Fuel vapor issue

[Alexander Caro]

I am restoring a 2001 superjet and I’ve pretty much rebuilt and completed everything. But every time the machine sits for a bit with its hood on There a strong fuel smell when the hood is taken off. I’ve checked extensively for leaks and there is none, and the tank holds pressure. My best guess is that the vapor is coming out of the carbs and if it is, is that normal?

 

[hornedogg79]

Check for leaky needle/seat. When not in use turn the fuel selector to off and loosen the filler cap. This is especially important if the ski is left outside in a warm climate. The fuel tank can warm up, pressurize, and push the fuel to your carbs. If it makes it past the needle or seat it can fill your cases full. Fuel vapor inside a jetski hull is never good. There are some pretty entertaining videos to illustrate this fact.

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[Alexander Caro]

Thanks for the reply, I bought brand new needles/seats but I guess the pressure still pushes past the valve. I’ll just need to remember to keep the valve shut, I don’t want to end up in a video haha.

 

[john zigler]

What did you use for fuel line, and clamps? I ask as we see issues with cheap colored line, and standard square head zip ties. Many times it leaks bad enough though that you see it being wet, or even fuel in your hull but I have had them "weep" jsut a little, and would be enough for vapors and smell.

Make sure to use quality line, and if you are using zip ties, make sure to get specific ones with a curved head specific for fuel line.

 

[Alexander Caro]

What did you use for fuel line, and clamps? I ask as we see issues with cheap colored line, and standard square head zip ties. Many times it leaks bad enough though that you see it being wet, or even fuel in your hull but I have had them "weep" jsut a little, and would be enough for vapors and smell.

Make sure to use quality line, and if you are using zip ties, make sure to get specific ones with a curved head specific for fuel line.

Thanks for the reply, I used all oem lines but I did not know the zip ties needed to be specific, I’ll change all of them and see if the smell goes away.

 

[john zigler]

Thanks for the reply, I used all oem lines but I did not know the zip ties needed to be specific, I’ll change all of them and see if the smell goes away.

Standard zip ties are better on OEM lines. It is the cheap transparent line where we have seen problems. I still strongly recommend the curved head zip ties for fuel lines regardless.

 

[kevbo]

There may not be that much actual fuel vapor under the hood., its difficult to tell. Enough fuel will slowly run out of the pilot ports to make it stink. All my skis smell of gas for weeks if I leave the hood locked down.