Official 2003.5-2008 340 Sundancer Thread

Discussion in 'Sport Cruisers' started by Zorba, May 17, 2013.

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  1. KevinC

    KevinC Well-Known Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives
    I don't think it would be a problem. I wouldn't think anything about having 4 people standing on the platform and that would be far more weight. As far as the hole shot and planing out it less that adding an additional passenger so again no problem.

    Now, my concerns would be if the dinghy mounts and attachments can properly handle the weight on the platform.

    -Kevin
     
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  2. KevinC

    KevinC Well-Known Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives
    Last weekends trip showed my starboard side needing a little more throttle and used a little more gas than normal but ran fine. I have noticed this before but was easier to track over a longer trip so I think it may be time for new plugs. Which ones did you go with and how did they work out so far?

    -Kevin
     
  3. M Prod

    M Prod Well-Known Member

    920
    Oct 6, 2017
    North Vancouver, BC
    2005 Sundancer 340
    Aquapro Dinghy w/ Honda 8hp
    Kohler 5KW Genny
    Raymarine Electronics
    8.1 Horizons /V Drives
    Thanks for the response on the dinghy Kevin. I figured that would be the case. I’ll talk to the hydraulic lift manufacturer for the rest. Thinking it’s going to be fine.

    So far as plugs, I got the NGK ones. I didn’t really notice any difference. My port engine has always burned a little more fuel than starboard and that didn’t change. I didn’t really have any issues beforehand ..just routine maintenance for me. They seem to do their job and I’m satisfied.
     
  4. JPGator

    JPGator Active Member

    215
    Apr 25, 2019
    2007 Sundancer 340
    Mercruiser 8.1S
    With the oppressive summer SoFla heat ive contemplated the same thing. Due to all my leaks I’ve learned you could run a vent all the way down the starboard side of the boat that could connect to the helm. How much temp or air pressure you would lose for that length of run is to be determined.
     
  5. liv2ryde100

    liv2ryde100 Active Member

    497
    May 17, 2012
    long island
    05' 340 dancer
    Twin 8.1's
    I switched from the delcos to the ngk’s. To be honest I haven’t really noticed a difference, I guess I’ll see how long they last. My boat is rarely loaded up with weight and I’m never pushing the 8.1’s so maybe that’s the difference
     
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  6. KevinC

    KevinC Well-Known Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives
    Not sure how much it is going to help. The A/C unit is going to turn on/off based on the ambient temperature measured on cabin return. Also without some kind of booster fan I am not sure you would get enough cool air out back to matter.

    Based on the the fact that there is no insulation and direct sunlight you probably would need a bigger unit just to handle the cockpit area alone.

    -Kevin
     
    JPGator likes this.
  7. KevinC

    KevinC Well-Known Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives

    Which model NGKs did you go with? I might just stay with the AC Delco's then if there is not much of a difference. Did you use any anti-seize on the threads? If so what type is recommended?

    -Kevin
     
  8. liv2ryde100

    liv2ryde100 Active Member

    497
    May 17, 2012
    long island
    05' 340 dancer
    Twin 8.1's
    Maybe u could find out what size units they put in the 440 dancer cockpit. Also if thing I to the same water pump u may have to upgrade that for better water flow. Then build a manifold for the overboard discharge, then tie a drain line in for condensation.
     
  9. mblockb

    mblockb Member

    33
    Oct 12, 2018
    South East IN
    2004 340 Sundancer
    1996 Mariah Z 209 5.7L Sold
    C&C MEGA 30 Sold
    1976 Chrysler Buccaneer 22 Sold
    8.1L V Drives
    Thanks, do you have a pic of this value?
     
  10. M Prod

    M Prod Well-Known Member

    920
    Oct 6, 2017
    North Vancouver, BC
    2005 Sundancer 340
    Aquapro Dinghy w/ Honda 8hp
    Kohler 5KW Genny
    Raymarine Electronics
    8.1 Horizons /V Drives
    There are two of these on top of the starboard fuel tank top of the bulkhead above your electrical panel to starboard. There’s also one on the port side for the port engine. On starboard. one is for the starboard engine and one is for the generator. There’s a black knob with a flat head connection. (Arrow) Turn this 180 degrees to bypass. I believe the one I drew the arrow to is for the engine, so you’ll want to turn the one to the right of that. Not certain though..try them both. It won’t hurt anything.

    B0F0B545-AC57-4E74-9F72-6F63ED68F41C.jpeg
     
  11. outobie

    outobie New Member

    23
    Apr 26, 2019
    2006 340 DA Sportsman
    87 Tiara 270...For Sale
    8.1 Horizon Vdrive,
    Twin Mercruiser 5.7 alpha 1 gen2
    That’s it! The generator one is the one on the left side of the starboard tank

    Rotate the knob 180 degrees so the arrow points away from the “normal” mark etched on the body.. on mine “normal” was pointing port and in bypass mode the arrow points starboard
     
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  12. outobie

    outobie New Member

    23
    Apr 26, 2019
    2006 340 DA Sportsman
    87 Tiara 270...For Sale
    8.1 Horizon Vdrive,
    Twin Mercruiser 5.7 alpha 1 gen2
    My thinking was to add a second unit to the cockpit.

    I was wondering if the wiring was already there as there is an unused port on the AC control panel that says “cockpit AC”.

    Was cockpit AC an option?

    None of this is difficult just wondering if someone had already done the homework to figure the install out. Surely I’m not the first one to do this...wondering as mentioned above if anyone has figured out the correct installation pieces; like

    what’s a good cockpit mounting location,

    can you piggyback into the cabin through hull,

    what size water pump is needed.

    Did you route the condensation drain to a new discharge through-hull or tap into an existing one. etc...
     
  13. KevinC

    KevinC Well-Known Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives
    I am thinking the panel is shared on models and do not think the aft AC was an option - I could be wrong - but never saw it discussed in the owner manuals or parts manuals.

    I think the only possible location based on size would be under the port seat but that leaves limited venting options. I am not sure if you could or even want to install it in the engine compartment. I don't know if these would be safe - but if they are another option would be forward of the generator.

    For condensate I would just plump another through hull near the unit. I do not think wiring is there so you would have to start from scratch.

    The pump and capacity would be based on what you have installed and the needs of the new unit. I would check the specs on the new unit and ask the manufacturer's support team. You will also need to wire in another control box to the pump.

    Even then when done all you cold air is going to simply escape and get heated up quickly. I think the AC unit would probably be running non-stop without chance of catching up and that would result in a shortened life.

    Just my thoughts.

    -Kevin
     
  14. outobie

    outobie New Member

    23
    Apr 26, 2019
    2006 340 DA Sportsman
    87 Tiara 270...For Sale
    8.1 Horizon Vdrive,
    Twin Mercruiser 5.7 alpha 1 gen2
    I’m discussing having lined canvas made to add some insulating properties
     
  15. KevinC

    KevinC Well-Known Member

    Feb 25, 2011
    Long Island, NY
    2004 340 Sundancer
    1988 Proline Center Console - 90hp Mariner/Mercury
    1969 Boston Whaler
    Twin 8.1 V-drives
    Personally I do not think adding thicker canvas is going to help. Once the eisenglass is up it going to turn into a green house. If the eisenglass is off the cold air is going to escape. If there was a hardtop with a 2 inch baffle you may be able to get some insulation and keep in under control. The lined canvas would still transfer the heat in.

    -Kevin
     
  16. dagerringer

    dagerringer New Member

    13
    Apr 2, 2019
    340SDA Sundancer 2003
    8.1S Horizon
    Need suggestions on where to look for canvas hardware/canvas to convert to camper style. I currently have the slant cover, the PO had the camper style at one point, which I have the old canvas, but no hardware for it. Thoughts?
     
  17. JPGator

    JPGator Active Member

    215
    Apr 25, 2019
    2007 Sundancer 340
    Mercruiser 8.1S
    Look right above your post.
    Kevin at Cove Marine
     
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  18. dagerringer

    dagerringer New Member

    13
    Apr 2, 2019
    340SDA Sundancer 2003
    8.1S Horizon
    Well that's just too easy.... ;-)
     
  19. mblockb

    mblockb Member

    33
    Oct 12, 2018
    South East IN
    2004 340 Sundancer
    1996 Mariah Z 209 5.7L Sold
    C&C MEGA 30 Sold
    1976 Chrysler Buccaneer 22 Sold
    8.1L V Drives
    The water fuel separator filter was loose. Tightened it up and she fired right up! I am now a boat buck ahead!
     
    M Prod likes this.
  20. Korkie

    Korkie Active Member SILVER Sponsor

    549
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags
    Bravo III Drives
    Good to hear. Sometimes it's just something as simple as that.
     

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