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32xx Hino/Hurth Performance-gctid393591

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  • 32xx Hino/Hurth Performance-gctid393591

    Hello well I was looking for some information and to share some info.

    135 Hp hinos with 630a hurth that I installed a few years back.

    As several members know after I replaced my 360A Hurth Gear boxes to Hurth 630A hydraulic transmission my performance levels have dropped as it takes 15 hp to run then and in later Motor Yacht you see the 15hp upgrades in the 150hp engines.

    To get to my 3000 rpm levels I re pitched the Nakashima props. I had them repitch an was able to reach 2800 Rpm max

    The prop shop informed me that they could not re pitch the Nakashima's any lower so I switch to a new prop.

    I am running a Michigan Wheel 4 blade DQX skewered blade 17 dia 14.1 pitch on the port motor and 13.8 pitch on the starboard. I can reach 3000 Rpm with this configuration.

    With my RIB on the platform with 15 hp outboard motor and gear I am still a little short on rpms. Now I turn

    about 2950 rpm max fully loaded so I know I am still a little under propped probably about 3/10 or . 3 I think this fall when i pull I will repitch. To 13.8 port & 13.5 starboard. I know I am pretty close.

    This year I install 1/2 plastic spacers on the trim taps this has made a positive improvement. I am cruising at 2600 Rpm @14knts@ 1050 EGT. My exhaust gas sensors are pre turbo. I think if I drop the pitch this will also help my EGT. My dream is 950 degrees. I have up graded all my coolant lines on my turbo to 5/8 Id when I switched to silicone hoses.

    I think I might also interested in a aftermarket after cooler if you can recommend where to start on this.

    Thanks for your time. I am very interested as to what you folks think.

    Sincerely Roger

    Fair Winds and Following Seas
    1987 3270MY, 135 Hino engines

    2015 Element ( Lime Green) Limited Edition 75 HP Mercury.

    Roger, Lake Saint Clair, Michigan
    Fair Winds & Following Seas

  • #2
    I have a hybrid setup with a 630a on the port and a 360a on the starboard. I can get 2900 RPM on the 630a and 3100 rpm on the 360a. Running same pitch both sides, 4 blade props not sure size or pitch. I get 14 knots at 2450 rpm and a good 15 to 16 knots @2600rpm. WOT I can get 19 knots and sometime 20 on flat seas. I run 99% of the time right @2400rpm at 13-14 knots mostly 13.5. I do have a cooler that comes off the turbo exit. I consider it an "After Cooler". It probably fetches an additional 7-8 HP or more??? See pic.

    Attached files [img]/media/kunena/attachments/vb/697233=28997-Hino.jpg[/img]
    1997 3788/Cummins 6BTA 5.9 M2s (Sold)
    2003 Silverton 42c/Cummins 480CEs (Sold)
    2019 Cobia 240 CC
    2006 Boston Whaler 13 Sport
    1985 3270/Hino 135s (Sold)
    1983 Ocean Alexander 40/Ford Lehman 120s

    Vero Beach, Fl.


    • #3
      I have the same aftercoolers. Not sure who made them though.
      1998 Bayliner 4788
      1989 Bayliner 3270 - SOLD-


      • #4
        under huals will help a lot i think
        1988 3270
        135 hinos
        Seldovia ALASKA
        Marine canvas/Upholstery
        since 1975