JS300 Problems in Sweden - Page 2
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  1. #11
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    Re: JS300 Problems in Sweden

    Quote Originally Posted by Bionic racing View Post
    Black / white wire will be stopper relay , activated by stop switch , those 300s , like a 750 , have to crank @ a specific speed for magneto to work and spark , get an oe Mitsuba starter , for correct cranking rpms , not a jimmy rigged chinky chank replacement , it will have to be a known good oe used starter to work correctly

    You were right, took the starter from the new ski i bought and it fired right up ��

    Hope i have time to test it in the water later this week, how hot does the exhaust run? My fueltank is resting against it (guess westcoast oversize tank for a js440 isent made for a 300?)
    Last edited by huricane4; 06-08-2021 at 08:05 AM.

  2. #12
    PWCToday Regular
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    Re: JS300 Problems in Sweden

    I ride a 300 as well. Had it for 5 years now and had nothing but fun times. It's the slowest thing on the water but as people blast past me I don't feel embarrassed by it.

  3. #13
    PWCToday.com Is My Home Away From Home Bionic racing's Avatar
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    Re: JS300 Problems in Sweden

    Your welcome

  4. #14
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    Re: JS300 Problems in Sweden

    Test drove it yesterday and everything worked perfectly and it ran cold and nice,
    it was my first time on a Jetski and i think it was really easy to get up on it and also driving it hard on knees but i really cant steer it standing up yet... feels like it dosent want to lean over and then all in the sudden it is on the side... need more practice.

    If anyone from Europe have a Complete Kerker or Mariner System i am interested.
    Also started to look for a 550, 650 or 750 engine for my other hull so if someone have that.


    Will my stock Js300 get better acceleration and or top speed with a Stainless 16pitch impeller? (my spare part jetski have one of those in perfect condition)
    It say "1610 and JS KG on it)
    Last edited by huricane4; 06-11-2021 at 02:07 AM.

  5. #15
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    Re: JS300 Problems in Sweden

    Here is a video from the first session (my friend is Riding)


    https://youtube.com/shorts/2wLejKa_HIg?feature=share

  6. #16
    PWCToday.com Is My Home Away From Home Bionic racing's Avatar
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    Re: JS300 Problems in Sweden

    Away ya go , a natural

  7. #17
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    Re: JS300 Problems in Sweden


  8. #18

    JS300 Problems in Sweden

    Looks like a runner. I found a skat 440 14 pitch impeller for my daughters js300. Out pulls my buddy’s 440 with a AM head, westcoast pipe and pjs water box. (Not with me on it though! I’m 220lbs)!
    Any stainless impeller will work better then the stock 300 impeller (unless its really tall). When i changed hers I couldn’t believe how thick and clunky it was! Almost like Kawasaki took a brick and chiseled a impeller out of it! Got it hanging on the wall in the shop and marvel how primitive it is!

    Maybe that impeller is a 10/16. Solas site has no info on it


    Sent from my iPad using Tapatalk
    Last edited by 550headache; 06-13-2021 at 08:32 AM.
    1995 FX-1: Pro-Tec chamber~Skat swirl~Pro-Tec plate~Blowsion Destroyers

    1990 Square Nose: Blue ported Jetmaniac 718~#ZERO lightened/drilled flywheel~ADA girdled/32cc~701 B pipe/flow control~Hooker 9-15~AAA pole~Pro-Tec rideplate~Tom21 Tubbies and nose piece

    2014 Super jet waiting on a B pipe and Hooker....

  9. #19
    PWCToday.com Is My Home Away From Home Bionic racing's Avatar
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    Re: JS300 Problems in Sweden

    Real early solas 16

  10. #20
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    Re: JS300 Problems in Sweden

    Quote Originally Posted by Bionic racing View Post
    Real early solas 16
    Thanks��

    Will it be to steep for a stock Js300?
    Guess i have to try if i can get the aluminium off
    Last edited by huricane4; 06-13-2021 at 12:21 PM.

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