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Idle RPM for Scarab 190

Discussion in 'Rotax Engine Topics' started by Floyd, Mar 6, 2017.

  1. Floyd

    Floyd Member

    Messages:
    47
    Ratings:
    +10 / 1
    Boat Make:
    Scarab
    Year:
    2016
    Boat Model:
    Impulse
    Boat Length:
    19
    My idle is 1700 rpm, which makes me go 9-12 mph, and docking is lurchy. What should the idle be set at? I'm still learning how to come into a dock safely. Having to push the lockout button on the throttle lever while standing is somewhat of a problem when trying to go really slow or reverse at a dock approach, but the high idle is bothering me.
     
  2. JetTech72

    JetTech72 Jet Boat Lover

    Messages:
    134
    Ratings:
    +85 / 0
    Boat Make:
    SeaDoo
    Year:
    2012
    Boat Model:
    Challenger
    Boat Length:
    23
    Your idle is correct, I think it's 1750+/-50rpm.
    The speed @ idle should be more around 6mph, and yes you will have to work the gate around dock & trailer.
    That's were the new BRP electronic shift brings low speed boat control in a whole new world, making it so easy around dock & trailer.
     
  3. Beachbummer

    Beachbummer Jet Boat Lover

    Messages:
    384
    Location:
    Houston TX
    Ratings:
    +232 / 4
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    SX
    Boat Length:
    23
    I have an older seadoo...In mine you can move the FNR lever partially forward, resulting in speed increments from 0 to 5 based on how far you open the gate. I see the new electronic gate and wondered if that's an option...

    Can you push the lever only partially forward to make your boat move at a lower speed if you desire? (Not sure if this is possible with your boat)
     
  4. Floyd

    Floyd Member

    Messages:
    47
    Ratings:
    +10 / 1
    Boat Make:
    Scarab
    Year:
    2016
    Boat Model:
    Impulse
    Boat Length:
    19
    Yes, I can push the shift lever incrementally to control the front/rear thrust ratio, but it's real touchy and requires multiple presses of the neutral lock button; both of which are somewhat tedious when there is current or wind or anything other than optimal conditions. My boat also has digital speed control modes, one of which is a "Docking Mode" which "limits engine power for increased maneuverability while docking". I haven't used that yet, but I suspect that it only locks in the idle RPM, rather than reduce it, which would prevent you from giving the boat a burst of reverse power to prevent hitting the dock. I will endeavor to use the old adage...."never approach a dock at a speed greater than one you are willing to hit it at" (or something like that). I also have to get used to the reverse thrust moving the boat opposite to the direction of every other boat I have owned.
     
  5. patrickgrizz

    patrickgrizz New Member

    Messages:
    16
    Location:
    77396
    Ratings:
    +8 / 1
    Boat Make:
    SeaDoo
    Year:
    2012
    Boat Model:
    Challenger
    Boat Length:
    18
    Docking mode just makes it so a full throw of the throttle will only bring you up to 3500rpm. You can definitely still throw it in reverse and give a "full" thrust (it's limited anyways to only like 1inch of movement on the throttle). It's nice for forward as well because you can give it some forward throttle for maneuvering etc without worrying about accidentally slipping and giving a large burst of speed.
     

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