OMC 986991 0986991 986516 3.0L Exhaust Manifold 1990 GM 3.0L Non-HO PWS Models Exhaust Tubes Found on Johnson / Evinrude

Found on Johnson / Evinrude 2cyl Outboards  10hp (1951-1957)

Manufacturer Part Number: 48-42740A10

Part number on gas fuel tank support bracket is 203196 which is the same as 203624 & 205069

but maybe not

Volvo Penta / OMC Joint Venture 3868077 / 3850966 / 3856181 / 3857007 Cobra SX Sterndrive Upper Gearcase Unit

OMC 986991 0986991 986516 3.0L Exhaust Manifold 1990 GM 3.0L Non-HO PWS Models Exhaust Tubes Found on Johnson / EvinrudePart Number(s) Included OMC 986991 0986991 986516 (Stamped) Exhaust manifold HOLLEY CARBURETOR MOUNTING General Application Compatibility Seemingly just found on 1990 3. 0L 302BMRPWS & 302BPRPWS Models (Ideally you want to be matching the stamped number on your existing manifold These were the Non H. O. Models with a cylinder head that has the ports that WERE NOT all the little squares in a straight line. This could likely replace the 986984 (stamped)