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Thread: Merc 575 ???

  1. #1
    Join Date
    Mar 2002
    Mentor , Ohio

    Merc 575 ???

    Ok guys .... lets hear it ... 575's ... The good , bad , and ugly ???

  2. #2
    Registered Platinum Member THEJOKER's Avatar
    My Boats:
    Being a great husband and dad , boats , golf
    Join Date
    Nov 2000
    Lake Lanier - N. Georgia
    I loved mine and they were very dependable. The whine at WOT was also a plus. They're pretty easy to upgrade too.

  3. #3
    VIP Member VIP Member JaayTeee's Avatar
    My Boats:
    2002 baja 33 o/l 575sci's
    Join Date
    Nov 2002
    No complaints here.

    Neither use a drop of oil, and have
    330 hrs on them.

    The only bad I've heard is with the newer units
    that have the B&M blowers, the rear bearings
    in the supercharger have had a few failures.

    Love the whine too

  4. #4
    Platinum Member Platinum Member KAAMA's Avatar
    My Boats:
    A boat?....What boat??? How about a galvarnized warsh tub wit a toranady strapped own da rear!
    Join Date
    Oct 2000
    Western Michigan
    Call Ben at Precision Marine Offshore in Grand Haven, Michigan....he has worked on a boat with tripple Merc 575sci's over the past several years....and has even upgraded/modified them. (616) 889-2234
    Thank God for the U.S. Marines!
    ...I'm still a student.

  5. #5
    VIP Member VIP Member BraceYourself's Avatar
    Join Date
    Feb 2006
    Gellner took a few from 575 to 750 pretty easy. A year or so ago I made the decision between 525 and 575. I chose 525 because:

    1.) Unless you're going to make them 750's, the 3-4 mph difference between the two engines was not enough (on real hot days I've heard they run pretty much the same speed)

    2.) didn't want to hunt for 91 octane (525 runs on 87)

    3.) 525 is still being made, 575's are being phased out for the 600 and 700 package

    4.) I'd rather have efi n.a. up to the 700 mark, then go blown beyond that, less maintence in my opinion

    5.) More market on re-sale of 525 (again just my opinion)
    Last edited by BraceYourself; 02-06-2008 at 01:21 PM.

  6. #6
    Join Date
    Mar 2002
    Mentor , Ohio
    Thanks guys !

    I have been told alotta guys a running 89 octane with no issues .... Any of you guys have experience there ???

  7. #7
    Platinum Member Platinum Member Here's Johnny's Avatar
    My Boats:
    Sonic 358 Diablo
    Join Date
    Sep 2002
    Manhasset, NY
    Love Mine so a search on here (OSO) and you will find plenty of info on them.......

  8. #8
    Platinum Member Platinum Member wrinkleface's Avatar
    My Boats:
    NT 477!! Ilmors Baby!!!
    Join Date
    Jan 2003
    Had a pair in a 382 Formula, & w/ about 20 easy new hours the st. blower grenaded & took out the hole engine. Then all new long block and blower(NEW ENGINE) even though Merc would not call it that! same engine had other issues, don't remember exactly in 2nd summer. Fixed, then summer of my 3rd season w/ the boat & about 100 or so hours if I remember right, both right & left engines, the bearings in the pully's at the front of blowers went bad! End of that boat!!! Not real technical so hope my story makes a little sense. Very Very bad experience w/ these engines! & I am not hard on my stuff!!!!!!!!!!!!!

  9. #9
    Platinum Member Platinum Member Tom A.'s Avatar
    My Boats:
    Necessary Evil .............Donzi 38 ZrComp.............
    Join Date
    Nov 2002
    New Jersey
    Short time with mine so far but love them. Mine were freshened and bumped to 625 by Innovation before I got the boat. They start and idle extremely well for blower motors. The throttle response and blower whine are awesome and they are surprisingly fuel efficient. I ran the Sarasota Poker Run (80-90mph), burned 110 gallons and covered more than 110 miles. The boat tops out at 103ish.
    No Beak, No Bustle, No Bull. Donzi 38 ZRC

  10. #10
    Registered Von Bongo's Avatar
    My Boats:
    1997 Cig Kevlar - powered by Boyd
    Join Date
    Dec 2001
    Iowa - Missouri
    Quote Originally Posted by BraceYourself View Post

    2.) didn't want to hunt for 92 octane (525 runs on 87)

    stated was 92 when they first came out and was revised by merc to 91 later.

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