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  1. #11
    Registered LapseofReason's Avatar
    My Boats:
    98 NORTECH 5000V
    Join Date
    Jan 2003
    Stafford Va.
    I think the 525efi is about the same cost as the hp3 and they have closed cooling also. If I was to rank the motors the way I feel they are it would go 500efi, hp3, 525efi, and the 525efi is going to be easyer and cheaper to hop up later.

  2. #12


    you bring up a good point unlike some out there cost and resale are a consideration. does everyone still like the 525 EFI s ? and are they 502 or 496 blocks ?

  3. #13
    Registered Pure Energy's Avatar
    My Boats:
    2001 Superboat Y2K
    Join Date
    Oct 2000
    N. NJ, Eastern LI
    Excuse my ignorance, but aren't the HP500 and 500EFI 2 diff. motors. I thought the HP was a carb motor.

  4. #14
    Forum Regulator VIP Member Sydwayz's Avatar
    My Boats:
    37' Active Thunder AVH; 17' Speedliner Cat OB
    Join Date
    May 2001
    HP500 is carb, same block and internals as HP500EFI, which is just EFI. Both based on 502 block.

    I would go with HP525EFI from merc.

  5. #15
    VIP Member VIP Member JaayTeee's Avatar
    My Boats:
    2002 baja 33 o/l 575sci's
    Join Date
    Nov 2002
    The BLUE one's

    I was in the situation a few years back,
    I'm glad I did what I did

  6. #16
    Member #154 Platinum Member Indy's Avatar
    My Boats:
    Missing my PowerPlay
    Join Date
    Oct 2000
    SW CT & Long Island Sound
    I have the 496HO, I couldn't afford the upgrade for the 500, but I'm not happy with the 496HO from a power standpoint. If I had it to do over again, I'd get neither, rather have a 540 built for less money than the 500. Go with the 500 if price is not an issue.

  7. #17
    Join Date
    Oct 2000
    New York, NY - Manhattan BABY!
    500 EFIs, though the Vortechs or the 525 EFIs with the ITS system makes a compelling combination.

  8. #18
    Charter Member # 55 Charter Member Griff's Avatar
    My Boats:
    ..........32........... Active Thunder
    Join Date
    Oct 2000
    Originally posted by Lou502
    does anybody have the GM HP3 525 s if so I would like to hear about them. Sounds like a good choice .
    I don't think they are available to the public yet.

  9. #19
    Member #2 ....Jeeezz Charter Member cigarette1's Avatar
    My Boats:
    Toy Boat - Toy Boat - Toy Boat
    Join Date
    Oct 2000
    Kicked to the curb
    The closed cooling system and SmartCraft are pretty cool.

    And as far as resale, remember the 500EFI cost about twice as much for 75hp Will you really re-coop the difference

  10. #20
    Registered fatdaddy's Avatar
    My Boats:
    2003 Baja 33 Outlaw
    Join Date
    Jun 2002
    New Jersey
    When I ordered my 33 Outlaw, I went through the same question. The upgrade was a substancial amt. of $ so I went w/ the 496HO's and through in some extra $ for custom paint.

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