525SC Serial Numbers ???
#2
Gold Member
![](https://www.offshoreonly.com/forums/images/icons/gold_member_star.gif)
![Default](/forums/images/icons/icon1.gif)
http://mercruiserparts.stemtostern.c...nceengines.asp
PHP Code:
MODEL MAKE CID #CYLS YEAR SERIAL NUMBER
525 SC GM 454 8 1991-1992 OD456000-OF348963
525 SC (GEN V)GM 454 8 1992-1995 OD456000-OF348963
525 SC (GEN V)GM 454 8 1996 OF615814-OF745215
525 SC (GEN VI) GM 454 8 1997 OF745260-OF877734
525 SC (GEN VI) GM 454 8 1997 OK000012-OL415623
575 SCI GM 502 8 2000 OL601000-OL602090
575 SCI GM 502 8 2001 OL306696-OL307026
575 SCI GM 502 8 2001-2002 OM050000-OM053292
575 SCI GM 502 8 2002 & up OM900000 & up
Last edited by pkspx; 09-29-2007 at 09:30 AM.
#4
Gold Member
![](https://www.offshoreonly.com/forums/images/icons/gold_member_star.gif)
#6
Charter Member # 55
![](https://www.offshoreonly.com/forums/images/icons/charter_member_star.gif)
![Default](/forums/images/icons/icon1.gif)
On my '96 525SC, I couldn't find the number either until I tore it apart. There was no riveted tag, but the engine was still wire sealed on the intake and crank pulley bolts.
I finally found it when I rebuilt the top end. The serial was stamped into the block behind the fuel filter seapump bracket, just below the cylinder head, if I remember correctly. Also the stamping was only about the same size as the type you are reading now.
I finally found it when I rebuilt the top end. The serial was stamped into the block behind the fuel filter seapump bracket, just below the cylinder head, if I remember correctly. Also the stamping was only about the same size as the type you are reading now.