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SX210 won't go over 37

Discussion in 'Yamaha AR210, SX210, 212X & 212SS' started by Steve Levine, Jul 16, 2017.

  1. Steve Levine

    Steve Levine New Member

    Messages:
    3
    Ratings:
    +0 / 0
    Boat Make:
    Yamaha
    Year:
    2012
    Boat Model:
    SX
    Boat Length:
    21
    Hi
    I bought a 2012 SX210 with 77 hours on it.
    I'm having 2 problems
    The starboard engine is saying check engine 2 out of three times when it starts. When i turn it off and restart it, sometimes 2 times, the warning goes away and it runs fine
    I'm also having a maximum speed of around 37 MPH, even with 2 people and half a tank
    Both engines are running pretty close in rpms and are at just over 8K when at full throttle
    Both engines have plenty of water coming through cooling
    I replaced the plugs and changed the oil in the winter. Both air cleaners look fine
    Without taking pumps apart the impellers look OK but I'm thinking maybe there is something wrong with the starboard pump or both
    I believe the rings are all metal - no plastic wear rings
    Any ideas would be helpful
     
  2. jawsf16

    jawsf16 Jetboaters Commander

    Messages:
    1,638
    Location:
    Prosper, TX
    Ratings:
    +1,176 / 17
    Boat Make:
    Yamaha
    Year:
    2010
    Boat Model:
    AR
    Boat Length:
    24
    Are you at high altitude or sea level? Those motors drop off performance above about 3000 MSL.
     
  3. bronze_10

    bronze_10 Jetboaters Commander

    Messages:
    2,066
    Location:
    Raleigh / Wake Forest Area..
    Ratings:
    +1,615 / 18
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    SX
    Boat Length:
    23
    Are the clean out plugs all the way in.. if they have partially dislodged but became bound up in the tube it may be looking a little thrust.... atleast that's how it works in my mind which isn't saying a lot!
     
  4. Steve Levine

    Steve Levine New Member

    Messages:
    3
    Ratings:
    +0 / 0
    Boat Make:
    Yamaha
    Year:
    2012
    Boat Model:
    SX
    Boat Length:
    21
    Hi

    We are on the east coast - long Island-so no high altitude issues
    I haven't checked the plugs but both engines are spooling up at just over 8100 rpms
     
  5. bronze_10

    bronze_10 Jetboaters Commander

    Messages:
    2,066
    Location:
    Raleigh / Wake Forest Area..
    Ratings:
    +1,615 / 18
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    SX
    Boat Length:
    23
    If the clean out plugs are not seated correctly the engines will still spin up...
     
  6. jawsf16

    jawsf16 Jetboaters Commander

    Messages:
    1,638
    Location:
    Prosper, TX
    Ratings:
    +1,176 / 17
    Boat Make:
    Yamaha
    Year:
    2010
    Boat Model:
    AR
    Boat Length:
    24
    RPMs are correct. Do they sound rough when idling? Sometimes a spark plug change is the magic cure for motor issues. Did you fog the engine in the winter? If so it can foul the plugs.

    Any large algae build up on boat? Had a member lose 10-15 mph after wetbslipping for awhile.

    Any members around your location could help with a YDS to read the code. Also might be able to count the flashing lights with the check engine light.

    Just tossing out ideas.
     
  7. jawsf16

    jawsf16 Jetboaters Commander

    Messages:
    1,638
    Location:
    Prosper, TX
    Ratings:
    +1,176 / 17
    Boat Make:
    Yamaha
    Year:
    2010
    Boat Model:
    AR
    Boat Length:
    24
  8. Steve Levine

    Steve Levine New Member

    Messages:
    3
    Ratings:
    +0 / 0
    Boat Make:
    Yamaha
    Year:
    2012
    Boat Model:
    SX
    Boat Length:
    21
    Hi and thanks for ideas
    I keep the boat out of the water in a high and dry (rack) so no algae
    I remove and reinstall cleanout plugs evry outing so they are fine
    Engine was fogged in fall but I replaced plugs after oil change in spring
    Engines are running nice and smooth
    I'm thinking I need to pull the starboard pump to look for issues with ring or Impeller
     
  9. jawsf16

    jawsf16 Jetboaters Commander

    Messages:
    1,638
    Location:
    Prosper, TX
    Ratings:
    +1,176 / 17
    Boat Make:
    Yamaha
    Year:
    2010
    Boat Model:
    AR
    Boat Length:
    24
    Yep they mat be the case. First I would see if you can check the codes. Sounds like you have considered all of the easier solutions. Codes may give you some SA on the issue too.
     
  10. Seadeals

    Seadeals Jet Boat Junkie

    Messages:
    469
    Location:
    Greenville, South Carolina
    Ratings:
    +424 / 6
    Boat Make:
    Yamaha
    Year:
    2006
    Boat Model:
    SX
    Boat Length:
    21
    Have you confirmed the impellers are the stock part/model numbers?
     

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