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  1. #1

    Need rev limiter programmed for SLT700

    New to the site, but not new to Polaris skis. Have had my 1996 SLTX and SLT700 since new. Just picked up a "project" 1996 Hurricane that I am rebuilding the motor on.

    I replaced my 1996 SLT700 stator and CDI box with the upgrade kit for the Hurricane. It runs good but was not told it did not have a rev limiter like the stock unit. Everyone likes to spin this ski and hold the throttle while doing it. I am afraid someone is going to blow the motor up without the rev limiter.

    I want the rev limiter programmed back in. It has a serial port on the box. Is there software available that I can do this myself or is there someone here that can do it for me?

    jeff

    My email is jaspitzer at charter dot net


  2. #2
    Watcon's Avatar
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    Rev limiter

    If you bought the Polaris OEM update kit, there is a rev limiter... No need to change anything..

  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by vwztips View Post
    ...I replaced my 1996 SLT700 stator and CDI box with the upgrade kit for the Hurricane.

    It runs good but was not told it did not have a rev limiter like the stock unit.

    ...I am afraid someone is going to blow the motor up without the rev limiter...
    Welcome to the Hulk!

    Sounds like you have them already, but if you need a service manual, click here.

    This is the first I have heard of the Hurricane Ignition Update Kits not imposing an RPM limit.

    According to the Polaris 1992-1998 Service Manual, the original RPM limit on the 1996 engines was 6700RPM.

    In 1997 it was raised to 7200RPM for the Hurricane twin only. In 1998 the twins all went to 7200RPM, and 6800RPM for the domestic triples.

    The 2873022 Update Kit applies to the 1998/1999 twin carb engines, and the 1996/1997 Hurricane, so I would expect a 7200RPM limit in an updated engine.

    That said, we don't have many Hurricane owners around here...

    What RPM is your engine reaching?

  4. #4
    Maybe it's just my paranoia for riding this ski for 10 years now and having a 6700 Rev limit. You get used to hearing an engine running a certain way. Once it goes past that magic # I get worried. I have not let it run out that fast.

    I actually have talked to a Polaris engineer the past 2 days who said the Hurricane CDI was a race application and did not have a rev limiter. The race application was news to me.

    I am pretty sure I bought the part # you listed above and you say it has a 7200 ROM rev limiter?

    Will double check my part #.

    I just know my friends will nail the throttle after the ski breaks loose in a spin and will wind up with a piston in the rear end if there is not a rev limiter.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by vwztips View Post
    ...a Polaris engineer the past 2 days who said the Hurricane CDI was a race application and did not have a rev limiter. The race application was news to me.

    I am pretty sure I bought the part # you listed above and you say it has a 7200 RPM rev limiter?
    The Hurricane was sold as a retail model by Polaris, and even the Pro 785 has an RPM limiter. I don't see why even a 'race' CDI wouldn't have a limiter, at some RPM.

    The RPM limits I listed from the Service Manual were for the stock, original CDI, not the update kit. Even so, the 1997 and later twins had the 7200RPM limiter, so I would expect the Update Kit to have the same limit.

    The 1996 and 1997 Hurricane have the same crank shaft part number, so I suspect they are mechanically the same engine, as far as RPM stress tolerance goes.

    My guess is that Polaris was conservative with the maximum RPM in the early days, since 1996 was the first production year for the domestic engine. Over time, they found it could handle more, and boosted the stock limiter in subsequent production years.

    The Hurricane and the 1998 onwards twins may have had different cylinder porting and impellers to compliment the higher revving CDI. I haven't investigated the relevant part numbers and such, however, so I may be blowing smoke on that.

    1996 SL700 rated 80HP, 6700RPM limit (original CDI)
    1996 Hurricane rated 90HP, 6700RPM limit (original CDI)
    1997 Hurricane rated 90HP, 7200RPM limit (original CDI)
    1997 SL700 rated 82.5HP, 6700RPM limit (original CDI)
    1997 SL700 Deluxe rated 85HP, 6700RPM limit (original CDI)
    1997 SLT700 rated 85HP, 6700RPM limit (original CDI)
    1998 SLH 700 rated 95HP, 7200RPM limit (original CDI)

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by vwztips View Post
    ...I replaced my 1996 SLT700 stator and CDI box with the upgrade kit for the Hurricane...
    Why did you use the Hurricane Ignition Update Kit 2873022, rather than the 2873355 Kit that was meant for the 1996/1997 non-Hurricane twins?

  7. #7
    Quote Originally Posted by K447 View Post
    Why did you use the Hurricane Ignition Update Kit 2873022, rather than the 2873355 Kit that was meant for the 1996/1997 non-Hurricane twins?
    I "think" it was for the Hurricane. Will have to check when I get home.

    The original problem was an occasional hard start problem after it got warm. After reading up on the issue it sounded like the stator was breaking down once hot. I found post by Jay at Atlantic Powersports in NJ. Seemed very knowledgable and had the updated kit for the Hurricane and 98/99 700's (I think). Main difference he told me was the timing curve in the CDI. Said that's all he was buying to replace at that time. Plus they were cheaper. (Should have been a flag.)

    Again, I need to check the #'s

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by vwztips View Post
    ...I found post by Jay at Atlantic Powersports in NJ.

    Seemed very knowledgeable and had the updated kit for the Hurricane and 98/99 700's (I think).

    Main difference he told me was the timing curve in the CDI. Said that's all he was buying to replace at that time...
    Jay knows his Polaris stuff. If he says the Hurricane Ignition Update Kit is good in the non-Hurricane models, that probably is the case.

    Atlantic PowerSports is gone now, but Jay is still around

    I think you are in good shape overall. The 7200RPM limiter in the newer CDI is higher than what you were used to with the old CDI, but the engine should be able to handle it.

    The Hurricane timing curve should provide more mid-range pull. At WOT, let is know if the sustained WOT RPM is any higher with the Update CDI installed.

    All the 1996-1999 Hurricanes and 700's used the same 12-17 pitch 5131457 impeller, except for the 1996 SL700 and SLT700.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  9. #9
    It is the Hurricane kit ending in 22.

    Starting another thread about pistons. Please respond if you know the answer.

  10. #10
    Rode this weekend. I actually have 3 issues.

    1. I didn't try to hit the rev limiter if there is one. Too cold to spin and rinse!
    2. I did do WOT runs and the RPM would peak about 6300 then start going down on the display but the engine was still running WOT. It would keep going down as if the signal was lost. I could run all day below WOT and the display would show what the engine was doing.
    3. Kill switch will work only by holding it until the engine was dead.

    Any help would be appreciated.

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