercury Marine). Specifications, page 61: "propshaft horsepower --- 470 HP". In my Mercury Racing Service Manual, Number 6, "Mercruiser Hi-Performance GM 500 EFI Engine", publication # 90-840283, July 1999, its listed as 415 HP ... obviously thats a misprint.
Last edited by bob_t; 10-02-2010 at 07:06 PM.
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Another reason, I think why merc racing would not rate prop hp, is that a 525 with a ssm 6 would have a different prop hp than a bravo setup. So it does make sense, so rate them at the crank. I have no confirmation on this, but it seems like a plausable idea.
The 500hp and efi is 470 on the prop. Other examples for past motors are
Bulldog @ 470 prop
525sc @ 490 prop
575sci @ 550 prop
600sc @ 550 prop
800sc @ 700 prop
900sc @ 850 prop (dry sump six)
Sorry for the hi-jack.
Last edited by A.O. Razor; 10-15-2010 at 06:57 AM.
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For all practical purposes , How would you look at it on a NADA value??
Nada has an option for an adder for additional horsepower
the option is 415 to 470 H/P or 471 to 500 h/p
what would be used for the 500efi?
Its good for insurance purposes i guess that Merc rates them at prop . But the rest of the world in every market rates it from the flywheel.
Nada has an option for an adder for additional horsepower
the option is 415 to 470 H/P or 471 to 500 h/p
what would be used for the 500efi?
Its good for insurance purposes i guess that Merc rates them at prop . But the rest of the world in every market rates it from the flywheel.