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03MtnMax700 1/2 choke runs good, turn choke off revs to 5000 then rpms drop and shuts off
- 1/2 choke on runs good, turn off choke and it revs to 5000 rpms then rpms decreseand it shuts off
started by DrewWhitcher
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October 6th 2009 at 7:27 PM
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DrewWhitcher
Starting Member
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16 Posts
Group: Members
Member Since: February 27th 2009
Location: Spokane Valley, WA, USA
Current Sled: 2003 MM 700 141"
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03 Mtn Max 700 started good and ran good when started last weekend from summer, let it run for 5 mintues, then yesterday put a riser on with extended brake line and throttle cables on, started 1/2 choke ran good, then turn choke off and it revs to 5000 rpms track starts running, then rpms drop down and engine dies and shuts off. One shop said it could be the carbs or the gas is too lean. I put more of the same fresh gas in yeasterday when I started it. Could it be the extended brake line? Throttle cables are set right. Don't know what to do next? Help!
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Site Supporter
Group: Site Supporters
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October 6th 2009 at 8:20 PM
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JFonseca
Starting Member
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6 Posts
Group: Members
Member Since: September 30th 2009
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I cant see any way an extended brake line would cause that. Double check the throttle cables for adjustment
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October 6th 2009 at 8:30 PM
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DrewWhitcher
Starting Member
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16 Posts
Group: Members
Member Since: February 27th 2009
Location: Spokane Valley, WA, USA
Current Sled: 2003 MM 700 141"
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The throttle cables look great, tension is just right on them.
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October 8th 2009 at 6:09 AM
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snowdad4
New Member
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70 Posts 
Group: Members
Member Since: October 12th 2004
Location: wa, USA
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what extended throttle cables did you use? this could be part of the issue. also, check crank seals. a bad seal will cause a rev and die issue. take the belt off your sled soit doesnt run away. fire the motor and spray carb cleaner or ether at the seal on the clutch side. easiest to get to. if an increase in rpms occurs, bad seal. the mag side is a little harder to reach, you have to spray around the recoil. also, check the carb boots to airbox and intake. could have one not sealing properly or installed wrong.you would of have to removed the carbs to change the oil cable.
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October 8th 2009 at 11:00 PM
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DrewWhitcher
Starting Member
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16 Posts
Group: Members
Member Since: February 27th 2009
Location: Spokane Valley, WA, USA
Current Sled: 2003 MM 700 141"
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I used RSI from DennisKirk.com. I sprayed the carb cleaner down around both outer seals (1 & 3). Checked the boots too. I did take the carbs off again a couple days ago and check the oil cable tension (thinking that could be something) and that was good, put the carbs back on and started it and it did the same thing. I am thinking the carbs are acting up, thanks for your help SD.
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October 8th 2009 at 11:28 PM
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stormrider62033
wally
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4729 Posts 
Group: Members
Member Since: December 25th 2004
Location: Gillespie, IL, USA
Current Sled: 99xcr 800
2008-2009 Miles: 500
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do you use iso heet ,all gas tanks are subject to condesate over summer and even in the winter ,and just a little water will affect these engines very badly
mid Il alway's waiting for snow,moving north(way north)2001 thundercat 99xcr 800 97SPX ULTRA 96 zrt 600&800,92 doo plusX 92 v max 4 750
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October 9th 2009 at 6:47 AM
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snowdad4
New Member
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70 Posts
Group: Members
Member Since: October 12th 2004
Location: wa, USA
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there are specs for oil cable, throttle cable and choke cable freeplay adjustments. i would start there. once those are met, carbs would be next to look at. do you have the ability to take them apart and clean? if you need the specs, let me know.
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