I'm having some trouble finding an alternator for my engine, because I can't find my serial number; and i'm not sure the Alternator on the engine is the appropriate one. Here is what I know about the engine. <br />1987 Mercruiser 260<br />350ci.<br />staggerd bolt pattern for the starter.<br />The only number I could find above my starter was,<br />10243888D I couldn't match this up with a serial number so I'm not sure what it is, but it's on the block itself above the starter.<br /><br />Someone told me there are 4 different Alternators for this year. I can't understand what the big difference would be. Can someone help me with what my options are at this point?