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Thoughts on L590 with MAN engines?

Discussion in 'Sea Ray Yacht' started by jason fifield, Mar 9, 2025 at 1:29 PM.

  1. jason fifield, Mar 9, 2025 at 1:29 PM
    #1
    jason fifield

    jason fifield New Member

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    I had written off the 590 since I did not want pods, but has anyone had one or been on one with the MAN engines?
  2. ranger58sb, Mar 10, 2025 at 8:47 AM
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    ranger58sb

    ranger58sb Senior member

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    Dunno anything about the boats, but...

    I mostly like our MAN CRM-900s, and I guess the 1000s would be similar, newer, even better.

    OTOH, the V-8 configuration does a number on engine room access. Crabbing along sideways, now low, high next... gets a bit old for reaching anything forward of our engines. (I suspect the newer I6-800s or similar would be niftier, and lots lighter too.)

    -Chris
  3. Capt Ralph, Mar 10, 2025 at 12:01 PM
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    Capt Ralph

    Capt Ralph Senior Member

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    I remember working on a 58SB with the V8/900CRMs. Ahead of the port engine was the Vac/Flush tank and water heater ahead of the stb.
    I remember having to corkscrew my back to pass between those engines to go forward.
    The inline 6s from MAN could fix this but they are longer.

    I think the 1000s are near the same V8 engine. Larger air cooler and heat exchanger I do suspect.
  4. mapism, Mar 10, 2025 at 3:50 PM
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    mapism

    mapism Senior Member

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    They are actually more different than you would think at first glance, CR.
    In fact, the 900 was the last of the the "old" V8 blocks (128x142mm bore/stroke), after which they redesigned the basement (for the V8s as well as the V12s, while the V10 was phased out), introducing a different crankshaft (157mm stroke) and consequently higher displacement.
    I believe the external dimensions were only marginally affected, though.
  5. Capt Ralph, Mar 10, 2025 at 4:14 PM
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    Capt Ralph

    Capt Ralph Senior Member

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    Thank you for your update Brother Mapism. I have not been around the MANs for a while now. I was just SWAGing on the extra HP.
    I kind of had a luv-abuse relationship with them.
    I luved them-they abused me. Like my second wife.
  6. mapism, Mar 10, 2025 at 4:19 PM
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    mapism

    mapism Senior Member

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    :D
  7. jason fifield, Mar 10, 2025 at 6:43 PM
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    jason fifield

    jason fifield New Member

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    thanks for the replies. I know the L590 is considered the least desirable of the L class (IMO anyways), but that is mostly due to the triple engine/pod configuration. Aside from the access issues (and cost/maintenance), it seems it should be a much better boat with MAN 1000s and shafts. IDK if any of the latter (all MAN 1000 options were 2017/2018) L590s had hull issues or if that was more of a L650 issue.
  8. Capt Ralph, Mar 10, 2025 at 6:50 PM
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    Capt Ralph

    Capt Ralph Senior Member

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    Please do some searches here on YF.
    I don't think many here like any of the L class no matter what power options were involved.
  9. jason fifield, Mar 10, 2025 at 6:54 PM
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    jason fifield

    jason fifield New Member

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    I have done a lot of research. I know about hull issues, etc as Sea Ray was having $ issues. I thought the later L550s were better? Not a lot of options for 55-60 ft flybridge with Cats/shafts with good floor plan IMO. Boat will be in MX most of the time so shafts are preferred.

    Also water in Cabo/ sea of cortes is pretty mellow and harbor master will close the marina if bad weather is expected.
  10. Capt J, Mar 10, 2025 at 10:49 PM
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    Capt J

    Capt J Senior Member

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    No the 590 takes the cake. Overweight, and very thirsty with 3 pods. It cruised 21-22 knots was wet, overweight and burned just under 80 gph this is for an express, the Flybridges were even worse at slow speeds if you turned hard the whole boat would lean and felt like you were going to roll over. I ran about 9 or 10 of them. The smaller one with shafts was actually a decent running flybridge.

    I've put some good hours on the Man 1000s, they're great motors, smooth, powerful, etc. But I ran them at the 1100HP level.
  11. mapism, Mar 11, 2025 at 4:22 AM
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    mapism

    mapism Senior Member

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    The only 1100hp MAN made were the very last V10 iteration, with common rail, and before that one of the mechanical V12.
    But back in those days the V8 topped at 800hp (which is what power my boat).
    This redesigned 16 liters V8 block was never available as 1100hp rating.
    There's a 1000 and a 1200, and eventually they also introduced a 1300hp version.
    Which unless I missed some other announcements is currently their higher power density engine.
  12. jason fifield, Mar 11, 2025 at 11:06 AM
    #12
    jason fifield

    jason fifield New Member

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    Thank you for the replies....
  13. ranger58sb, Mar 11, 2025 at 11:21 AM
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    ranger58sb

    ranger58sb Senior member

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    Looks like the L590 and the older 58 SB layouts are similar. Latter is straight shafts and the hull is solid beneath the waterline; dunno about the L590 hull.

    The Cummins 8.3s would seem credible, but 3x isn't great. I guess the pods would be Zeus, apparently not so successful in the marketplace.

    -Chris
  14. DOCKMASTER, Mar 11, 2025 at 2:51 PM
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    DOCKMASTER

    DOCKMASTER Senior Member

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    Out of curiosity, what do you consider a good floor plan? Are you considering any true Sportfish boats? I know of a fantastic 54’ Donzi with new CAT C-18s (and everything else new) that’s coming to market soon. It’s a perfect Cabo boat.
    Capt Ralph and MM3 like this.
  15. Capt J, Mar 11, 2025 at 4:51 PM
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    Capt J

    Capt J Senior Member

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    They made the new V8's in both 1000hp and 1200hp, I've run both of those and put lots of hours on the 1200's (typo when I put 1100HP earlier) and have also taken care of a boat with 1100hp v10 MANS since 2011 and it too has been a great motor. I believe the MANs in 590 are the newer style v8 at 1000 hp but either motor is great.