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Arctic Cat: Powder Special and older 2000 and older, all models in the Powder Special chassis and older chassis models
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Old 01-29-2016, 06:57 AM
tatlock tatlock is offline
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Default 700 powder special Severe Flooding

hell ladies n gentelmen Mark here Got a Question for any or all who may be able to help . ok here goes bought this old sled drained all the old fuel outta it put in new high test she fired up ran not to bad . Did pop n backfire a few times but when driving it hard had no problems. But heres the kicker after sitting a few days the cylinders filled with fuel . so pulled the carbs off (flat sided ones ) tore them apart one float the screws were loose so checked the needle and seats they both work good open and closed .So is it possible that the fuel pump is sucking gas into the crankcase this is the one thing that i have not checked yet . Any or all advice will be greatly appreciated Thanks A Whole Bunch Mark AKA Tatlock
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Old 01-29-2016, 07:51 AM
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olymon olymon is offline
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Bad fuel pump would only let fuel into the side of the crank case that has the impulse line in it. Plugged vent line in a warm garage may make enough pressure to flow past the needle and seat. Sure sounds like the needle and seats though even though you say you checked them.

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Old 01-29-2016, 02:47 PM
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The fuel pump would be my best guess too, but even though the floats are moving freely and the needles appear to be closing there may still be a bit of something preventing one or both from sealing completely. Also the center seal in the crankcase is not a complete seal like the outside crank seals. It is more like piston rings with a little end gap. It will allow gas to leak from one side to the other over time.
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Old 02-15-2016, 11:25 PM
phess2 phess2 is offline
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Well if it is not an Efi, I have a spare fuel pump from a 2000 700 powder special for sale.
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