Results 1 to 9 of 9
  1. #1

    Join Date
    Oct 2009
    Location
    Pouce Coupe BC
    Posts
    111

    ok Polaris pros I need some help with my 1993 sl750

    I go to the lake and it starts and I am trying to tune the carbs in. After I warm it up, the machine has no spark on any plugs. This has happened three times (three different days). My cdi, I believe is off a 780. The numbers are 17120401, F8T33074 and 78W978. Is that an ok cdi for my 93 SL750? I noticed a gray wire hidding under the cdi that is not attached to anything, I believe it is for high temp????

    My Magneto stator coil readings, with a not so great ohm meter;

    Red/Purple to Yellow is .2 ohms Book says .6 ohms
    Red/Purple or Yellow to black is open Book says open
    White/Yellow to Black is 215 ohms. Book says 220 ohms.
    Blue/Red to Red/White is 88 ohms. Book says 90 ohms
    Red/White to Black is open. Book says open

    Ignition coils

    with all three connected in series but not connected to cdi is 1.3 ohms. Book says 1.6ohms.

    The lanyard is working correctly so it is not the problem.
    I noticed the yellow wire had a rubber piece on it that was loose and the bare wire could have contacted the case for the CDI, its fixed now.
    Any help before I head off to the lake again? It has a nice blue spark right now sitting on the trailer.
    Last edited by Frozen; 07-31-2010 at 12:23 AM. Reason: info


  2. #2

    Join Date
    Oct 2009
    Location
    Pouce Coupe BC
    Posts
    111
    PS I have never had this machine really running, it is new to me, sort of. I rebuilt the impeller and cleaned the carbs. As for the history of it I have no idea.

  3. #3

    Join Date
    Oct 2009
    Location
    Pouce Coupe BC
    Posts
    111
    I just read that the yellow wire is for the alternator. The bad reading on it indicates that my battery is not being charged? But I put my 1994 650 battery in it and it still would not start and the 650 started with the 750 battery without any charging. I also had a battery booster on the 750 and it had a very yellow spark.

  4. #4
    Clayton G's Avatar
    Join Date
    Apr 2009
    Location
    Upper Peninsula of Michigan
    Posts
    143
    The CDI you are using is from a 780, F8T33074, and is incompatible with your 93 flywheel. The 780 CDI is digital, the 93 is analog. You need a CDI from a 93 650 or 750, F8T16273. They are the same. The 780 CDI would work if you had the 780 flywheel. Timing would also be increased by 6 degrees.

  5. #5
    Superd2K's Avatar
    Join Date
    Jun 2009
    Location
    Boise, ID
    Posts
    133
    +1
    3
    Would an F8T32071 work? It's out of a 95 750. I know it was compatible with my 94 750.

  6. #6
    Clayton G's Avatar
    Join Date
    Apr 2009
    Location
    Upper Peninsula of Michigan
    Posts
    143
    The 94-95 750's were digital also.

  7. #7

    Join Date
    Oct 2009
    Location
    Pouce Coupe BC
    Posts
    111
    ok thanks. So does anyone have a cdi for a 1993 sl750 for sale, or a flywheel for the 780?

  8. #8

    Join Date
    Oct 2009
    Location
    Pouce Coupe BC
    Posts
    111
    Hey Clayton G, I take it you modified a 1993/94 sl 750? It looks like the cdi is twice as much as the flywheel. Should I look for the flywheel instead? How about the stator, is it the same in both models?

  9. #9
    Clayton G's Avatar
    Join Date
    Apr 2009
    Location
    Upper Peninsula of Michigan
    Posts
    143
    Quote Originally Posted by Frozen View Post
    Hey Clayton G, I take it you modified a 1993/94 sl 750? It looks like the cdi is twice as much as the flywheel. Should I look for the flywheel instead? How about the stator, is it the same in both models?
    Hello Frozen, I'm in the process of working on a 93 750 race engine. It came with a total loss ignition and I want to put a charging ignition system on it. I have an extra 95 stator and flywheel, but didn't know why the difference in the flywheel as aposed to the 93. I asked here on GH and was told about the digital and analog CDI's and flywheels. I was also told that some believe that using a analog stator might burn out with a digital CDI. Some think it wont matter. I'm still in the process of chasing down parts. So to answer your question, it's up to you. Myself, I would look for the flywheel since it is cheaper. You already have the CDI. Get it running and then keep an eye out for the 780 stator. You might be able to find one reasonably priced if you're not in a hurry for one.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. need some help with my rxt
    By johnrxp in forum 4-Tec Performance
    Replies: 11
    Last Post: 05-29-2011, 08:52 AM
  2. need some help with my 06 rxt
    By shortii_trk in forum 4-Tec Performance
    Replies: 11
    Last Post: 05-05-2011, 11:35 AM
  3. need some help with my mods
    By homebrew in forum 4-Tec Performance
    Replies: 14
    Last Post: 10-15-2009, 10:49 AM
  4. Need some help with my 97 XP
    By midnight08 in forum 2-Stroke Performance
    Replies: 7
    Last Post: 05-27-2009, 07:51 PM
  5. I Need Some Help With My Shark !!!!!!
    By sleblanc in forum Polaris Open Discussion
    Replies: 9
    Last Post: 12-20-2006, 03:17 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •