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Message: <blockquote data-quote="poorthang" data-source="post: 488094" data-attributes="member: 31585">i think you got it backwards. isnt the second (bottom ) one the original? if i remember right, there is an oring that goes around a plunger on the engine side. the plunger is ran by the cam to operate the pump. that is probably where your oil leak is coming from.  what is the purpose of the extra hose nipples? the pump pictured mounted on your engine has a fuel line going into, and one going out of the pump. why does the new pump have extra nipples? wrong pump? or maybe yamaha changed the pump and it can accomodate two tanks? should you cap the unused two nipples?  considering the misinfo, the very first thing i would do id to confirm that you bought the correct pump.</blockquote>