speed freak
05-17-2007, 06:45 PM
I have a 97 2.5 mariner super magnum. The heads are stamped 18488 C4. I can go to any merc site and they will not pull up. 18488 F1, which is what I was told should be on there will pull up but not mine. Any answers? They motor runs great, not complaining, just curious. I was told by the previous owner that the heads were swapped out so he could run pump gas.