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  Posts: 7
 
 
  | I believe I have a fuel pump going bad on my 50 hp Evinrude outboard.  It's a 2 stroke, either 96 or 97. I'm trying to order the part online but can't quite find the exact part number.  I'm finding lots of 438556, but mine is 438557. Think I could use the 438556? I wondered if it was just a newer version possibly, as it looks very much the same.  Any info greatly appreciated.  Thanks!  
  
Neil | 
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  Posts: 1096
 
  Location: Hayward, WI | It looks like one gets the pulse via hose and the other gets pulse through hole in the back?  Does your fuel pump have 2 or 3 hoses attached? | 
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  Posts: 218
 
 
  | You may want to check the fuel check valve just above the tank. In 96 I spent $300 plus on a fuel pump just to discover it was a fail backflow valve in the fuel system. Engine would run when you pumped the bulb then quit when fuel pressure was lost. | 
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  Posts: 7
 
 
  | Ok thanks, I will look into that in the morning. That's exactly what it's doing.  Hopefully that's it. I did finally find the correct part as well.  Thanks for the info. | 
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