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riva 45 superamerica

Discussion in 'General Yachting Discussion' started by dwarchitect, Jul 16, 2022.

  1. dwarchitect, Jul 16, 2022
    #1
    dwarchitect

    dwarchitect New Member

    Joined:
    Jul 16, 2022
    Messages:
    1
    Location:
    usa
    any experience with cummins 630 turbo - fuel economy, top speeds, general comments
  2. Capt Ralph, Jul 17, 2022
    #2
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,602
    Location:
    Satsuma, FL
    Welcome to Yacht Forums.

    The Cummins 8.3L, common rail, computerize, straight 6 cylinder, turbo and after-cooled engine was rated up to 650HP at one time.
    Dam good engine.
    I truly believe the engines installation makes a great difference on the owners satisfaction on these and most other engines.
    If you can not reach a service point, IMO it is a bad install and not a fault of the engine.
    If you are shopping for a yacht, please consider how you and/or a service tech can reach and service the power plants.
    The 8.3L Cummins is a dam good engine. Maintenance points are all over it.

    My point of view comes from the yacht management and service.
    Sadly, I have not owned this power in my own boats.

    Keep us up on what you are finding and looking for.
  3. Fiammetta42, Jul 17, 2022
    #3
    Fiammetta42

    Fiammetta42 Member

    Joined:
    Sep 28, 2017
    Messages:
    130
    Location:
    Liguria Italy ( boat )
    Agree with Capt Ralph , they all look and perform on test bed at the manufacturers and sure look good at static boat show stands .
    I would go as far as saying 1/2 the ensuring customer satisfaction is from the instal .
    This can be split into access to service, can you get around it = easily?
    furthermore the whole propping , displacement of the thing .Yes I know the manufacturers sign them off in hull #1 .But toss in cruising stores , seasonal growth on top of a bit of collusion by both manufacturers and boat builder to achieve a headline grabbing set of performance figures in said hull #1 tests , then in the real world a bad instal can trash a good solid engine before the first 1000 hrs are ever reached .

    So basically it’s over simplistic to call a base engine sat in its create good or dud.

    It all depends …….Turn it around its not a bad engine , they all aren’t. They don’t start out bad.