what kind of sterndrives are these

Discussion in 'Classic Sea Rays' started by tgilmore99, Jul 24, 2008.

  1. tgilmore99

    tgilmore99 New Member

    18
    Apr 6, 2008
    Jacksonville, Fl.
    270 Sundancer 1985
    350 OMC
    can somebody verify what kind of drives these are
    1985 270 at sundancer twin 5.7L OMC
    How do I tell what kind of drives they are?
     
  2. ghuskin

    ghuskin New Member

    Jul 10, 2007
    Lake St. Clair, DYC
    SRV225 Cuddy Cabin, 1983
    228 Mercruiser w/ pre-Alpha1 "R" Drive
    well, by your description, I'd say they are "OMC" sterndrives.
     
  3. tgilmore99

    tgilmore99 New Member

    18
    Apr 6, 2008
    Jacksonville, Fl.
    270 Sundancer 1985
    350 OMC
    are they called something? Stinger or Stringer?
    Looking for specs. I am having some issues. And need to look some things up. But not sure which manual to get
     
  4. ghuskin

    ghuskin New Member

    Jul 10, 2007
    Lake St. Clair, DYC
    SRV225 Cuddy Cabin, 1983
    228 Mercruiser w/ pre-Alpha1 "R" Drive
    Stringer.

    Apparently OMC only made the one drive from '78 to '85.

    Good luck!
     
  5. KayKook

    KayKook New Member

    Feb 19, 2008
    Mitten State
    89' 200CC Cuddy (Sold)
    175HP 4.3L V-6
    Yes..... good luck. Parts are still around, but getting harder to find, as well as someone to work on them.
     
  6. fc3

    fc3 Just another eclectic geek TECHNICAL Contributor

    Nov 12, 2006
    Northern NJ
    1999 Sea Ray 330DA
    Twin 7.4 MPI (310 propshaft HP) V-drives
    Twin Mercury Marine marinized 7.4L L-29 V8s
    Cast iron block w 4-bolt mains
    I doubt it's the stringer drive. Around the mid-80 OMC introduced a "Cobra" drive that would fit the Mercruiser cutout and installation points. At the time a boat builder could make one style of hull and sterndrive cutout. He could then install either a Mercruiser, OMC, Yamaha, or Volvo sterndrive.

    You probably have a Cobra. The bigger Cobra coupled with higher horsepower engines were King Cobras.

    Stringer drives used a huge nearly round transom cutout. The drive had a huge rubber ring for sealing. The drive torque was not transmitted to the transom, but to the engine and power coupling mounts which were attached to the stringer. Hence the name. If your boat does not have a great big cutout with a big exposed rubber gasket, it's not a stringer drive.

    Best regards,
    Frank C
     
    Last edited: Jul 24, 2008
    sfergson727 and Morpheus like this.
  7. tgilmore99

    tgilmore99 New Member

    18
    Apr 6, 2008
    Jacksonville, Fl.
    270 Sundancer 1985
    350 OMC
    fc3 you just explained alot to me. Mine drives do have the large almost circular cutout and a huge rubber gasket. At least now I can order a manual to help me. Thanks
     
  8. Cap10Pat

    Cap10Pat New Member

    189
    Jan 5, 2007
    Frank,
    Amazing knowledge!
     
  9. keokie

    keokie Well-Known Member

    Dec 27, 2006
    Arizona
    2002 310 Sundancer, Westerbeke 4.5 Genset
    496's, Bravo III's, 2.2:1 Gears
    They are OMC 800's. 1985 was the last year they were made. They run smoother and quieter than Mercs. They tilt higher, and turn much sharper. And they are way less reliable. It is very difficult to keep water out of the gear cases, they ran very hot which made wapring of the housing relatively common (which leads to broken shafts). They had other issues as well. The biggest challenge now is parts are getting more scarce.
     
  10. tgilmore99

    tgilmore99 New Member

    18
    Apr 6, 2008
    Jacksonville, Fl.
    270 Sundancer 1985
    350 OMC
    Is there a way to retrofit to a more popular unit ( common Parts)
     
  11. keokie

    keokie Well-Known Member

    Dec 27, 2006
    Arizona
    2002 310 Sundancer, Westerbeke 4.5 Genset
    496's, Bravo III's, 2.2:1 Gears
    There really isn't a cost effective way to change drives. Changing the gear case oil about every 20 hours of operation will help. Run them easy when you can as well. They don't like extended periods at high RPM.
     
  12. Dirtguy

    Dirtguy New Member

    92
    Jul 22, 2008
    Gilbert, Az.

    Would a drive shower be effective with controlling the higher temp?

    They work well on Mercs.

    DG
     
  13. SCORPIO

    SCORPIO Well-Known Member SILVER Sponsor

    Apr 7, 2008
    Delaware
    1989 300 DA
    Twin 5.7 Merc Alpha I
    What issues are you having? I just sold my '82 260 SXL that had a 260 OMC with 800 Stringer drive. I have some brand new parts as well as some good used parts. I also have a parts diagram book from '81 of '82 they didn't change much. I also have some tools I may want to part with. I've rebuilt my outdrive from the bottom up. They are relatively simple units and easy to work on if you are handy with tools and have some of the special tools like shim tools. Ebay has many parts/tools for sale many new old stock. A guy in Calif. named Werner Wessler is a retired service man with a large inventory of NEW parts and tools.
     

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