Official 280 Sundancer Thread

Discussion in 'Sport Cruisers' started by gredmer, Jun 26, 2008.

  1. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Sorry - I had a couple things on my mind as I was typing a response. Running with the fuel cap off eliminates the fuel vent from the mix... in case it is clogged - which you can still try doing. Either way, it is extremely unlikely that both of the electric shutoffs are partially failing. In case you missed it above, you DO NOT have traditional AS valves.

    The first thing to do is NOT just start replacing items because some forum, somewhere, suggests it. Rarely do you get lucky and fix the issue on the first try. Check your fuel pressure - that will help narrow things down tremendously. Once you know that, we can go further.

    You may have the "cool fuel three" issues that has plagued many Mercruiser motors around your model year. FYI... THAT you can go ahead and google - and also search on this forum... lot's of info about that. Or, it could be something else - but fuel pressure is a starting point.

    When is the last time you changed the fuel/water separators? And what is the condition/quality of your fuel? You can take a sample from the CF3 module.

    Another often overlooked item is a dirty hull bottom. It doesn't take much to cause the symptoms you are having.
     
  2. Zed

    Zed New Member

    9
    Jul 29, 2019
    2007 280 Sundancer
    Twin 4.3
    Dennis,
    Do I have fuel filters other than the fuel water separators?

    Thanks,
    Ed
     
  3. Cap’n Sparky

    Cap’n Sparky New Member

    25
    Jun 27, 2018
    Ft Belvoir, VA
    2004 280 Sundancer w/Genset. Purchased in 2018
    Twin Mercruiser 4.3 with A Drives
    Sorry, just saw this. I ran the 8 wire from the stereo located in the port cabinet just aft of the dinette, behind the facia inside the mirrored cabinet in the midship berth, drilled a hole next to the existing cable bundle through to the engine room, ran the cable along the forward engine room bulkhead from the port side to the starboard side, zip tying it to existing cable bundle along the way, routed it to the cockpit wet sink cooler drain hose, then inside the cooler storage locker along the aft edge, across and just above the locker access door, to the new remote location just forward of the locker access door and directly behind the helm seat. After successfully testing the remote, I went back and sealed the newly drilled hole between the midship berth and the engine room with JB Marine weld. Not sure if that was the best way to do it but I am very happy with the outcome. The new location is awesome for guests (primarily my daughter, who thinks she owns all rights to what music will be played) to fiddle with the stereo and not bother the Captain. And I have already enjoyed being able to easily silence distracting noise when necessary for safety and maneuvering.
     
  4. Cuins

    Cuins New Member

    16
    Apr 30, 2016
    New Hampshire
    2003 280 Sundancer
    496 Mercruiser
    Thank you that route may work.
     
  5. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Ed, I just noticed you have V6's... what type of fuel filter do you have? If you happen to have the one that looks like an oil filter, then that is good as it's not the "CF3" I mentioned above.

    You can double check your fuel lines, but I don't believe you have another fuel filter between the tank and the F/W separator (filter).
     
  6. Zed

    Zed New Member

    9
    Jul 29, 2019
    2007 280 Sundancer
    Twin 4.3
    Yes I have the water separating fuel filters that look like oil filters.

    I am at the boat now looking everything over. Very frustrating!!
    Thank You for your assistance!
     
  7. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    OK, let's verify some basics...

    - VERY clean hull bottom/running gear?
    - You're trimming up enough?
    - Dump the contents of the fuel filter into a clear, glass jar (spaghetti, for example). Observe for water.
    - How old is the fuel? Smells like varnish? How dark in color?
    - Take a run with the fuel cap off.

    Those are all quick and easy things to do, along with not costing anything. Good to start with that.
     
  8. Zed

    Zed New Member

    9
    Jul 29, 2019
    2007 280 Sundancer
    Twin 4.3
    Very clean hull, painted in the spring.
    Trimming good.
    Will dump fuel filters and observe. They were changed last year mid season
    Fuel is from last season before winter layup treated with K100 before putting away for the winter.
    Will run with cap off.
     
  9. Zed

    Zed New Member

    9
    Jul 29, 2019
    2007 280 Sundancer
    Twin 4.3
    Will try running with the cap off
     
  10. Zed

    Zed New Member

    9
    Jul 29, 2019
    2007 280 Sundancer
    Twin 4.3
    Dumped old fuel water separators and replaced with new.
    Gas looked clean, smelled good, light in color.
    123.jpg
     
  11. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    You need to see what your fuel pressure is when you hit the rpm wall
     
  12. Zed

    Zed New Member

    9
    Jul 29, 2019
    2007 280 Sundancer
    Twin 4.3
    Thank You I will check it out
     
  13. paul hsu

    paul hsu Member

    50
    Mar 15, 2018
    liberty landing , jersey city
    2008 280da sundancer
    twin 4.3 mpi Alpha drives
    the tracks have bolts in the engine compartment way up at the top in the back . I don't recall if there were one or two more in the cabin near the window by the rear bunk. I was never able to free the tracks, and they did not look bent when I removed them. I tried heating them, grease, hammering... nothing. I was not able to find the replacement tracks either.
     
    djungeljim likes this.
  14. paul hsu

    paul hsu Member

    50
    Mar 15, 2018
    liberty landing , jersey city
    2008 280da sundancer
    twin 4.3 mpi Alpha drives
    there are a lot of posts with regards to swapping the spotlight to led. I read one where someone purchased this led bulb and supposedly it fit without modification. I purchased it but have not had a chance to install it yet. I can let you know in the next couple of weeks if it goes well. I thought it was worth a try at under 40 dollars.


    PAR36 LED Work Light Xenon White 6000K(Eq 100W Incandescent lamp) Multipurpose Tractor Light Farming Industrial Offroad Lamp Outdoor Lighting Landscape Lighting(Spot)
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    Style: Spot

     
  15. paul hsu

    paul hsu Member

    50
    Mar 15, 2018
    liberty landing , jersey city
    2008 280da sundancer
    twin 4.3 mpi Alpha drives
    I know that this is not for everyone, but I had a lot of problems with my gauges. Replacements were more expensive than upgrading , so I decided to go for a semi glass helm, and installed the vessel view 903. I am very happy with the results, and now have a much more usable dash full of information. I have to credit the guys at tecnografics for their help. If anyone wants info on the process or templates, let me know.
    I was able to fit the axiom 12 where the old gauges were.
    IMG_6788.jpg IMG_6789.jpg IMG_6787.jpg
     
    Darrenfon and Ferris like this.
  16. Chrisvr6

    Chrisvr6 Member

    184
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    For those of you with 2002 5.0mpis, are the manifolds and risers dry joint?
     
  17. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Doubt it. All you have to do is look
     
  18. Chrisvr6

    Chrisvr6 Member

    184
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    You're right. Not dry joint. Everything i read states they started dry joint in 02 which is what year mine is.
     
  19. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Use dry-joints on your next RnR. A little more money but worth it
     
  20. Chrisvr6

    Chrisvr6 Member

    184
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    Didn't know i could switch over. Thanks
     

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