Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › 1990 3208TA w/ 2550 hrs: pre purchase questions

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  • April 2, 2018 at 7:22 am #30542

    Joe Casey
    Participant
    Vessel Name: Otter
    Engines: Yanmar 6LYA-STE
    Location: Annapolis, MD
    Country: United States

    Looking at buying a 42′ 23,000lb boat with twin 1990 3208TAs. Total hours 2550. WOT of 2650 and 2700 and oil pressure of 39 and 49 psi. Water temp 190 and 180 degrees. Modified V, planing hull.

    For this engine given the above, what should mechanic who does engine survey look for?

    Thanks,

    Otter 36

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Viewing 9 replies - 1 through 9 (of 9 total)
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  • April 12, 2018 at 8:52 am #30970

    Joe Casey
    Participant
    Vessel Name: Otter
    Engines: Yanmar 6LYA-STE
    Location: Annapolis, MD
    Country: United States

    Tony
    Thank you for the critical points.

    Joe

    April 11, 2018 at 8:28 pm #30962

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Joe,

    If you are really serious about what to “look for”, then here is simple list .

    1) Remove the “shower risers” from both turbos and lets see inside of the turbo exhaust outlet.. What you have is a wet riser system that is 100% “doomed to failure”, and IMO, is already probably leaking internally.

    2) Ask yourself why the fresh paint? Anytime I see that, I am skeptical.

    3) Ask for records as to when the salt water cooler aftercooler & Heat exchangers were removed from the engines and professionally serviced in a shop.

    4) Same thing for the gear cooler and seawater pumps..

    You asked, so this is what you need to “look for”………….

    Tony

    April 11, 2018 at 4:52 pm #30954

    Corey Schmidt
    Forum Moderator
    Vessel Name: Rebel Belle
    Engines: Cummins
    Location: Oxnard, CA
    Country: USA
    Luke Nelson wrote:

    Is that a interesting exhaust mixer come muffler idea on the 2nd last pic?

    That is a “shower can” mixer… most are prone to fail internally.

    April 11, 2018 at 4:47 pm #30953

    Luke Nelson
    Participant
    Vessel Name: Southern Image
    Engines: QSC 8.3 540hp
    Location: Perth
    Country: Western Australia

    Is that a interesting exhaust mixer come muffler idea on the 2nd last pic?

    April 11, 2018 at 1:31 pm #30939

    Corey Schmidt
    Forum Moderator
    Vessel Name: Rebel Belle
    Engines: Cummins
    Location: Oxnard, CA
    Country: USA
    Joe Casey wrote:

    Looking at buying a 42ā€² 23,000lb boat with twin 1990 3208TAs. Total hours 2550. WOT of 2650 and 2700 and oil pressure of 39 and 49 psi. Water temp 190 and 180 degrees. Modified V, planing hull.

    For this engine given the above, what should mechanic who does engine survey look for?

    Thanks,

    Otter 36

    First thing I will say off the top is that those are 2800 RPM engines and if you can only see the RPMs mentioned above at wide open throttle (WOT)… the engines are not reaching the governor like they should ~2900++ RPM. Something is NOT right… either too much prop for the boat or the engines have been beat up badly and are not able to reach full performance.

    April 11, 2018 at 12:24 pm #30935

    Joe Casey
    Participant
    Vessel Name: Otter
    Engines: Yanmar 6LYA-STE
    Location: Annapolis, MD
    Country: United States

    Yes.

    April 11, 2018 at 12:19 pm #30934

    Corey Schmidt
    Forum Moderator
    Vessel Name: Rebel Belle
    Engines: Cummins
    Location: Oxnard, CA
    Country: USA

    Joe, are those engine the 375 HP version rated at 2800 RPM?

    April 10, 2018 at 4:21 am #30859

    Joe Casey
    Participant
    Vessel Name: Otter
    Engines: Yanmar 6LYA-STE
    Location: Annapolis, MD
    Country: United States

    Pictures of the 3208TAs

    Not particularly good photos. Engines were repainted recently.

    Thanks for any advice you can provide as to what to look for.

    joe

    April 9, 2018 at 9:37 pm #30853

    Corey Schmidt
    Forum Moderator
    Vessel Name: Rebel Belle
    Engines: Cummins
    Location: Oxnard, CA
    Country: USA

    Joe, can you post any good pictures of the boat so we can peek around?

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