Discussion in 'Sport Cruisers' started by jim696, Feb 1, 2007.

  1. Siboatguy

    Siboatguy Active Member GOLD Sponsor

    Mar 28, 2016
    1999 Sea Ray 290 Sundancer
    2005 Sea Ray 320 Sundancer
    2005 Sea Ray 340 Sundancer
    Twins V-Drives
    8.1 Mercruiser
    New to us 2005 340.. Brought her home yesterday, Shake down cruise 3hrs... Stanford, Ct to NJ.... Nice ride back love the feeling of putting her on Plane for the first time again... Not sure why my pics are sideways gotta look into that....
    IMG_1024.jpeg IMG_1022.jpeg IMG_1023.jpeg
  2. Smashpjp

    Smashpjp Member GOLD Sponsor

    Aug 3, 2021
    Sandusky, Oh
    2001 340 Sundancer w/ 8.1L 496
    496 Merc 8.1L
    C0FB8689-9C20-4CC4-A647-B9020DA03EFB.jpeg Got all the cables and engines programed for VesselView mobile today. Cabling was critical to get the new ds3 software to program port engine. Next step is to get the nmea2000 gateway and the fueltank sensors wired and I think I have techno modified my 2001 as far as its non-dts self needs to go for the year. (Yes the ecm got fried in the past on my port engine)
  3. Stee6043

    Stee6043 Well-Known Member GOLD Sponsor

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    This will be a very regional question and there's not a lot of folks from the UK here.

    I don't know that anyone around here has done a diesel swap on a 340. That's a $$$$'s money upgrade. I hope you never plan to sell that boat!
  4. Smashpjp

    Smashpjp Member GOLD Sponsor

    Aug 3, 2021
    Sandusky, Oh
    2001 340 Sundancer w/ 8.1L 496
    496 Merc 8.1L
    Brand New Horizons 8.1s are about 20K a pop. If they are OK, why the swap. New Engines, new Exhaust, new electrical, new fuel system and tank mods plus install.

    If those 8.1s are V-drives... It wont even be an option due to the shaft angle...

    Its find a different boat time
  5. bfernald0

    bfernald0 Active Member

    May 18, 2020
    Marina del Rey, California
    340 Sundancer 2001
    8.2L Mercruiser ECT Horizons
    I looked into it when i repowered my 2001 340. The cost was around 100k-ie, prohibitive. Went with mercury 8.2s
  6. Todd Sevier

    Todd Sevier New Member

    Jan 12, 2018
    1977 SRV240 and 1988 340 sundancer
    350 pleasure craft , and twin 454 v drives
    I have a 1988 350 day with twin 454 with velvet drives. My port engine runs backwards rotation.
  7. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    Mercruiser stopped producing counter rotating engines sonetime in about 1988 or 1990. When the inventory of counter rotating engines was depleted, Sea Ray began supplying transmissions that had virtually the same ratio in both forward and reverse so they could achieve counter rotation by just turning one tranmission in forward and the other in reverse.

    Prior to then, Mercruiser produced counter rotating engines so many Sea Rays like yours came with port engines that ran backwards.
    Last edited: Oct 9, 2021
    Chris-380 and techmitch like this.

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