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Fuel line goes to where?

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Luke42_02

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When I bought my 1998 seadoo speedster, I was delighted to find that the old grey fuel lines had been replaced. Recently its been having trouble with the engines dying at idle and the left engine won't get to full RPMs unless it has been warmed up for 15-20 minutes.

Anyway, I was checking everything over and I spotted some of that nasty grey tubing coming out of the fuel pump. The line into the fuel pump is good and the line from the fuel pump to the carb are both good, but there is a third line that heads down from the fuel pump toward the engine. This is the original nasty grey fuel line. It is #34 in this diagram: http://partsfinder.onlinemicrofiche.com/seadooforums/showmodel.asp?Type=13&make=seadoojb&a=171&b=14&c=0&d=-FUEL-SYSTEM

The diagram only says it goes to the "Engine". Anyone know what this line does? Do I need to replace the line? Can it wait until the season is over?

On a side note, I'm planning on replacing the fuel filters and spark plugs to see if that helps it run smoother. All advice is appreciated.
 
That's your crankcase impulse line for the fuel pump, it does not flow gasoline in that particular line but I'd still change it at some point if you're in the carbs for anything.
 
Gray lines bad...Take off the pulse line and take a look I bet you will see some green goo. The issue with not replacing the gray pulse line is you can suck the goo in the fuel pumps than. The line replacement only take like 10 mins super easy might have to remove the flame arrestor to get better access to the clips to remove. FYI most boats didn't come with the gray tempo lines since they are not coast guard approved. Jet skis are exempt from certain things the boats are not that is why all the skis had those gray lines...
 
I actually can't see where the line goes to. If it was easy to get to I'd just replace it. I'll take off the flame arrestor and see if that helps.
 
You will see it right in front of the carbs on the lower 1/2 of the engine case. On the side of the rotary valve case towards the MAG end or front of the motor.
 
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