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What engines/drives/props

Discussion in 'Newbie Lounge - NEW' started by allatsea, Oct 1, 2020.

  1. allatsea

    allatsea New Member

    5
    Oct 1, 2020
    Boatless
    Boatless
    Hi all, been in sailboats for 60 years - time for a change and more comfort!
    Rather than taking a long time to go nowhere slowly, I now need to go distance quickly with a full load and stay overnight. I could trawl the forum for hours and still be none the wiser so here goes.... for either 370 or 380 Sea Rays, I see adverts with twin 5.0 mercruisers quoting a combined HP of anything from 420 HP up to 870 HP. Can I ask what combo I need to look for when searching the ads and what specific details in the engine bay would identify the higher output engines. Thanks
     
  2. Espos4

    Espos4 Well-Known Member

    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    Obviously, Combined HP would be adding the HP of both motors.

    generally, 5.0 motors are in the 240-260 HP range each for a total of 480-520.

    5.7 motors 260-300 each

    6.2 motors 320 hp each

    The 7.4’s approach the high 300’s in hp while the 8.1 motors are where you’ll potentially be over 400 HP each.
     
  3. Golfman25

    Golfman25 Well-Known Member

    Sep 12, 2009
    IL
    281
    V8
    370s and 380s should come with big blocks (7.4s and 8.1s) and v-drives.
     
    Mjresq4, Chris-380 and dtfeld like this.
  4. Henry Boyd

    Henry Boyd Well-Known Member GOLD Sponsor

    Apr 24, 2007
    Newburyport, on the peaceful and serene Merrimack
    ‘09 Sabre 38 Hardtop Express “Serenity”
    Volvo D6 w/IPS450 Pods
    Keep in mind you are getting into a size of boat that can make sense to power with diesels. One set of the engines you queried were commonly used on smaller boats, i.e. twin 5.0s were a common on the 280, so not only will the performance be less than stellar, but fuel consumption will be extreme.
     
  5. JimG

    JimG Well-Known Member

    Nov 4, 2008
    Southern WV
    2007 310 DA
    Kohler 5ECD
    Twin 350 Mags
    Raw Water Cooled
    V-Drives
    Mjresq4 likes this.
  6. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    If you see a 370/380 advertised with a 5.0 merc it was either listed in error or it was an engine swap gone horribly wrong :)
     
    Snapon24 and Chris-380 like this.
  7. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    And for the record...trawling this forum for hours is worth a mint if new to Sea Ray or power boating in general. I wouldn't suggest trying to short-cut the learning curve...
     
    Mjresq4 and Chris-380 like this.
  8. allatsea

    allatsea New Member

    5
    Oct 1, 2020
    Boatless
    Boatless
    Thank you for the replies - appreciated.
    And for the record...trawling this forum for hours is worth a mint if new to Sea Ray or power boating in general. I wouldn't suggest trying to short-cut the learning curve... Think that is probably the best advice that I must heed - thanks Stee.

    For the last 5 months I have been idly looking at the adverts whilst off during the coronavirus and concluded that the Sea Ray of the early '90's was something that looked better than anything else in a classic way and would probably have a good network of suppliers as well as electrical, technical and mechanical support. So I have only got that far.
    Another question please... I see inboard/outdrive on boats for sale but sense that V drive is preferable. However, at $17,000 as an option when new, are V drive 370/380 like hens teeth?
    Thank you.
     
  9. Golfman25

    Golfman25 Well-Known Member

    Sep 12, 2009
    IL
    281
    V8
    370/80 are big boats to push around with outdrives. I doubt they where even available. Most will be v-drive. Express version will be straight drives.
     
    Chris-380 likes this.
  10. allatsea

    allatsea New Member

    5
    Oct 1, 2020
    Boatless
    Boatless
    Quote "Yes, big blocks or diesels for sure" Unquote.
    I'm pleased to hear that I am only likely to find a 'V' drive but I hadn't thought of diesels and yet my car is a big diesel!
    Which diesels compare with the 7.4 and 8.1 gas engines please?
    Thank you.
     

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