What's the importance of shutting off fuel?

[IDoSeaDoo]

This may be a noob question, but what's the importance to shut off your fuel? When should you do it and why? I realized that I never shut it off, because I just know I'm going to forget it some day, get on and kill my battery trying to crank the thing. Would this prevent flowback, potentially making an easier start when I go to restart it?

 

[LouDoo]

It's really not necessary, I shut mine off once a year when I winterize the ski.

Lou

 

[Spimothy Leary]

My fuel selector valve hasn't moved since I bought the ski.

 

[racerxxx]

I shut mint off when I'm done riding for the day. Force of habit. I do the same thing with my trike, my snow blower and anything else that has one.

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[Toolanddiemaker]

I also shut mine off on my boat and my ski, just a quick pull of the choke and they fire right up it only takes a second and doesn't drain the battery but I'm ocd about gas because I store everything in my garage and I'm always scared of gas draining out even though it will never happen lol!


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[Coastiejoe]

The newer skis do not even have a means to turn the fuel off. I don't think any 4-tec has a fuel shut off for example,,

 

[mikidymac]

The 4-tec's are fuel injected so no reason to be able to turn the fuel off.

On the carbed skis it is a good idea to turn it off because it keeps the pressure in the tank from pushing on the needle and seats when the tank gets hot and the gas and vapors expand. If you have a slow leak in the needle and seat it can flood the engine too.

 

[IDoSeaDoo]

Shouldn't the check valve allow the pressure to escape the tank if it reaches more than 3psi?

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[Dr Honda]

The 4-tec's are fuel injected so no reason to be able to turn the fuel off.

On the carbed skis it is a good idea to turn it off because it keeps the pressure in the tank from pushing on the needle and seats when the tank gets hot and the gas and vapors expand. If you have a slow leak in the needle and seat it can flood the engine too.

What he said.

Shouldn't the check valve allow the pressure to escape the tank if it reaches more than 3psi?

It should... but things fail.

 

[mikidymac]

I think the check is 7 psi so enough to overcome a weak or leaking needle and seat. Although I was wrong once.