Excessive pressure in fuel tank - HCS Snowmobile Forums

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Old 03-14-2019, 11:07 PM   #1 (permalink)
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Default Excessive pressure in fuel tank

Does anybody know the official skidoo reasoning behind the g4 platform fuel tank venting.

Seems like it is way to much pressure when removing cap.
My 19 600r, my buddies 19 850 is the same. Is this a potential issue or is it is what it is.
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Old 03-14-2019, 11:20 PM   #2 (permalink)
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Originally Posted by rmk4 View Post
Does anybody know the official skidoo reasoning behind the g4 platform fuel tank venting.

Seems like it is way to much pressure when removing cap.
My 19 600r, my buddies 19 850 is the same. Is this a potential issue or is it is what it is.
Pretty much normal for all sleds now. EPA mandates that they have check valves in the vent lines to prevent excess hydrocarbons from escaping and offending snowflakes.

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Old 03-15-2019, 10:40 AM   #3 (permalink)
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Fuel expanding as it gets warm. No biggie. Helps out the fuel pump.
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Old 03-15-2019, 10:53 PM   #4 (permalink)
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Fuel expanding as it gets warm. No biggie. Helps out the fuel pump.
Exactly my thinking. I mean, fill your tank and sit on the seat before you close the gas cap and you'll find out where that pressure comes from real quick. Plus it's better to push some extra fuel through the system than have negative pressure lean you out.
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