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Repowering a 54' Donzi Sportfish

Discussion in 'Donzi/Roscioli Yacht' started by DOCKMASTER, Sep 5, 2019.

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  1. DOCKMASTER, Jul 27, 2020
    #341
    DOCKMASTER

    DOCKMASTER Senior Member

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    I'm glad you enjoyed it. I really appreciate all the great input and feedback I received. I hope I am giving back as much info as I am receiving. There is many years of experience and knowledge here and I am grateful to those that share.
    John Hearin likes this.
  2. Capt Ralph, Jul 27, 2020
    #342
    Capt Ralph

    Capt Ralph Senior Member

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    100104~3.GIF
    Out Standing.
    Please keep us all up on everything.
    Your post have been the highlight of many a night.

    Thank you for sharing your ship with us.
    ,Ralph
  3. chesapeake46, Jul 28, 2020
    #343
    chesapeake46

    chesapeake46 Senior Member

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    Yeah, especially this part.
    Good luck with her.
  4. DOCKMASTER, Jun 4, 2023
    #344
    DOCKMASTER

    DOCKMASTER Senior Member

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    Update after a few years now. First year I was not able to do much due to COVID travel challenges. Used the boat a bit more last year. Just trialed her after the winter hibernation a few days ago. I have 170 hrs on the CATs now, 250 hours on the 9kw gen and 60 hours on the 20kw. With fresh bottom, 1/2 load fuel and 1/2 load of water I made 30 knots cruising at 78% load on the CAT panels. The ZF controls showed 81% throttle position. 44/gal/hr per side. Had a little breeze pushing me. So seems as things get broken in and I’m finding the sweet spot with tabs and such it has gotten better. Heck maybe the new Awlcraft paint helped reduce air friction .

    I have plans to use the boat more this summer than I have in past few years so hoping all goes well.
    chesapeake46 and MM3 like this.
  5. mapism, Jun 4, 2023
    #345
    mapism

    mapism Senior Member

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    Sounds great, congrats!
    What is the corresponding RPM, out curiosity?
  6. DOCKMASTER, Jun 4, 2023
    #346
    DOCKMASTER

    DOCKMASTER Senior Member

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    believe it was 2075
  7. PacBlue, Jun 5, 2023
    #347
    PacBlue

    PacBlue Senior Member

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    Congratulations, keeping it under 90 gph for a 30 knot cruise in a vessel your size is a win!
  8. mapism, Jun 5, 2023
    #348
    mapism

    mapism Senior Member

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    Hi PacBlue, been a while since your last posts, welcome back.
    I'm surely not alone in missing your no-nonsense contributions to technical debates!
    leeky likes this.
  9. Cad22000, Mar 15, 2026 at 10:29 PM
    #349
    Cad22000

    Cad22000 New Member

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    Hello Dockmaster, I have been working on a 1990 54 Donzi, looking at your repower of your vessel . It looks very clean on the installation and routing was tidied up very amazing job. I'm in the process of rebuilding my engines and looking at different things to try to organize the machinery space to flow better for maintenance and access and clean it up. was wondering if you have some more photos and locations of major components as I am wanting to move pumps, A/C chillers and batteries etc. to a more organized layout with the limited space. also, the cross beam under the engine oil pan between the stringers, did you cut that down to accommodate removal of the oil pans in the future? mine will not allow me to drop the oil pan fully.
  10. DOCKMASTER, Mar 15, 2026 at 10:42 PM
    #350
    DOCKMASTER

    DOCKMASTER Senior Member

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    What engines do you have? Do you not have two piece oil pans that allow removal? My a/c chillers were never in the engine room. They are in the fwd machinery space located between the staterooms. My starting batteries are in the center of the engine room between the engines. My house batteries are under the stairs into the engine room from the cockpit. I have three more batteries after of the starting batts between the engines.
  11. Cad22000, Mar 15, 2026 at 11:00 PM
    #351
    Cad22000

    Cad22000 New Member

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    Thanks for the reply, the boat was Repowered in 2001 with MAN D2842LE404 at 1300Hp per side. I purchased the boat in 2024, The oil pans are one piece and i have yet to find a 2 piece variant to replace. both A/C chillers are located behind the port engine, with battery chargers on the rear wall. I have 4 8D batteries between the engines. the House batteries are located underneath the generator behind the starboard engine, the generator is mounted between the engine stringers. i was looking at relocating batteries under the steps going into the engine room. i have not been in the forward machinery space to see how much room is underneath. from the two hatches in the floor i see water tanks. The rear Fuel tank takes up all the room in the Aft so relocating things there is not an option. See the photos, it is embarrassing however it is a project and in process. Port AC.jpg Starboard Generator.jpg
  12. DOCKMASTER, Mar 15, 2026 at 11:04 PM
    #352
    DOCKMASTER

    DOCKMASTER Senior Member

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    Is that a sunken recovery? You are brave to take that on.
  13. Cad22000, Mar 15, 2026 at 11:13 PM
    #353
    Cad22000

    Cad22000 New Member

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    Yes, it is. Brave, haha. More mistake then anything else. However taking small bites, now I'm at the point i need to start on the locations of electrical and hardware so looking at options to plan it out. I have the port engine with new pistons, rod bearings, liners and heads machined.
  14. DOCKMASTER, Mar 15, 2026 at 11:24 PM
    #354
    DOCKMASTER

    DOCKMASTER Senior Member

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    I have lots of photos but they are on my iPad or phone and file size is too large to post here. It’s a PITA to get them small enough to post. DM me an email or # and I’ll send them to you if they are helpful.
  15. Cad22000, Mar 15, 2026 at 11:28 PM
    #355
    Cad22000

    Cad22000 New Member

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    Thank you, yes that would be very helpful
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