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Low rpms at full throttle

Discussion in 'Yamaha AR240, SX240, 242 Limited / S / X/ E-Series' started by chadweiser, Jul 7, 2018.

  1. chadweiser

    chadweiser Jet Boat Lover

    Messages:
    39
    Location:
    west mansfield, ohio
    Ratings:
    +25 / 0
    Boat Make:
    Yamaha
    Year:
    2017
    Boat Model:
    AR
    Boat Length:
    24
    max rpms are only around 7000 with two people. Max speed is 47mph.
     
  2. swatski

    swatski Jetboaters Admiral

    Messages:
    6,815
    Location:
    Saint Louis, MO
    Ratings:
    +7,166 / 107
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    AR
    Boat Length:
    24
    That's very unusual in that 47mph would typically require spinning the impellers at about 7,500+ RPM or so, definitely more than 7,000... Are your impellers original/OEM or have been replaced? It would seem you may be "overpitched" but that is very unusual, I would think.

    --
     
  3. chadweiser

    chadweiser Jet Boat Lover

    Messages:
    39
    Location:
    west mansfield, ohio
    Ratings:
    +25 / 0
    Boat Make:
    Yamaha
    Year:
    2017
    Boat Model:
    AR
    Boat Length:
    24
    This is a stock boat with 65 hours.
     
  4. chadweiser

    chadweiser Jet Boat Lover

    Messages:
    39
    Location:
    west mansfield, ohio
    Ratings:
    +25 / 0
    Boat Make:
    Yamaha
    Year:
    2017
    Boat Model:
    AR
    Boat Length:
    24
    2017 ar240
     
  5. Weeb

    Weeb Active Member

    Messages:
    181
    Location:
    Denver NC 28037
    Ratings:
    +98 / 0
    Boat Make:
    Yamaha
    Year:
    2017
    Boat Model:
    AR
    Boat Length:
    24
    My California 17 ar240 maxes out at about 7300 rpms.
     
  6. Stevenpigsooie

    Stevenpigsooie Active Member

    Messages:
    73
    Location:
    Beaver Lake, Arkansas
    Ratings:
    +71 / 0
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    AR
    Boat Length:
    24
    My 2016 ar240 maxes out around 7300 rpm and will get to 47 mph with full tank and 2 adults. I’d like to get out there by myself and 1/4 tank of gas and see if I can get to 50.
     
  7. fireflymedic

    fireflymedic Jet Boat Lover

    Messages:
    253
    Location:
    Bonifay, Florida
    Ratings:
    +183 / 0
    Boat Make:
    Yamaha
    Year:
    2015
    Boat Model:
    AR
    Boat Length:
    24
    7200 or 7300 rpm's is max on my 2015 ar240
     
  8. Hilario Perez

    Hilario Perez Active Member

    Messages:
    159
    Location:
    Kissimmee FL.
    Ratings:
    +59 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    SX
    Boat Length:
    24
    I'm having that same problem also my starboard motor comes out at 7000 RPMs and little by little goes to 6800 RPMs my port side motor runs at 7300 RPMs when no problem it just started doing that recently anybody got any ideas for what I need to look at.
     
  9. swatski

    swatski Jetboaters Admiral

    Messages:
    6,815
    Location:
    Saint Louis, MO
    Ratings:
    +7,166 / 107
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    AR
    Boat Length:
    24
    Same here, on a hot day. I think, just about.

    --
     

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