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Old 11-24-2012, 11:50 AM   #1 (permalink)
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EXT 580 bogs

Hi guys, my EXT Boggs out off idle. I have tried everything:
Carbs cleaned
Primary clutch cleaned and rollers replaced
Diddled with the secondary spring settings
Stator changed out
New bearings in driveline
One thing I have not done is replace the home made can on this thing. It is just a piece of pipe where the box should be. Do you think this could be my issue?
I am waiting for snow to try it with the new bearings. The PTO side bearing was kinda trashy, hopefully that will make a difference too.

Thanks,
Brad
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Old 11-24-2012, 01:51 PM   #2 (permalink)
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the can just silences the flow. it sounds like its running too rich. adjust the airflow. im not sure what kind of carbs your sled has, but tooo much gas will make it bog. you could google how to do it, or if you know which screw it is, fiddle with it. if u have dual/tri. carbs turn each screw out the same.
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Old 11-24-2012, 01:59 PM   #3 (permalink)
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Change the can as well. Most do not think it effect anything but there is a certain amount of back pressure needed. I would also check your boots see if there any cracks in them!
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Old 11-24-2012, 02:32 PM   #4 (permalink)
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true grudman, but thats not causing it to bog. but yes replace the can! adjust airflow! make sure pilot jet is clean! go sledding when your done! haha if there is snow
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Old 11-24-2012, 03:51 PM   #5 (permalink)
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There be plenty of snow this season it coming. What usually causes a bog is air to full ratio when throttle bodies open either allowing to much air and not enough initial fuel. How doe sit run once you open it up?
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Old 11-24-2012, 04:35 PM   #6 (permalink)
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Yes the can could affect off idle? Also and most likely, the center to center on the clutches! It needs to be 12.2 (12 1/4" works!) This and a new belt will give you the best ratio for take off as well as top end! You also want the belt as tight as possible! There are 3 flat washers in between the clutch sheves, thick and thin! Take one 1 at a time till it squeels with a new belt, then put a thin back in!
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Old 11-24-2012, 09:23 PM   #7 (permalink)
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Thanks Dan. I'll check the clutch distance. It is bored over stock jets are 310's I have 290's. The plugs still blacken up. I can get a stock can off of eBay.
Hopefully, the bearings and Hifax will help as well.
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