I have a 1989 Johnson 150 (J150stlcem) Due to problems created by ethanol Ive had to do work on my carbs and now will be replacing the Vro2 fuel pump. I have located a replacement on ishopmarine that is a decent price. My question is how will I know I am getting the newest replacement fuel pump that was made to address the changes in the ethanol and not old stock? Is there a part number that dictates the newer part. The price difference from this dealer and my local marine shop is significant.