User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 9 of 9
  1. #1
    Join Date
    Mar 2004
    Location
    Newport Beach Ca.
    Posts
    235
    Thanks (Given)
    11
    Thanks (Received)
    13
    Likes (Given)
    113
    Likes (Received)
    78
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    2011 Merc 300xs loss of 1000 rpm 57 hours

    Single 2011 Merc 300XS on 2012 Bernico F-2 TS.

    1st trip to dealer for fuel leaking out of fuel filter chamber overflow and loss of 1000 rpm.
    Replaced entire fuel filter chamber. Test could not get on plane.

    2nd trip Replaced Fuel rails found factory flaw in 2 fuel diaphrams. Tested on trailer fuel pressure ok, cylinder drop test ok, throttle censor ok. Next day Catalina skirace practice got skier up no problem but hit the wall again at 5100 rpm 65 mph. Used to get 78 mph with skier 6150 rpm with 25 Trophy.

    3rd trip replaced compressor lake test with Merc. rep. lap top all readings good still only 5200 rpms. Stopped by shop on the way home for impeller change down a few psi from normal.

    Next day another Catalina practice run no change. Running out of time my skier from Australia arrives next Sunday.
    He is ready to run into the 70's even if its rough.

    Mercury has been great replacing anything that makes sense. Just glad its under warranty.

    Any thought? They might try reeds. They don't feel the coils or coil wires are an issue due to cylinder drop test.

  2. #2
    Join Date
    Jun 2004
    Location
    Morgan City, LA
    Posts
    365
    Thanks (Given)
    5
    Thanks (Received)
    20
    Likes (Given)
    230
    Likes (Received)
    105
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Had a air temp sensor out of range once did this. Check it with DDT make sure the range is good. Also do a leak down on cyls. There has been problems with # 6.
    2012-2013 DSRA PRO STOCK HIGH POINTS.
    2013 DSRA SUPER STOCK HIGH POINTS.
    2014 DSRA SUPER COMP HIGH PONTS.
    2015 DSRA SUPER COMP HIGH POINTS.
    2014,15,16 ODBA SUPER STOCK WORLD CHAMP.
    2016 ODBA SUPER STOCK HIGH PIONTS.
    2017 ODBA Modified World Champ

  3. #3
    Join Date
    Dec 2002
    Location
    upstate N.Y.
    Posts
    14,633
    Thanks (Given)
    8
    Thanks (Received)
    56
    Likes (Given)
    40
    Likes (Received)
    356
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    [B]well, when I lost 1000 rpms it was a bad coil which they[ replaced under warranty. [last Sept.] just had a repeat performance last week, another coil and back to all good! samari on this board said it's happening to a lot of 08/09 Optis./B]
    why ask me ?


  4. #4
    Join Date
    Apr 2001
    Location
    Western, Pennsylvania
    Posts
    163
    Thanks (Given)
    3
    Thanks (Received)
    1
    Likes (Given)
    4
    Likes (Received)
    3
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Wondering what finally fixed this problem that 28skaterCa. had???

  5. #5
    Join Date
    Aug 2012
    Location
    Tenkiller Lake, OK
    Posts
    520
    Thanks (Given)
    3
    Thanks (Received)
    34
    Likes (Given)
    137
    Likes (Received)
    208
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My bet is coils! My 28 Skater did the same thing with 300XS's as well as my 60HP four stroke. They both use the same coils. Sometimes the coil drop test wont show because they can fail intermittently or only under load. Merc. replaced all 6 coils on one motor under warranty. I always keep at least one spare. Check your plugs and it will probably show the culprit.

  6. #6
    Join Date
    Sep 2012
    Location
    Florida
    Posts
    440
    Thanks (Given)
    2
    Thanks (Received)
    15
    Likes (Given)
    9
    Likes (Received)
    84
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hardest thing is to figure out which coil it is!!!

  7. #7
    Join Date
    Sep 2020
    Location
    Mississippi
    Posts
    56
    Thanks (Given)
    0
    Thanks (Received)
    1
    Likes (Given)
    2
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I just replaced all 6 on my 300xs....

  8. #8
    Join Date
    Sep 2020
    Location
    Mississippi
    Posts
    56
    Thanks (Given)
    0
    Thanks (Received)
    1
    Likes (Given)
    2
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Mine still doesn't have any ass but found a lean cylinder. Goingbto send off injectors and pull head to inspect cylinder

  9. #9
    Join Date
    Nov 2019
    Location
    Canada
    Posts
    877
    Thanks (Given)
    58
    Thanks (Received)
    128
    Likes (Given)
    311
    Likes (Received)
    475
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DewRonInc View Post
    Mine still doesn't have any ass but found a lean cylinder. Goingbto send off injectors and pull head to inspect cylinder
    Not good! Let us know what you find! Might want to get the fuel rails checked out too while your in there.


    www.InjectorService.com
    Call/Text - 204-326-0390



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •