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Cummins 450 Diamond Series….?

Discussion in 'Engines' started by Norseman, Apr 15, 2024.

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  1. Norseman

    Norseman Senior Member

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    Yes, this one is a single, but they also come with twin Cummins 370s, hence there
    should be plenty of room to work on the single 450. (Perhaps wishful thinking)
    These boats are pretty rare, never been on one yet, asked the owner for more pictures, but they
    are on a family visit right now and promised to take more pics when they get home.
    Thx for the maintenance info.
  2. Pascal

    Pascal Senior Member

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    Well I didn’t chime in because there wasn’t much to add to the fact that these 6CTAs are excellent engines.

    Personally I would not go for a single engine though, as reliable as these nothing beats the peace of mind of twins.

    speaking of Sherwood pumps I had to replace an impeller on one of the Ohnos 45 on the office yesterday, powered by 4BTA It s one of the pumps where the cover is actually the body of the pump, not a plate. Easier to remove the impeller obviously but much harder to reinstall. Lousy design with a very thin O ring on the cover which doesn’t want to stay in place.

    Ended up removing the whole pump (just two bolts as it’s gear driven) and reinstalling the impeller on the bench.

    and of course the heat exchanger is on the back side close to the bulkhead. I only recovered 3 out 4 vanes… I know the HE inlet is clear as we had it cleared a few months ago so that last piece is staying there for now :(
  3. Norseman

    Norseman Senior Member

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    Yes, but..
    I had twins before, and had singles.: Yes, piece of mind if one are in remote areas or are crossing big oceans, true..
    Never had a single pack up on me, prefer to baby a single with lots of preventative maintenance and take my chances.
    I also have 2000 hours flying single engine airplanes, most of it in Bush Alaska, never lost
    an engine, feeling lucky.:cool:
  4. Capt Ralph

    Capt Ralph Senior Member

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    Rule #1 when Flying in Alaska; bring plenty of duct tape.
    th-1215285498.jpg
    Oh, the engine ran great,
  5. Norseman

    Norseman Senior Member

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    Only if you crash.

    Rule # 2: Don’t crash..:confused:
  6. Norseman

    Norseman Senior Member

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    How much is a new Cummins 450 Diamond Series?
    (If the old one should implode)

    My previous boat had a 6LP -STE which cost about $35k to replace, but only if you could prove to the EPA that the old motor was beyond savings and the block had to be destroyed:
    See this YouTube video of the destruction..:eek:
  7. Capt Ralph

    Capt Ralph Senior Member

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    Ah, a bear ate that one up,
    Rule #3; Don't feed the bears...
  8. Capt Ralph

    Capt Ralph Senior Member

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    I doubt the 8.3 would implode.

    But Ahh, The beauty of the Cummins re-man program.
    When rebuild time does come, IMO, it is cheaper and quicker with a better warranty, just to buy a Cummins re-built long block.
    Heck, Maybe a whole motor.
  9. Capt Ralph

    Capt Ralph Senior Member

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    BTW, later Cummins Smart Crap (no relation) dash displays are now Simrad displays with the Merc/Cummins software.
  10. Norseman

    Norseman Senior Member

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    Not on its own, but over the last 25 years numerous previous owners
    could have abused the hell out of it and poof….
    (Yes, I will get an engine survey, but not a 100% insurance, I am always considering
    The worst case scenario)

    Yeah, I have heard of bears chewing on fabric airplanes, but they
    usually have no appetite for aluminum products, unless of course there was a juicy and chubby
    pilot inside..:(
  11. Pascal

    Pascal Senior Member

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    FWIW, 6 years ago 435hp 6CTAs with new ZF gear were about $35k each, Cummins factory reman with 2 years warranty. I believe they re all new parts except the block and maybe the crank. Best value out there.

    probably $50k nowadays thanks to 3 years of crazy inflation
    f3504x4ps likes this.
  12. Norseman

    Norseman Senior Member

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    Roger that Mr. Pascal.
    This is why I like single engine boats, 1/2 price to replace the engine, 1/2 price to maintain and 3/4 fuel price.

    Safety and ease of handling are added bonuses of course and priceless..

    The only time I lost partial power on my single engine inboard diesel was going up the New River when we got a palm frond wrapped around the shaft and prop.
    Fortunately my Mate was in good spirits and dove down there to cut it off thereby saving the Old Man from a trip in the drink.
    The mate was a former Captain in Fort Lauderdale on a 120’ Broward after Maritime College in Ireland and a promising Merchant Marine career on freighters, before he switched to Yachts in Florida.
    After that he got his pilot licenses and ended up as my co-pilot on the cargo 747s some 16 years ago.
    During a pleasure cruise a few years on the New River we lost power and got heavy vibration.
    My loyal Mate dove in and removed the palm fronds to save the Old Man from getting wet.
    Thanks Paul. :cool:

    Attached Files:

    Last edited by a moderator: Apr 18, 2024
    cleanslate likes this.
  13. cleanslate

    cleanslate Senior Member

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    It this not the same vessel you had ? O/B vessel not working so well , eh ? Oh so small … Your Albin was a great boat. Hope all is well . Read your posts and others, quite messing around and go get it. Sounds like a fine engine.
  14. Norseman

    Norseman Senior Member

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    Aye Cleanslate: The outboard vessel is working great, but only for short local trips.
    The Albin 35TE mentioned above should be a great Coastal Cruiser, including extended trips to the Bahamas.
    So was my previous Albin the 28TE, great boat but life changed and I sold it for top $$.
    Now life is changing again and my midlife crisis # 37 is approaching and I saw this here bigger sister for sale and I thought what the hell, let’s do it again..
  15. cleanslate

    cleanslate Senior Member

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    Hmm , never noticed the Albin size difference, thought they were all 28’ . 35’ of same vessel would be awesome. Anyway, should I come down to help you push the pen to sign the check ? %#$ A , yeah . Get it. I’ll help you sea trail it . Run the snot out of it. All good ? Floats, buy it. Done. Last time we talked here we got in trouble… lol. Still got my old tub, on it now. Doing just fine. Vessel working great. Love old boats, like I have a Choice .
    Last edited: Apr 19, 2024
    chesapeake46 likes this.
  16. Norseman

    Norseman Senior Member

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    They came in 3 sizes, the 28, the 31 and the 35 with the 28TE being the most sold, they probably made about one thousand 28 since 1995 until bk around 2007.

    Nah, still a long shot, not in love yet, just gathering information, but I need another boat as much as I need a hole in the head, kind of enjoying a long and lazy retirement, got burned out working on my boats since 1985, always crawling around in the bilges and re-wiring previous owner’s mistakes, always fixing and improving. Done doing that, but enjoyed long cruises in The Bahamas and The Caribbean in years past, get the occasional itch to do it again.
    Also considering a used Tiara 3800 but should probably sit back and do nothing.:cool:
  17. Capt Ralph

    Capt Ralph Senior Member

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    This may be the safer and most sane plan.
    Justifying another boat to run to the islands in, is what we do, just not to smart.

    Idea;
    Just fly in and rent a local boat.
    30 years ago, I was doing this and staying at the Green Turtle and Spanish clubs in the Abacos.
    Now, This was relaxing.

    A few years later our boat became our home and then we started cruising in our home. Never packed a suitcase again.
    This was fun, cruising in your home with your pets (kats), but not as relaxing.
    More events have popped up here at home, Not sure what our plan will be this summer.
    May just fly in as before.

    I have always hated the people packers.
    StAug and Stuart airports used to have an air group that air/taxied in-out of the islands.
    Vintage Air ??
    Not sure if they are still around but that was fun flight.
  18. Norseman

    Norseman Senior Member

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    Yeah great idea.
    Have tried it a few times: Once we rented a cottage on Staniel Cay and flew there from Executive Airport near Fort Lauderdale in a Cessna Grand Caravan. The package included airfare, all the meals AND a boat, an 18 CC with a Yamaha 115.
    It was ok, kind of fun I guess, but for some reason it feels better on a boat, especially a sailboat.

    Also chartered a bareboat in St. Thomas once, it was okay too.
    Looking to charter a bareboat out of Nassau next time and sail to the Exumas for a week but need to round up a crew, wifey is done with sailing and the islands.
    Need a few good men..:cool:
  19. Capt Ralph

    Capt Ralph Senior Member

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    Seems you have a H O for snailing. Then what are you looking at an Albin or Tiaia for?

    I'm long done with sailing also.
    So Our wives and I will fly in, dance the week away, waiting on you to snail up and sign the tab.
  20. Norseman

    Norseman Senior Member

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    Ah, if I have to explain..

    Sailing and living on a sailboat was peaceful and relaxing compared to doing it on a stinkpot.
    That being said, I am less patient and more in a hurry than before: Had powerboats the last 10
    years:
    Bimini in 3.5 hours rather than 9 hours.

    Joined the dark side for sure, but miss my youth living on a sailboat in the Virgin Islands 35 - 40 years ago as well as cruising the Keys and the Bahamas on this boat for 14 years out of Fort Lauderdale:

    IMG_7500.jpeg

    Did I say midlife crisis # 37? :rolleyes: