This forum contains 59 topics and 287 replies, and was last updated by  Tony Athens 1 week ago.

Viewing 20 topics - 1 through 20 (of 59 total)
    • Cummins Marine Forum Topics
    • twin disc 5061a 1.5 to 1

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 1 week ago

      October 2, 2018 at 7:34 am Is a twin disc 5061a 1.5 to 1 strong enough for a cummins 6c diamond 450 with 430 hp thanks me

      Started by:  nicholas hill


      1 Reply
      October 3, 2018 at 6:44 am Solid gear and is well suited for the 450 Diamond. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 1 week ago

    • Checking the fluid level in a ZF63A Gear

      This topic has 2 replies, has 2 voices, and was last updated by Bill Desmarais 1 week ago

      September 29, 2018 at 7:47 am Good morning, There’s been lots of discussion on this forum and others about “the best practices” on checking fluid levels in marine transmissions. I have a ZF63A bolted onto the rear end of my 6BTA 370. I changed the fluid and the filter in the gear this past week. There is 257 hrs on both the gear and the 370. I’ve been using ATF in the gear (as specified in ZF63A spec sheet) since new. This recent fluid/filter chang…

      Started by:  Bill Desmarais


      2 Replies
      October 2, 2018 at 6:17 am Will do…this week ! 25 Terry Jason down east, 370 6BTA CPL 2008 ZF63A gear, 1.75" shaft, 20X19 DQX

      Last Post by:  Bill Desmarais posted: 1 week ago

    • zf 220A Over dipstick level when filled with recommended amount

      This topic has 9 replies, has 4 voices, and was last updated by Rob Schepis 2 weeks ago

      September 23, 2018 at 3:22 am Hi all, thanks for your help in advance – I appreciate it. I have changed the transmission oil in the new boat – ZF MPM IRM 220A serial number 91.7969C. My paperwork calls for 4 litres (4.2 US quart) of fluid, but by 3 litres I’m way past my high mark on the dipstick. Now I have it all in and have run the engine in gear for a couple of minutes the level is reading 6cm (2 3/8 inch) below the level of the top of the dipstick hol…

      Started by:  Dan Kealy


      9 Replies
      September 30, 2018 at 4:07 am Affirmative on the 22MM drain plug Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 2 weeks ago

    • ZF301A loud whine then no forward or reverse

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 2 weeks ago

      September 24, 2018 at 12:32 pm Running the boat at 2160 RPM’s and port gear started making a whining noise and if the RPM’s changed so did the intensity of the whine. the whine stopped all of a sudden and so did any movement of the port shaft. Oil in gear box is good and is not burnt, no metal or debris in filter. Had a burnt rubber smell in engine room for about 2-3 minutes then it went away – heard no other noise other than the whine, and now there is no o…

      Started by:  Mike


      1 Reply
      September 24, 2018 at 6:18 pm Look at the pics.. You have Bonded Rubber torsional coupling that has failed completely, and the other is 1/2 thru the complete failure (a few more minutes at medium power should do it) .. That’s what these coupling do..Whine, slip, burn rubber, and finally let go completely.. Welcome to the world of “modern Monkey Motion” torsional couplings You need to pull the gears to “see” what you have.. More that one type f…

      Last Post by:  Tony Athens posted: 2 weeks ago

    • qsc 8.3 w/ ZF intermittent reverse

      This topic has 9 replies, has 4 voices, and was last updated by Robert Greig 1 month ago

      February 22, 2017 at 6:22 pm I would appreciate any help with this problem. I have smart craft electronic controls.  reverse does not initially always engage on port engine when control is put in reverse . If I shift from reverse back to Neutral a couple of times it works. Tried switching solenoids, no difference. If I turn manual override screw under solenoid cover always works. Any tips would be helpful.

      Started by:  David


      9 Replies
      September 9, 2018 at 7:02 pm Thanks Tony. I do plan to take it apart to get to a final resolution. Giving it a whack was the short term fix when offshore or backing down a fairway to dock. I’ll get a better picture of the configuration on the transmission. Rob

      Last Post by:  Robert Greig posted: 1 month ago

    • Twin Disc MG5075

      This topic has 9 replies, has 2 voices, and was last updated by Lawrence Ross 1 month ago

      August 30, 2018 at 4:07 pm Need Help with what type of Torsional coupler to use with twin disc mg 5072 with a Cummings 480 ce in a motor yacht Mine is going bad and i am trying to decide what to replace it with a centa or a vulkan type I have 5,000 hours on the original 2005 unit now i do not know what is in there have not opened it up from the information i have gotten is looks like it maybe a centa cx109a?? Thanks all Larry Larry

      Started by:  Lawrence Ross


      9 Replies
      September 8, 2018 at 4:24 am Thanks Tony will do no damage just bad rubber blocks on the non pressure side wounder what they did? the pressure side rubber is very hard will call Centra on Monday Larry

      Last Post by:  Lawrence Ross posted: 1 month ago

    • Help id transmission (hopefully)

      This topic has 5 replies, has 3 voices, and was last updated by Shawn 1 month ago

      August 20, 2018 at 8:49 am Trying to get better pictures but for now this is what I have. Attachments:You must be logged in to access attached files.

      Started by:  Shawn


      5 Replies
      September 4, 2018 at 6:15 pm I have it and am able to run it now, but prop seems too big maybe. I had a 2:1 before, was kind of hoping it was a 1.75:1 and I’d be ok.

      Last Post by:  Shawn posted: 1 month ago

    • ZF280A- topping up Transmission Oil.

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 1 month ago

      September 2, 2018 at 9:33 pm Change to a New ZF-280A since 6 years ago. Only recently 2 years ago start topping up Transmission gear oil and frequency seem to get shorter with every Fuel top up. Need to top up Transmission oil too. What does it tell us ? lawrento

      Started by:  Lau Fook Gah


      1 Reply
      September 3, 2018 at 12:15 pm ENGINE HOURS vs. adding 8 -16 ounces of oil?? Please, Real numbers–One vs the other. Post a good picture of the bilge area under the engine & gear Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/ Attachments:You must be logged in to access attached files.

      Last Post by:  Tony Athens posted: 1 month ago

    • Low pressure in ZF 63A

      This topic has 6 replies, has 3 voices, and was last updated by Nigel Kittow 1 month ago

      August 18, 2018 at 5:02 pm Hi all, I would really appreciate some advice on a new problem. I have a Caribbean (Bertram) 32 with twin 6BT and ZF 63A transmissions. Several months ago I had a shaft seal replaced on the port gearbox, replacing the fluid with Shell Spirax ATF. The boat hasn’t been used since then until yesterday. The transmission pressure was low and flickering but it would go in to both forward and reverse ok though I suspect at times I had some slippage..…

      Started by:  Nigel Kittow


      6 Replies
      August 26, 2018 at 4:44 am I see you have a VDO transmission sender listed as 28 bar/400psi. Would this be a suitable replacement for a 25 bar 360 psi VDO sender in the ZF 63a of mine? Thanks Nck

      Last Post by:  Nigel Kittow posted: 1 month ago

    • Dexron IIIH

      This topic has 2 replies, has 2 voices, and was last updated by Thomas Hale 2 months ago

      August 5, 2018 at 8:25 am Is Dexron IIIH functionally equivalent with Dexron III? Is it OK in a ZF 63A gear box? 411 Walnut St #7130

      Started by:  Thomas Hale


      2 Replies
      August 6, 2018 at 5:36 am Thank you for your prompt reply. 411 Walnut St #7130

      Last Post by:  Thomas Hale posted: 2 months ago

    • ZF Hurth Model HSW 800 A2 – 2.0 Help me learn.

      This topic has 4 replies, has 2 voices, and was last updated by Tony Athens 2 months ago

      July 26, 2018 at 3:12 pm Finally found the tag on one of my transmissions (gear boxes). A Google search didn’t turn up more than a simple chart showing gear ratio, power and torque specs. I’d like to get a better feel for the maintenance routine for them. A operator/maintenance/repair manual would be nice. Looks like this is an older model that has been replaced by the ZF 80A Thanks in advance. Paul Changes in L'Attitudes 1999 Maxum 4100 SCA Twin Cummins …

      Started by:  Paul Hoffman


      4 Replies
      August 5, 2018 at 5:16 pm Fluid=Dextron spec ATF AMOUNT= Middle of High Low Marks on dip stick– maybe 5 quarts on a oil change.. DO NOT OVER FILL. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 2 months ago

    • zf 80 lv temp specs

      This topic has 11 replies, has 4 voices, and was last updated by Europeanautoctr 2 months ago

      May 30, 2018 at 8:12 pm I have been chasing down a possible transmission temp problem. does anyone know what the temp specs are??? After running 1/2 hour port side runs 130 degrees f the starboard runs 165 degrees f. some thoughts are sice one side is counter rotation it will run hotter??? I have owned the boat since new 2005, Searay 390 dancer with cummins 370 qsb diesels. I have never noticed this. Presures at 2400 rpm are the same side to side 365 psi. When at 850 …

      Started by:  Europeanautoctr


      11 Replies
      August 4, 2018 at 10:59 am I removed the exhaust elbow from the turbo, the outlet(shower head design) was partly clogged with rust scale. I had a new end for the elbow with larger holes made, now after 1 hr of run time at 2400 RPM it still climbs to 195 & rising. Afraid to let it run hotter. The engine temp has dropped from 185 to 175. So all the hoses, diesel fuel cooler, after cooler, trans cooler, engine heat exchanger & water outlet from the exhaust elbow have…

      Last Post by:  Europeanautoctr posted: 2 months ago

    • Twin Disc MG507 No reverse?

      This topic has 2 replies, has 2 voices, and was last updated by Chris Braud 3 months ago

      June 18, 2018 at 1:37 pm I have noticed lately that my starboard clutch is slow to engage reverse and feels as though it´s slipping or not engaging completely. I´ve tried disconnecting the cables and shifting the selector manually at the clutch and get the same result. I´ve also checked and the filter screen which was clean and changed the oil (40wt) and that did not make any difference either. Pulled the selector and replace the o-ring, reinstalled and double checke…

      Started by:  Chris Braud


      2 Replies
      July 10, 2018 at 9:14 am Tony, I’m having trouble locating a replacement filter screen for the MG507. When servicing I accidentally stepped on it and it crushed. I straightened it out as best i can but I would like to replace it with a new one. I would also like to replace the cover with the o-ring as the previous owner stripped out the threads used to insert the bolt to remove it. Will the screen for the MG5075 work for the MG507? That’s the only one I…

      Last Post by:  Chris Braud posted: 3 months ago

    • Hurth Shift valve testing

      This topic has 2 replies, has 2 voices, and was last updated by Hy Pryluck 3 months ago

      July 8, 2018 at 3:21 pm A few days ago, I was coming into the marina’s channel to get to my slip. All was fine till I wanted to turn to starboard. I put the port transmission into reverse from forward and nothing happened. Neutral. I put it back into forward and it stayed in neutral. After some piling bumping and help from the dock crew, I got into the slip. Removed shift cable from transmission and shifted manually; stayed in neutral. Transmission fluid is clean…

      Started by:  Hy Pryluck


      2 Replies
      July 9, 2018 at 8:07 am Thanks, Steve. I’ll relay the info to the mechanic and do some testing myself, following your directions. Hy professor1255

      Last Post by:  Hy Pryluck posted: 3 months ago

    • ZF 325 Low Pressure – Slow response

      This topic has 2 replies, has 3 voices, and was last updated by Philip 4 months ago

      June 12, 2018 at 4:24 am ZF 325-1 gears. 2006 boat, new to me. Electronic controls and trolling valves. Problem on the starboard gear. Transmission pressure normal at start up, 343 PSI each gear. Putting the starboard in gear response is slow. 2-3 seconds or so from putting in gear to gear activating. Pressure drops to below 20 PSI and wont come all the way back up. No oil in bilge. No oil going out the pipe. Recently had an issue on same gear cooler leaking at fitt…

      Started by:  steve mcgonagle


      2 Replies
      June 13, 2018 at 2:28 pm I think there are two springs in there… see attached pictures. I think one is a relief spring and the other a modulation spring for the trolling valve? Attachments:You must be logged in to access attached files.

      Last Post by:  Philip posted: 4 months ago

    • ID Label – ZF Marine gear box

      This topic has 3 replies, has 3 voices, and was last updated by glenn111 4 months ago

      May 28, 2018 at 9:35 am Continuing to learn the boat … PO paperwork stack has a ZF Marine HSW/HSWE manual (models ranging from 250A through 800 V2). Quick look at the box didn’t show any markings, but I didn’t really bend all over the place. Any thought on where an ID label might be? Thanks in advance. Paul Changes in L'Attitudes 1999 Maxum 4100 SCA Twin Cummins 330HP 6BTA 5.9-M-3 Attachments:You must be logged in to access attached files.

      Started by:  Paul Hoffman


      3 Replies
      May 29, 2018 at 6:59 am Every ’99 SCA and SCB that I know of have Model HSW 800-A2. I believe it is a 1.96:1 ratio. Rob’s pic shows the location of the tag. Good luck.

      Last Post by:  glenn111 posted: 4 months ago

    • ZF Model 80lv low pressure

      This topic has 4 replies, has 2 voices, and was last updated by Europeanautoctr 4 months ago

      May 25, 2018 at 6:34 am I have a 2005 Searay 39 sundancer with ZF 80LV transmissions with cummins 370 qsb engines. On cold start up both temps 60 degrees, pressures both 350 – 375, I have a 15 minute ride out of channel pressure same temp 90 degrees. on first sea trial noticed starboard transmission temp raising to 160 degrees after crusing for 20 minutes & port side 110 degrees. Engine temp on both engines 177 degrees. When at clutch speed pressure drops t…

      Started by:  Europeanautoctr


      4 Replies
      May 27, 2018 at 5:17 pm PS no dragging on the sahft

      Last Post by:  Europeanautoctr posted: 4 months ago

    • ZF 325 1A Valve Block Leak

      This topic has 2 replies, has 2 voices, and was last updated by Steve Fontana 4 months ago

      May 23, 2018 at 6:11 pm Hello all. I just joined this forum but have been familiar with Seaboard with ordering parts for my QSM 11’s for a while. I have a small leak which appears to be at the front plate of the Valve Block. Thanks in advance for any advise or tips on getting this fixed. Is there an “O” ring kit?

      Started by:  Steve Fontana


      2 Replies
      May 23, 2018 at 7:33 pm Hi Tony, Thanks for the quick response. Unfortunately, I’m now in NY and the boat is in Florida and I wont get back to her until June or July. Attached is a similiar photo from another post where I pointed to where I believe the leak is coming from. I put a piece of an oil pad and slipped it under the end cap and it became oily after running. I guess it’s possible the leak is from under the valve block? Attachments:You must be logged…

      Last Post by:  Steve Fontana posted: 4 months ago

    • ZF Marine IRM280PL gear rattle / chatter

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 5 months ago

      April 17, 2018 at 12:34 pm I have a ZE Marine model IRM280PL transmission coupled to a Cummins 6BTA5.9M3 330 hp engine in my 1999 Nordic Tug 37 with currently just over 3000 hours on them. Ever since I purchased the boat at 2010 hours, I heard the gear rattle/chatter when at idle speed and the transmission in gear (only at that time). A slight increase in engine speed would eliminate the rattle/chatter (similar result to what was posted on your website). Last year I ch…

      Started by:  Mark Kiehl


      1 Reply
      April 20, 2018 at 6:15 am If you are getting gear rattle or clatter above an idle, and especially above 1000 RPM, your torsional coupling is most likely ready to fail, or has completely lost its “damping qualities”, or both.. Yes, I would be concerned.. Only solution, slide back the gear or lift it out and replace it.. There are not less that 3- styles for this engine / gear arrangement, and long term fied experience has shown some are better than others.. I…

      Last Post by:  Tony Athens posted: 5 months ago

    • Closest current model match to ZF Marine model IRM280PL

      This topic has 3 replies, has 4 voices, and was last updated by Tony Athens 6 months ago

      April 17, 2018 at 12:48 pm What is the closest ZF Transmission model to a 1999 ZF Marine model IRM280PL transmission? I am interested in what posted tips and suggestions would be applicable. In particular, the comments about measuring the transmission oil level. My transmission OM states to measure the transmission oil level when the engine is running and in neutral and idle speed. Once the dipstick is removed, oil spurts out aggressively from the opening. I think th…

      Started by:  Mark Kiehl


      3 Replies
      April 18, 2018 at 5:46 am Luke, ZF changed their Gear ID nomenclature about 10 years ago.. Your Model numbed is now called a ZF 280-1. There are also some physical internal & external changes, but if something did happened to yours, the change out is easy.. As to oil–A quality SAE HD 30 W meets the spec. Some 15W-40 also meet the spec. Oil level & checking–The manual is quite confusing on and if you ask an employee at ZF, you will not get a solid an…

      Last Post by:  Tony Athens posted: 6 months ago

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