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  1. #1

    Catch Can - Gas?

    HI

    Got a 2020 rxt, few small mods, consider it a stage 1,running about 8300rpm

    Got a Riva catch can on since new, and noticed that if riding hard, it tends to initially get upto 1/4 of vapour in it, seems the more i ride harder the quicker it fills

    when removing it, its quite runny like water and smells strong of gas / oil mixture.

    Wondering why i would see this instead of more oil, would this still be indicative of overfilled oil?

    Photos, last one is after about 10 hrs i guess
    https://imgur.com/a/ORMjRNH

  2. #2
    4-keeps's Avatar
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    [QUOTE=buzurk;3148525]HI

    Got a 2020 rxt, few small mods, consider it a stage 1,running about 8300rpm

    Got a Riva catch can on since new, and noticed that if riding hard, it tends to initially get upto 1/4 of vapour in it, seems the more i ride harder the quicker it fills

    when removing it, its quite runny like water and smells strong of gas / oil mixture.

    Wondering why i would see this instead of more oil, would this still be indicative of overfilled oil?

    Photos, last one is after about 10 hrs i guess
    https://imgur.com/a/ORMjRNH[/


    That has to be pretty normal, I know all of the Seadoo’s I have owned modded with a Riva catch can while running extremely hard during the ride has put some fluids in the can. Most of the time it has been very runny and smells like gas.

    Billy D

  3. #3
    Team Bilford's Avatar
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    It's normal. Much of the ring blow by that creates crankcase pressure carries unburnt gas and other petroleum distillates that are lighter than oil. The only time oil will be the dominate substance will be in cases of over filling.

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  5. #4
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Team Bilford View Post
    It's normal. Much of the ring blow by that creates crankcase pressure carries unburnt gas and other petroleum distillates that are lighter than oil. The only time oil will be the dominate substance will be in cases of over filling.

    Exactly correct!

    Your catch can is doing it's job. All that mess would end up coating your intercooler if you weren't running a catch can.


  6. #5
    Team Bilford's Avatar
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    Not all of that gas winds up in the can. On oil analysis, the amount of gas in the oil can reach 3.5% in only 10-15 hrs on the 300s.
    That is why I change my oil every 25 hours. If you ever thought that your oil level was rising, now you know why. Don't fill the sump higher than mid kink on the stick or you might start getting oil in the can.

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