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    • Cummins Marine Forum Topics
    • Jersey Sportfish Repower

      This topic has 8 replies, has 5 voices, and was last updated byleonaj99 6 years ago

      October 9, 2017 at 6:38 pm The boat is a 42′ 1993 Jersey Dawn III sport fish. The engines are 6-71 TIB’s, 485HP, that have about 1000 hours on them since full rebuilds. They run fine, but they are noisy, dirty, and smelly. It’s a great boat, and my wife and I both love the interior layout and it’s livability. We are now retired and are contemplating the options of running this boat back and forth from RI to FL vs staging it down there and buying …

      Started by: RicM in: Boats & Repowers


      8 Replies
      October 22, 2017 at 8:16 am Rick good luck in your repower and in making the tough decisions. I just want to emphasize Tony’s comments regarding sub system upgrades/improvements. Having done a single engine repower myself in the past and having done most of it myself I found an awful lot to do as soon as the old engine was out. Old thru hulls? Now I have good access so time to install new ones. Old water system plumbing? Gone and a new system installed with proper a…

      Last Post by: leonaj99 posted: 6 years ago

    • SMX Impeller replacement interval

      This topic has 6 replies, has 4 voices, and was last updated byBill Desmarais 6 years ago

      September 25, 2017 at 4:51 pm After how many hours should an SMX impeller be replaced? Mine has two summers, almost 1,600 hours on it.

      Started by: Richard G Cook in: Cummins Marine Engines


      6 Replies
      September 27, 2017 at 1:35 pm And if ya want to avoid a “dry start” after a long winter…….just before launching……….remove the two 1/4″ plugs on the face of the pump. (vacuum and pressure ports) One on each side and about where the top of the impeller would be. Spray heavy inside the holes with WD-40…………”bump” the engine with the key or push button….just BUMP……spray againR…

      Last Post by: Bill Desmarais posted: 6 years ago

    • ZF63A gear fluid change, stay with ATF or switch to 15-40 oil ?

      This topic has 4 replies, has 5 voices, and was last updated byTony Athens 6 years ago

      August 15, 2017 at 7:09 am Hello All, I’m about to do a fluid/filter change on the ZF63A gear coupled to the 6BTA 370 in my lobster boat. There’s been lots of discussion on other forums on whether to run ATF in the 63A gear as listed by ZF……..or…..switch to 15-40 oil that is also approved by ZF in the 63A gear. The change from ATF to 15w-40w oil supposedly “quiets” the gear rattle and shift banging. Anyone have any thoughts or opi…

      Started by: Bill Desmarais in: Marine Transmissions


      4 Replies
      August 19, 2017 at 6:29 pm Just within the last 6 months, “100% hands-on” direct experience with a ZF85IV that runs on the edge as to “duty cycle” and power input in commercial service (1500+ hrs per year) has shown superior shifting qualities and measurably lower oil temps (a solid 20 F drop) …………… We just installed his 3rd gear at 6000 hours and we hope to get an extra 1500+ out of this one running 15W-40R…

      Last Post by: Tony Athens posted: 6 years ago

Viewing 3 topics - 1 through 3 (of 3 total)