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  1. #1
    LA3 is offline
    Join Date
    May 2004

    500efi's vs 502/500Hp

    Both Blue Motors.
    Which is better motor?
    More reliable?

    What are the issues with EFI's?
    What are the issues with 502's?

    What you would run if you could run either?

    Finally, has anyone ever heard of pulling 502/500 HP
    heads "just because" Merlin heads are better? I know
    Merlin has good products. But, doesn't Merc Racing put
    together a pretty good package.

  2. #2
    Registered Von Bongo's Avatar
    My Boats:
    1997 Cig Kevlar - powered by Boyd
    Join Date
    Dec 2001
    Iowa - Missouri

    Re: 500efi's vs 502/500Hp

    They are both 502's

    So your question is what's the difference between the 500HP and the 500 EFI.

    The only issue I know of on the 500HP is change the valve springs at 200 hours

    Thought of another one , if the 500HP has the gil exhaust and the risers are low you have some risk of reversion.

    Oh one other thing, I believe that the 500HP was blueprinted and balanced, the 500 EFI isn't.
    Last edited by Von Bongo; 06-24-2005 at 06:09 PM.

  3. #3
    Registered Semper Fi's Avatar
    Join Date
    Oct 2000

    Re: 500efi's vs 502/500Hp

    Basically from what I have been told is that the 500EFI motor is a better motor. I have HP500 carb motors, I like them-- EFI's would be nicer, but much more money.

  4. #4
    My Boats:
    Got nothing
    Join Date
    Sep 2004
    Channel Islands CA

    Re: 500efi's vs 502/500Hp

    i thought you were supposed to change the valve springs on the 500efi at 200 hours also?

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