Cummins Marine Diesel Repower Specialists › Forum community › Marine Transmissions

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    • Cummins Marine Forum Topics
    • Twin Disc – black rubber pieces in the engine room?

      This topic has 6 replies, has 6 voices, and was last updated bybrian.brandler 2 years ago

      October 30, 2017 at 5:24 pm ENGINES = MAKE / MODEL – CUMMINS 6CTA8.3-M3, 450 HP ā€“ Age 2/23/00 (17.5 years) TRANSMISSION ā€“ 506A 1.75:1 TWIN DISC #P8413 I am noticing small black 1/8″ size pieces of black soft plastic. It almost looks like off a belt. It is coming from the vents on my Twin Disc transmissions. A few pieces on the stb. engine (find 3 – 5 pieces) and port more ( find 5 – 10) after each run of the engines. I wash and clean the engine…

      Started by: David B

      6 Replies
      October 24, 2022 at 7:58 pm Who did the repair for you? I had one side done right after I bought the boat, but the starboard side was supposedly on back order. I since then moved my boat from San Diego to HB and looking for a good mechanic to complete this starboard side for me. Any suggestions?   thanks in advance

      Last Post by: brian.brandler posted: 2 years ago

    • Twin Disc EC-250 electronic with synchronizers and trolling valves

      This topic has 5 replies, has 3 voices, and was last updated byMichael McGuire 2 years ago

      October 17, 2022 at 9:21 pm I recently purchased a 2003 Mikelson 50 with Twin Disc EC-250ā€™s with electronic synchronizers and trolling valves. There are three stations and all controls are pitted and corroded. Finding identical units to replace them seems to not be viable. Is there a more current model that can replace this set up? Ā Thank you advance for any insight or input on this topic.

      Started by: Michael McGuire

      5 Replies
      October 22, 2022 at 9:02 am JP – do you own a Mikelson 50? Ā If so, email me at [email protected]. We should trade tips and info.

      Last Post by: Michael McGuire posted: 2 years ago

    • Salt water submersion

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      October 19, 2022 at 6:22 pm Hello Seaboard Marine, I have a 33 ft Barry Farrell troller wth a Cummins 6BT diesel and Borg Warner V Drive,. Sadly the boat sank in salt water and the engine was completely submerged. We hauled her out immediately and she is now on dry land. Is it true that the engine must be pickled immediately or at the very latest within a few hours. Can you please tell me if this is true or can It wait a few days until my mechanic can get to it?. And what …

      Started by: Christopher Russell Welsby

      1 Reply
      October 21, 2022 at 3:27 am There is only one good answer to your concerns. Pull the injectors and fill the cylinders with #2 diesel, Drain the v-drive and fill it with #2 Drain the oil pan as soon as possibleĀ  –Ā  As the #2 leaks past the rings into the oil pan add more #2 Have a catch contain under the engine Bar the engine overĀ  Ā  Speculating on how long you can wait is like answering thisĀ  “How long isĀ  a String”Ā  Ā  Any Contingency damage??Ā  Same answe…

      Last Post by: Tony Athens posted: 2 years ago

    • 6BT transmission oil coolant anode

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      October 19, 2022 at 8:15 pm Hi there, Quick question. In the attached photo of the oil heat exchanger where is the anode. The small plug in the lower left end seems very small. many thanks Nigel Nck

      Started by: Nigel Kittow

      1 Reply
      October 21, 2022 at 3:16 am On the Cummins factory supplied transmission oil cooler shown here (6BT 5.9), there is NO real provision for an anode.Ā  The small 1/8″ NPT port / plug was put there to drain the coolant/seawater , or maybe for a seawater feed to a shaft log?.. Maybe we should ask, what were they thinking?     Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • Zeus – adding a Second Joystick

      This topic has 2 replies, has 3 voices, and was last updated bySteve Lewis 2 years ago

      October 5, 2022 at 12:35 am My main helm joystick is great however I have no visibility of back corners of boat nor can I get my head out the slim window opening on our Riviera 4400 [Wife has already done those jokes] Any idea how difficult and cost involved in installing a second joystick in the cockpit?Ā  Ā Would be a 5m run and relatively easy to get cables through Have just been quote $18,000 AUD / USD$11,350 for a Dockmate Thanks Harvey Sassy

      Started by: Harvey Grantham

      2 Replies
      October 17, 2022 at 8:18 am What about a rear facing camera that is connected to one of your Multi Function Displays?Ā  If you do some searching and reading on this site about Zeus and the joystick, you might look at something a little lower tech and more reliable.Ā  Mount it on the center line of your hardtop looking aft and you can see what you need to see.Ā  You will still need to move yourself from the helm to the aft deck to handle lines but you are doing that now I bet.…

      Last Post by: Steve Lewis posted: 2 years ago

    • ZF BW165 Leaking…and slipping?

      This topic has 7 replies, has 2 voices, and was last updated byNicholas 2 years ago

      September 30, 2022 at 8:25 am I’ve got ZFBW165 mated to 1200 hp man’s.Ā  The port oil cooler has been leaking. I plan to remove it and hopefully its just a matter of replacing the o-rings where it mounts to the gear box.Ā  However, I now have a new problem that may or may not be indicative of the cooler failing all together.Ā  Recently, I had my port trim tab fail while underway (boat is a 58 viking). I’ve since had the trim tab removed and am running without …

      Started by: Nicholas

      7 Replies
      October 12, 2022 at 12:04 pm I was able to source a used OEM cooler. Appreciate the offer to help, may take you up on it when the other one inevitably goes bad šŸ˜‰

      Last Post by: Nicholas posted: 2 years ago

    • ZF 280-1 electronic shifted gearbox

      This topic has 2 replies, has 2 voices, and was last updated byJon Tisdale 2 years ago

      October 2, 2022 at 4:16 pm Hi guys, Cummins 480 CE coupled with a ZF 280-1 gearbox, Fully electronically shifted, microcommander controls and cruise command processors. This weekend moving the boat after no issues at all shifting around the fuel dock, we got under way and up to around 2050 rpm, and after about twenty seconds under power there was a noticeable bang, the shaft will not spin, and the controls will not shift into forward or reverse. I have never had an issue …

      Started by: Jon Tisdale

      2 Replies
      October 3, 2022 at 5:56 pm Hi Tony thanks for the quick response. Had the boat hauled todayā€¦ no response from the port side after the bang was due to the shaft shearing off behind the strut. Prop gone. Shaft was not spinning at idle speed without the prop obviously. Trans side seems ok, now to deal with the rest of the repairs needed. Thanks for getting back to me as quickly as you did.Ā 

      Last Post by: Jon Tisdale posted: 2 years ago

    • ZF Microcommander problem

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      September 25, 2022 at 2:20 am Hello good people. Does anyone did experiended same issue with microcommander,maybe what to check first? Have manuals,and warming up my chair to do some self learning,but manuals are not small..   Much obliged for fast reply.

      Started by: Matthew

      1 Reply
      September 30, 2022 at 4:48 am IMO, the only real answer is to learn the system yourself , or hire a tech that knows the system.. The ZF manuals are quite good.Ā  Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • ZF 280 Gear Pressure too high?

      This topic has 4 replies, has 4 voices, and was last updated byClark Leighs 2 years ago

      August 16, 2022 at 9:43 am 6cta 450’s, zf 280 transmissions.Ā Ā  Typical cruise is 2250rpm and I typically see gear pressure of 300psi Port and 225psi Stbd.Ā  Coming back in last weekend and I was cruising at 2400rpm just for the fun of it, probably for 30 minutes.Ā  At some point the port pressure climbed up above 400psi.Ā  I don’t know if it is due to the faster cruise or some other reason. No funny vibrations, sounds, always shifts smoothly and easily. Is this s…

      Started by: MATTHEW

      4 Replies
      August 19, 2022 at 3:57 pm OVer the years I have fixed goofy reading guages by reterminating them.Ā  Ā  Ā THe actual guage and sender were OK but the connections were not. I found many of my terminals had light corrosion on them and it showed on the wire. I would clip off the old terminal,Ā  strip the insulation back,Ā  use ROSIN paste to dip the wire end into,Ā  heat it with my solderingĀ  ironĀ  so the paste would clean the wire strandsĀ  and then reterminate with new terminalsĀ …

      Last Post by: Clark Leighs posted: 2 years ago

    • 1st ZF280A Gear Oil Change

      This topic has 2 replies, has 2 voices, and was last updated byBill Desmarais 2 years ago

      July 13, 2022 at 6:12 am This topic has been postedĀ  before and Rob Schepps has a short writeup on the topic.Ā  I figured I post my 1st hand account of the oil change. First….do not attempt trying to take off the 36mm hex nut magnet/screen plug on the gear without using a 6 pt socket that has had the bevel ground down flat. There is not much depth to the head of the 6 pt plug. IMOĀ  if you use a standard 6 pt (without gringing on flat)Ā  or a 12 pt socket you’l…

      Started by: Bill Desmarais

      2 Replies
      August 15, 2022 at 6:05 am yes I’ll send the picturesĀ  main ride is a 25 Terry Jason down east, 370 6BTA CPL 2008 ZF63A gear 1.54:1 ratio, 1.75" shaft, 20X19 DQX, 5 inch exhaust pending.....27 H&H down east, QSB 5.9 480 CPL 1860, ZF280A gear 1.76:1 ratio, 1.75" shaft, anticpate 21X21 DQX, 6 inch exhaust

      Last Post by: Bill Desmarais posted: 2 years ago

    • ZF IRM280A.2 no gears

      This topic has 12 replies, has 2 voices, and was last updated byMatthew 2 years ago

      July 25, 2022 at 7:38 am Hello there. Was today on this boat,it has two old Volvo TAMD74 engines with ZF gearboxes,and on stbd side no gears at all,someone did changed solenoids,did check lever controls,voltage to solenoids alos good when lever is in forwards or reverse,but nothing happenes. Is it possible to mechanically override solenoids to check if gearbox itself works,or similar?   Thank you.

      Started by: Matthew

      12 Replies
      August 14, 2022 at 2:40 am Yes,on my pump is also housing worned like on your photo,sorry for not taking better photos.. It has low pressure,too low that works as it should yes,that’s why if you can reply on email with estimate with super urgent shipping would be greatly appreciated. Later on i need to drain,clean,flush oil system,but this will be on when i know new pump is on the way,will have time to do it. One more question,probably will be chalenging to install …

      Last Post by: Matthew posted: 2 years ago

    • Transmission Lag in Detent

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      June 28, 2022 at 6:53 pm ZF 280 A, 50 hours since last change. Inspected magnet and screen on aft end all good. Port side has developed a 5-7 second lag in the detent position fwd and rev. Shifters are Volvo electronic. Also cruising above 9 knots there are 1-2 second skips no rpm change, these skips are random. The transmissions are mounted on Volvo TAMD 74P EDC 480ā€™s 2001 models. The last oil sample was fine but did show a trace of aluminum. Any help with diagnosis an…

      Started by: Ford Verdery

      1 Reply
      August 1, 2022 at 7:50 pm Sounds very much likeĀ  a Volvo Control system issue.. PostĀ  clear pics of the top /control valves on the gears Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • Twin disc gear ratio difference

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      July 25, 2022 at 2:39 am I have a 1979 43ā€™ Hatteras with a pair of QSM11ā€™s. The port transmission has a gear ratio of 2.44/1 and the starboard side is a 2.50/1. Ā <br /><br /> 1. is this a huge problem with strain on the port engine as Iā€™m seeing a higher fuel burn on that side?<br /><br /> 2. Ā Can the gear itself be changed to match the starboard side?

      Started by: Ryan Balsinger

      1 Reply
      July 27, 2022 at 6:28 pm SIMPLE ANSWER=Go Fishing.. Ā  If you want a “deeper” answer,Ā  Ā post clear in-focus pic of each data tag. Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • Rubber bits from the bell housing

      This topic has 5 replies, has 2 voices, and was last updated byTony Athens 2 years ago

      June 25, 2022 at 8:48 am This winter I installed a new transmission and drive plate and rear engine seal, all new parts that I got from you and were confirmed to be the right parts.Ā  I have now driven the boat about 13 hours and have found pieces of rubber and rubber dust under the engine right under the hole in the bottom of the bell housing. Any ideas as to what might be going wrong?

      Started by: Glenn MacDonald

      5 Replies
      July 18, 2022 at 6:30 am Possible factory “defects” ??Ā  The Vulkan 1000’s come direct to me from American Vulkan in Florida..Ā  We make about two buys per yearĀ  ( 30-50 each time) Take pics of the 1st unit, take it apart and document what you see.. Is the past. “Vulkan’s attitude” onĀ  anything like this is:Ā  Ā “we can do no wrong”Ā  Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • Replace Zf220A trans flange.

      This topic has 2 replies, has 2 voices, and was last updated bydonald roth 2 years ago

      July 13, 2022 at 8:31 am Is it possible to replace the transmission flange without removing the engine/transmission? Ā Mounted to 6BTA 370.Ā 

      Started by: pwrobert

      2 Replies
      July 13, 2022 at 3:26 pm Whatā€™s the problem with the flange? Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  Ā  You might want to also replace the seal at the same time.    

      Last Post by: donald roth posted: 2 years ago

    • Metal fragments in 280A valve body

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      July 2, 2022 at 10:38 am After removing the solenoid and pulling the shaft out of the body the screen on the end had several pieces of small metal fragments and there were also some in the body itself. Ā Any ideas about what could be happening . Thanks for any help.

      Started by: Ford Verdery

      1 Reply
      July 2, 2022 at 1:11 pm Zero history of the problem or symptom.Ā  Zero pictures..   No crystal balls on this forum Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • New ZF 220a Pressure Questions

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 2 years ago

      June 27, 2022 at 6:13 pm Yard just installed a new ZF220a gear on a 6bta 330 cummins.Ā  Last one had an issue keeping pressure.Ā  The new gear is set up with a new trolling valve installed and the pressure sender is on the outboard side of the trolling valve with a right angle turn on the pressure sender.Ā  (sorry, can’t get pictures until Wed.)Ā  In reverse, I get zero pressure on the gauge.Ā  Also, in gear, I am only getting 300 psi.Ā  I get just under 300 psi in idle…

      Started by: Scott A

      1 Reply
      June 30, 2022 at 7:07 am Gauge is in the wrong place–Put it on one of the transmission cooler connections   https://www.sbmar.com/articles/gear-transmission-pressure-sender-location/ Ā  Ā  Seaboard Founder & President

      Last Post by: Tony Athens posted: 2 years ago

    • ZF280 leaked some oil at cooler

      This topic has 1 reply, has 1 voices, and was last updated byOscar 2 years ago

      June 27, 2022 at 1:31 pm Cruising today zf280 fell out of gear(electric shift) I stop and would not go into fwd. Oil was leaking from cooler at joint with cooler cap. Checked oil, was not contaminated, but over filled, recent oil change, I took out 16oz/500ml, which brought oil to 3/4 to full. I run another hour and no leak or issues, gage says 350-370psi in drive. I will take apart cooler later, I’m in Bahamas this weekĀ  So….does over filled oil cause ̶…

      Started by: Oscar

      1 Reply
      June 29, 2022 at 6:54 am Joint where oil was leaking 3800 Pursuit TAMD75 480hp Tony needs to pick up Volvo!

      Last Post by: Oscar posted: 2 years ago

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