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Please help starboard engine not reving up

Discussion in 'Yamaha AR240, SX240, 242 Limited / S / X/ E-Series' started by Brad Dunn, Jul 15, 2018.

  1. Brad Dunn

    Brad Dunn Jet Boat Lover

    Messages:
    126
    Location:
    British Columbia
    Ratings:
    +37 / 1
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    Other
    Boat Length:
    24
    Out at lake for weekend. Surfing then all of a sudden one engine hitting 7200 and other hitting 6000. If I run port engine alone revs till cavitation. Starboard won’t hit 6000? Don’t see anything in propellers, they look in good shape. Any ideas. Removed all ballast and same issue.
     
  2. Jgorm

    Jgorm Jet Boat Addict

    Messages:
    975
    Location:
    San Diego / Colorado river
    Ratings:
    +619 / 15
    Boat Make:
    Yamaha
    Year:
    2004
    Boat Model:
    AR
    Boat Length:
    23
    Check engine light on? I'd start there and pull codes with a yds.
     
  3. Brad Dunn

    Brad Dunn Jet Boat Lover

    Messages:
    126
    Location:
    British Columbia
    Ratings:
    +37 / 1
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    Other
    Boat Length:
    24
    No engine codes. We docked it for awhile and I grabbed trailer. Wife said she hit over 30 and both engines were equal but was stumbling when coming to load on trailer. If nobody has any ideas I’ll try again this morning.
     
  4. Mohamed Z Sherif

    Mohamed Z Sherif Member

    Messages:
    49
    Location:
    Long Island NY
    Ratings:
    +18 / 1
    Boat Make:
    Yamaha
    Year:
    2018
    Boat Model:
    X
    Boat Length:
    24
    replace the plugs. my ski did the same with bad plugs
     

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