Official 280 Sundancer Thread

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

  1. Kurt

    Kurt New Member

    623
    May 3, 2008
    State Park Marina Table Rock Lake
    2005 280 DA
    Twin 5.0 Merc/B3's
    Kohler 5K gen
    Thankyou Sir!
     
  2. howardedson

    howardedson New Member

    6
    Jan 13, 2017
    Seattle, WA
    280 Sundancer 2007
    496 Mercruiser w/Bravo III drive
    Hey all. Looking for advice on a mechanical issue on my 2005 280 Sundancer (single 496, bravo III, duo prop). I was cruising at maybe 22 knots @ 3500rpm when very suddenly rpms dropped to about 1800.

    Engine starts and idles normally, and in neutral it powers up to the 'overspeed' alarm (seems healthy in neutral). But we can't get above 12 knots even at full throttle, and RPMs won't go much above 2000). I trimmed the drive up and tried to visually inspect the props from the swim platform (didn't dive in) and I don't see any problem.

    My best guess is we got some fishing line tangled up and it's down in the hub between the props and the outdrive, and that I'll need to haul the boat out, remove the props and inspect for damage. My dad suggests I try replacing the fuel filter first (since that's cheap, might need to be done anyway).

    Any advice before I haul it out?

    Any advice?
     
  3. importmonkey

    importmonkey Member SILVER Sponsor GOLD Sponsor

    465
    Jul 9, 2015
    Middle River, MD
    2007 44 Sundancer
    QSC 500s
    Impeller?

    Sent from my SM-G930V using Tapatalk
     
  4. tony1b2000

    tony1b2000 Member SILVER Sponsor

    82
    Oct 10, 2007
    Salem MA
    350 Sundancer 2010
    496 Mag Seacore Mercruiser , Bravo III
    Do you know if the alarm is in fact working under the dash? If you are not sure, you could try emptying the drive lube into a container. The alarm code should start beeping I think every 2 mins on that issue. If you do not get an alarm ( beep ) that the first problem to fix!
    That said, there are many sensor on that boat that could keep you engines from going full throttle. Please check out these 2 links as they have all the failures, power loss, etc..
    http://img.photobucket.com/albums/v682/46auto/MercCodes1.jpg
    http://img.photobucket.com/albums/v682/46auto/MercCodes2.jpg

    Hope that helps,
    T

     
  5. gsmallwood

    gsmallwood Member

    166
    Jul 14, 2009
    Gainesville, Ga.
    2003 280 Sundancer
    T 4.3 A1
    Kohler 5k gen
    How hard is it to change the plugs on the 4.3 V6 motors?
     
  6. PMC

    PMC Active Member

    Apr 10, 2009
    Long Island, NY
    2001 40 Sedan Bridge
    Cummins 6CTA
    Easier than my port side impeller ;) Do it by feel, you'll be able to reach the plugs.
     
  7. Lazy Daze

    Lazy Daze Active Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    It's very easy. They just spin right out. Oh, wait, you're probably more interested in how easy/hard it is to GET to them! ;)

    Like Paul said, it's mostly by feel. Here's a few tips...

    -- Sometimes there is a very tight tolerance between the underside of the manifold and your socket. I have a socket that I ground down to be thinner than a "thin wall" socket and that has come in handy.

    -- Be sure to check the gap.

    -- To reinstall, get a short length (8"-ish) of rubber hose that fits just snug (not tight) over the insulator. Use this to reinsert/screw in the plug. If you happen to start out cross-threaded, the hose will just spin around the insulator and you won't damage any threads. Besides, it's just easier to start them that way.
     
  8. Danny Troy

    Danny Troy New Member

    786
    Oct 8, 2009
    Candlewood Lake, CT
    2003 280 Sundancer
    496MAG w/genset
    I had a similar situation. Turned out to be a partially closed seacock. I have thru-hull cooling, and I inadvertently sat on the seacock handle while doing some other work in the engine compartment. I believe the water pump has a flow sensor and it knocks down the RPMs dramatically, so you can limp back to port. Once I opened the seacock fully all was well. I didn't know if I overheated the impeller, and changed it a short time later (a real fun job!!!!)
     
  9. Chrisvr6

    Chrisvr6 Member

    126
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    Has anyone ever had a water pressure sensor fault (2 beeps per minute)? Had my 02 5.0 mpi b3 scanned and had a sea water ckt hi fault. Swapped wps from the other motor and its still beeping. Now I'm thinking i need to get the mechanic to come back and clear it?
     
  10. scoflaw

    scoflaw Active Member SILVER Sponsor

    Aug 10, 2011
    cape cod mass
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    There is info out there that the wps had an insufficient ground in some cases and people were running a dedicated ground wire to it. Something to think about, not saying it's your issue.
     
  11. Chrisvr6

    Chrisvr6 Member

    126
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    Very interesting. Will check the ground. Still not sure though if its fixed by swapping the other wps over and maybe its just a stored fault. Will try disconnecting batteries for awhile also. Thanks.
     
  12. howardedson

    howardedson New Member

    6
    Jan 13, 2017
    Seattle, WA
    280 Sundancer 2007
    496 Mercruiser w/Bravo III drive
    Thank you. I'll confirm seacocks are fully opened before doing anything else!
     
  13. Stroh

    Stroh New Member

    22
    Apr 12, 2015
    SW Florida
    2006 Sundancer 240 "Toy Boat"
    5.0 MPI 260hp Bravo III
    I currently have a 2006 240 Sundancer and would like to spend more time on it but sleeping is literally a pain as the v-berth is not quite long enough for my average-sized 5' 10" frame.

    I am thinking of upgrading to a 280 and was wondering if anyone can tell me how much longer (if any) the 280 v-berth is versus the 240 v-berth?

    Seems the older models had a dinette on port side and newer models don't. How does that impact the v-berth size (length)?

    Appreciate any other insight into the sleeping accommodations between the 240 and the 280. Thanks
     
  14. sparky90731

    sparky90731 New Member

    20
    Mar 27, 2016
    los angeles
    2003 280 Sundancer
    Kohler gen, raymarine quantam
    Fusion av650, 24in smart tv
    Twin 4.3
    Mine was iac sensor same alarm
     
  15. gsmallwood

    gsmallwood Member

    166
    Jul 14, 2009
    Gainesville, Ga.
    2003 280 Sundancer
    T 4.3 A1
    Kohler 5k gen
    Is the round red top RULE 1100 bilge pump the non-automatic type that has to have a float switch or is it a automatic that comes on every 2 1/2 minutes and takes 1 second to check for water. I need to replace mine and am not at the boat to see what kind it came with.
     
  16. TheGoodLife

    TheGoodLife New Member

    14
    Jun 22, 2012
    Babylon, Ny
    2003 Sea Ray Sundancer 280da
    Twin Mercruiser 4.3 mpi w/ alpha drives
    I have a 2003 with the 4.3 engines. I was just coming on here to ask the exact same question. After 20 minutes of the boat running I get the 2 beeps/min alarm. Nothing shows on the mechanics computer. He thought it might be the block pressure sensor and it was not. I can not figure this one out. Gauges reading perfect, gear oil is good.
     
  17. Chrisvr6

    Chrisvr6 Member

    126
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    Impellers causing an actual low water pressure maybe?
     
  18. Chrisvr6

    Chrisvr6 Member

    126
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
  19. powerdbygarrett

    powerdbygarrett Member

    55
    Feb 27, 2014
    Forked River, NJ
    2006 Sundancer 280, Ipad Navi, Full JL Sound System
    Dual 4.3L Mercruisers
    Hi everyone! If survey checks out, next week I should be a 2006 280DA owner. Extremely excited. Marina is already picked out, Full JL sound system has been shipped.

    One thing I know the girlfriend will be complaining about is the lack of a bow sunpad. I have tried to do some searching around but coming up lacking. Anyone have some pictures or suggestions as to how I can buy/make one.

    Thanks!
     
  20. Chrisvr6

    Chrisvr6 Member

    126
    Sep 6, 2016
    Chicago
    2002 280da
    Twin 5.0mpi
    I'm getting one of these for the wife. Look at this on eBay http://www.ebay.com/itm/251984595322
     

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