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2004 500 HO Fuel pump problem

14K views 9 replies 3 participants last post by  polman500  
#1 ·
Got a new carb and now I am not getting fuel out of the new fuel pump. Not 100% sure I have the vacuum line on correct but I am getting great fuel flow to the pump. I was getting flow to the old carb. Any ideas or if diagram I am out to check all the lines are on snug
 
#3 ·
Thank you for the diagram, I was just looking I have one one line coming from the bottom of the block it has what looks like a fuel filter and it pulses as it cranks but the diagrams say it isn't the pulse line plus it is a bigger diameter than all the other lines. Maybe I am reading them wrong but i hooked it up to the pulse line and nothing. I marked the old carb where everything went then left it at home.
 
#4 ·
The crankcase has a vent line with a filter that goes to the air box - it is a relatively large hose - the fuel pump has 3 lines all about the same size - the vacuum line comes from the RH side of the carb close to the carb holder - the fuel line from the fuel pump goes to a nipple on the LH side of the carb close to the air inlet
 
#9 ·
I have checked and double checked it is hooked correctly, it will start and run with B-12 sprayed in I just cant get good flow of gas. It just dribbles at the carb or out at the pump. Good flow going in the pump. It is a new pump and I may have to try a new pump. I wouldn't think they change but mine is a late 2004 model. The pump I bought end at the 2004 model year so I was thinking maybe just maybe it doesn't work for late 2004. Plus the pump sat open for about a year before I tried to fire it up