Fuel Primer? Fuel Shutoff Valve? - Snowmobile World : Your #1 Snowmobile Forum

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post #1 of 15 (permalink) Old 11-03-2005, 05:15 PM Thread Starter
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I've read a few posts where people sing praises about having a fuel primer. I assume that they cost only a few bucks and are easy to install. Is it worth it for me to get one?

Also, what about fuel shut off valves? Is there really that big of a problem that fuel runs backwards? What kind of problems does that cause?
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post #2 of 15 (permalink) Old 11-03-2005, 07:30 PM
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Fuel Primers seem to be a love it or hate it item. I had one in my 96 Grand Touring and loved it, definitely less cranking if you knew how to use it right but over-use would flood the engine. If your choke system is working well don't think I'd bother.
As for a fuel shut off valve I'd be surprised if your sled doesn't already have one?

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post #3 of 15 (permalink) Old 11-03-2005, 08:13 PM
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Shut-off for shure..... especially if you are on a trailer, working on it with back or front in the air, ect.

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post #4 of 15 (permalink) Old 11-03-2005, 10:21 PM Thread Starter
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So are there conditions where extra priming is necessary...such as when it's a deep freeze?


For the fuel shutoff, are you saying that you should flip the shutoff valve every time you trailer the sled?


Thanks guys. I'm still learning about my sled.
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post #5 of 15 (permalink) Old 11-04-2005, 11:01 AM
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Primers are great. I always turn my fuel off when trailering. If only I could remember to turn it back on when I get to my destination. So excited to get riding, I'm always pulling and pulling trying to start it and then remember to flip the lever.

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post #6 of 15 (permalink) Old 11-04-2005, 05:31 PM
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If you trailer without shutting the gas off, and your needles and seats in the carb are marginal or failing, you can fill the crankcase with raw fuel. When you try to start the engine, the fuel ends up in the top of the cylinder and you will have a hydrolock and wonder why it won't turn over. Then you pull the plugs to see what's going on, give the rope a yank, and fuel spouts out the spark plug holes all over the place. Great. This is what you need. Fuel, oxygen, and an ignition source. I was lucky, (no fire) but I also learn from my experiences; I ALWAYS have shut the gas off when I trailer.

I had never had a problem before that; just takes one time. And when I took the carbs apart to check the needles and seats to the float, they appeared fine.

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post #7 of 15 (permalink) Old 11-06-2005, 02:59 PM
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Most sleds now do not come with a shut-off. The only thing that is troublesome with this, is that if you pull your fuel lines off your carbs, you need to plug the lines with something.

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post #8 of 15 (permalink) Old 11-06-2005, 08:06 PM Thread Starter
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The only thing that looks like a shut-off valve/switch appears to be connected to the coolant hose. Where should I look for this valve/switch?
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post #9 of 15 (permalink) Old 11-06-2005, 08:34 PM
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Quote:
For the fuel shutoff, are you saying that you should flip the shutoff valve every time you trailer the sled?[/b]
For trailering if you have it always use it. My Formula does not have it and it is a bit tricky starting after trailering.

As for the primer, once you learn your sled you will love it. I have never had a choke on a sled but have on other things and I think the primer is a lot easier. JMO
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post #10 of 15 (permalink) Old 11-07-2005, 11:02 PM
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Hmmmmm, 97 XC600, it should have a shut off valve. Look for a small metal block, about 3/4 inch square, with a red handled lever on the top. Should be mounted inline on the gas hose between the fuel tank and the fuel pump. Primer..... you going to be ready to take off both carbs, drill a hole in both of them, put in a fitting, and run fuel line to both carbs, the primer and the gas tank? Just wondering.


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