Polaris Discussions about Polaris ATVs.
Sponsored by:
Sponsored by:

97 scrambler 500

  #1  
Old 04-28-2019, 01:58 AM
Weekend Warrior
Thread Starter
Join Date: Apr 2019
Posts: 3
Default 97 scrambler 500

So i bought a 97 scrambler 500 not running right and cant get it running right. When i first got the quad it acted like it was hitting a rev limiter. Around quarter throttle is will act like its at top speed and start to pop and back fire. I cleaned the carb, as of today i replaced the cam and rocker arms, fuel pump, and lines. Valves were way out of spec from the previous owner and he got it just like i did and couldnt figure out what was wrong. any suggestions would be great. i have ran a volt meter on a few things and they checked out.
 
  #2  
Old 04-28-2019, 08:16 AM
stendori's Avatar
Super Quad Patrol
I'm watching you!
Join Date: Jul 2003
Location: central maine
Posts: 14,155
Default

do a check on the etc to make sure it is not activating the override. should be an 1/8" gap on the throttle cable. at least that would rule it out for the limiter coming on
 
  #3  
Old 04-28-2019, 10:07 AM
Weekend Warrior
Thread Starter
Join Date: Apr 2019
Posts: 3
Default

i did start to check that out, so is there a way to test the module to make sure the board in there and the switch isnt bad? and let me ask another question about the play in the throttle cable. if im pushing in on the throttle cable to give it gas then the slack would disappear so how would the slack in the cable work with the override? i know as of last night there was no slack in the cable but it looks like the switch is working per say that the cable does get stuck to override the throttle.
 
  #4  
Old 04-28-2019, 12:33 PM
stendori's Avatar
Super Quad Patrol
I'm watching you!
Join Date: Jul 2003
Location: central maine
Posts: 14,155
Default

there should be 1/8" slack with no pressure on the throttle so you be able to move the cable in the housing showing its not too tight. not sure on how to set the board.
 
  #5  
Old 04-28-2019, 02:42 PM
Big Frank's Avatar
THE BERMINATOR
Join Date: Sep 2018
Location: Michigan
Posts: 1,170
Default

I'm just guessing here but if your throttle cable is adjusted to no more than 1/8" of slack and no less than 1/16" this might work. You could try taking the top off the ETC and revving the engine then touch the contacts together and see if stays revved up, drops down to an idle, or dies. AFAIK it should work.
 
  #6  
Old 04-29-2019, 04:06 AM
Weekend Warrior
Thread Starter
Join Date: Apr 2019
Posts: 3
Default

It doesnt matter if its touching or not, again i bought the quad this way. Changed the cam and rockers. Cleaned the carb. Replaced vacuum lines and fuel lines. Fresh fuel. And no change at all. Bad cdi? Bad coil?? Maybe the other two flat black boxes by the fuse box/main wire panel?
 
  #7  
Old 05-09-2019, 09:34 AM
Trailblazer
Join Date: Nov 2015
Location: Orlando, FL
Posts: 55
Default

Not sure if you got this fixed but I had a similar problem with a Yamaha Big Bear that I picked up after it had been swamped. I basically replaced numerous parts trying to fix it almost identical to the parts you changed and eventually took it to a professional mechanic to fix it. Unfortunately they didn't fix it and couldn't figure it out. That's after me paying them $400 to rebuild an already clean carb and put in a new Stator. I eventually purchased a new CDI after I had literally tried everything else and when I plugged the new CDI the ATV finally performed to perfection. Based on my experience hitting a number of forums for help most peoples experience is the CDI is either bad (no spark) or good. Not in between like this where you get some spark but it breaks up at high idle. I would say that it is worth a try if you haven already fixed it or tried a new CDI. I actually purchased a Chinese aftermarket one on Ebay for $70 because the only other option was a new OEM one.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MuDsLiCa
Polaris
14
06-25-2003 08:04 PM
slickrock
Polaris
5
12-15-2000 01:17 PM
toysoldier76
Polaris
2
03-22-2000 11:27 AM
Jaster350
Polaris
6
08-14-1999 02:44 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 97 scrambler 500


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: