Just bought new skiff, maiden voyage runs great. Just need more speed SCOTTY . I was reading owners manuel for 2002 mecury 20/25hp everything is identical bore, stroke, displacement, plugs, gear ratio, only difference noted was 20hp 4500-5500wot and 25hp 5000-6000wot. Can I find the other 5 ponies and how? carbs, jetting? thnx for help guys.