This forum contains 36 topics and 189 replies, and was last updated by  Tony Athens 13 hours ago.

Viewing 20 topics - 1 through 20 (of 36 total)
    • Cummins Marine Forum Topics
    • ZF 220a Drain Plug Thread Size

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 13 hours ago

      November 22, 2017 at 4:31 pm Hello, Does anyone know what the thread size is for the oil drain plug on a ZF 220a gear box? Thanks, Pat

      Started by:  Patrick Presti


      1 Replies
      Reply #1 November 22, 2017 at 6:22 pm Not the answer you want———-A proprietary ZF Thread…….. If this is because you want to install as oil drain line, then drill and tap the plug for a 1/4″ NPT thread and go from there.. 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: 13 hours ago

    • Opinions on gear/engine match

      This topic has 3 replies, has 2 voices, and was last updated by Tony Athens 2 weeks ago

      November 5, 2017 at 5:14 pm Just bought a workboat with an older JWAC 6BTA, 250. It has a velvet drive 72C gear, can I expect issues down the road and what would a Heavy Duty replacement gear option be. Presently have a drive saver in line, so there is an 1.5″ or so extra length available if needed. David

      Started by:  David Wesner


      3 Replies
      Reply #3 November 6, 2017 at 7:48 am Your question is way to open ended……..Basically not much replaces VD other than another VD, unless you want to reconfigure things.. They are still available as new.. 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 weeks ago

    • Twin Disc – black rubber pieces in the engine room?

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

      October 30, 2017 at 5:24 pm ENGINES = MAKE / MODEL – CUMMINS 6CTA8.3-M3, 450 HP – Age 2/23/00 (17.5 years) TRANSMISSION – 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 en…

      Started by:  David


      3 Replies
      Reply #3 October 31, 2017 at 5:02 am You have a MG5061A, not a MG506A.. Most likely your torsional coupling is like the one in the picture.. This particular design does this all to often……… Once it starts “falling apart”, things progress quite rapidly……Only solution is to replace it of have it rebuilt (Centa has a “program”for this–under $300.. They will not sell you any of the parts… Depending on access, usually a…

      Last Post by:  Tony Athens posted: 3 weeks ago

    • Rebuild or Conversion

      This topic has 7 replies, has 2 voices, and was last updated by Tony Athens 1 month ago

      April 16, 2017 at 5:44 pm I have a failed MG-5075SC behind a 6BTA.  Considering a rebuild of the existing unit, however am also considering a conversion to a comparable ZF.   Any insights or recommendations?   Unit drives a Doen 105 jet and is 1:1 ratio.  One item that is driving the conversion question is the apparent damage to the Twin Disc – lots of metal in the oil and strainer following a low oil condition due to seal failure – may or may not be rebu…

      Started by:  David Erik Sneed


      7 Replies
      Reply #7 October 21, 2017 at 4:40 pm You don’t screw around.. You needed to get it done and you did.. Good for you.. Not that it matters now, but for the 5075 to fail at such early hours and then looking at the pics says volumes–The gear was installed with some type of interference on the input applying thrust pressure on the gears input shaft–Not a fault of the gear–A Lousy mechanic put it together.. Anyway, seems all is good now.. Tony Tony Athens Seabo…

      Last Post by:  Tony Athens posted: 1 month ago

    • TD 5065 Trans

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

      April 25, 2017 at 6:48 pm Hi everyone. Every year I’m having to change these damper plates. I’ve come to the conclusion that these gears are too light for my application on a QSB 5.9 with max RPM 2650 on my boat. Are there a heavier duty plates available or should i have to upgrade to a heavier duyy trans like the 5075? Attached is a pic of my recent change of plate. 1.72:1 reduction How do the ZF boxes compare to the TD? Attachments:You must be logged in to …

      Started by:  Anthoni Lightbourne


      9 Replies
      Reply #9 October 13, 2017 at 6:50 am Hello Tony. Thanks very much. Secured funding with management. Where can I purchase the CF-R 178 series coupling for my Cummins QSB 5.9? We are ready to purchase and install and I would like to call you and have a chat. Thanks Anthoni

      Last Post by:  Anthoni Lightbourne posted: 1 month ago

    • Transmission chatter at idle

      This topic has 1 reply, has 2 voices, and was last updated by Rob Schepis 1 month ago

      October 10, 2017 at 2:47 pm I have boat with two Iveco AiIfo Turbo Diesel engines 8061SRM30.10 and ZF IRM220A transmissions. Starboard engine and transmission run smooth, coupling between engine and transmission is Vulkan Torfles KT3. Poert size features Vulkan coupling that is actually just rubber disc between two mating parts. This engine and transmission chatters at idle. I asked every one, ZF, Iveco, marine places and no one knew why chatter occurs. I increased idle, c…

      Started by:  zlatko salihbegoivc


      1 Replies
      Reply #1 October 12, 2017 at 5:46 pm Cool looking boat. Custom? Aluminum? Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 1 month ago

    • Twin Disk 5050SC temp and pressure senders

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

      October 6, 2017 at 8:39 am My boat has a Twin Disk transmission 5050SC connected to a Cummins 6BTA 5.9 370HP engine. The instruments harness has wires for a transmission pressure and temperature senders but the senders were never installed. Does anyone know what temperature and pressure sensors should be installed and where they are connected to the transmission? The information will be connected to a NEMA2000 analog to digital converter for display on a multifunction dis…

      Started by:  Walter Schwab


      1 Replies
      Reply #1 October 6, 2017 at 5:11 pm Walter, You will not like the answer I am going to offer you.. I have nothing in my data base to refer to on that Twin Disc Model.. As to Twin Disc support–What you have found out is why I try and stay away.. Very poor support overall… I wish I had a better answer.. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Just took a chance with GOOGLE.. I found this bulletin…. This is a Gear that will have full Gear pressure on the oil line going to &a…

      Last Post by:  Tony Athens posted: 1 month ago

    • oil change for zf-85-iv 2.0

      This topic has 12 replies, has 4 voices, and was last updated by Bill Fuller 1 month ago

      September 29, 2017 at 12:34 pm have dual 2007 zf-85-iv-2.0 ( with dual qsb 5.9 425) just got the baot this year in jan so im preparing for winter layup and want to change oil on the zf … can someone tell me the type of oil and how much i need to get i have a reverso system so i figure pull out old with reverso and put in right in tranny …. sound good? thanks guys

      Started by:  raymond gonzalez


      12 Replies
      Reply #12 October 6, 2017 at 8:04 am One other thing. I think that fresh ATF helps keep the seals in good condition. Another reason too change once a year. Bill F.

      Last Post by:  Bill Fuller posted: 1 month ago

    • ZF 280A Trolling Valve adjustment? 1 2

      This topic has 22 replies, has 3 voices, and was last updated by Shawn Keulen 2 months ago

      August 16, 2017 at 6:47 pm Have a ZF 280A with trolling valve that is operated by the standard t handle push pull cable. I do salmon trolling on Lake Michigan with the boat which is a 36 Tiara with C series Cummins. I can dead stop the boat with the control and get to about 1.8 knots easy with it, but no matter how easy or patient I am with the cable/control I can´t get much more speed out of it without it making a gear grinding noise or jumping out of troll mode. I gues…

      Started by:  Shawn Keulen


      22 Replies
      Reply #22 September 2, 2017 at 8:51 pm Sorry I did not know that and did not think of taking pictures. It was the trolling valve spring located behind the piston the is driven by the cam on the control arm. It had a crack about 1/8″ from the end on the piston side opposite of the valve. I measured the spring as a whole then stretched to match the length trolled on it for 12 hours today and night and day difference. Tony is it possible to purchase a spring from you? 36 Tiara Cum…

      Last Post by:  Shawn Keulen posted: 2 months ago

    • Transmission removal and replacement.

      This topic has 5 replies, has 3 voices, and was last updated by Dominic Garofolo 2 months ago

      August 24, 2017 at 5:24 am Hi all, The transmission went on the port engine of my 31′ Bertram, roughly 6 weeks ago and I have been unable to find anybody even interested in replacing it. The engine is a Cummins 4BTA (serial number 46043905), and the best I can tell the transmission is a Twin-Disc 5011A / 1.44:1. I am getting the transmission information from the starboard engine because the data plate on the port engine is missing. (see attached pictures). Also I am…

      Started by:  Dominic Garofolo


      5 Replies
      Reply #5 August 30, 2017 at 11:05 am First of all I would like to thank both of you for answering my question. Bill—-> That is a lot of good information, thank you! Now for the odd but good news: I went into the local Marine store here in Cape May to buy some penetrating oil, and ran into an old timer who asked me what I was using it for. I explained what had happened, and he said, “take off the mushroom cap and then try it”. Further he said it sounds like the …

      Last Post by:  Dominic Garofolo posted: 2 months ago

    • Vulcan coupling life

      This topic has 2 replies, has 2 voices, and was last updated by Luke Nelson 2 months ago

      August 26, 2017 at 10:30 pm Hi All, I just left a vessel that has developed a gear oil leak on the main input shaft as it is dripping out the drain on the flywheel housing. It is MG 5114a with 100 hours from rebuild, the gear box has other issues . I don’t trust it and it think it needs to come out fp. All that being said they are still working the vessel 12 hours a day and have a 750nm steam back in 2 weeks. With all the oil on the silicone vulcan coupling how lon…

      Started by:  Luke Nelson


      2 Replies
      Reply #2 August 29, 2017 at 3:56 pm Thanks Tony.

      Last Post by:  Luke Nelson posted: 2 months 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 by Tony Athens 3 months 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


      4 Replies
      Reply #4 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: 3 months ago

    • ZF 220A inspection

      This topic has 7 replies, has 3 voices, and was last updated by Bill Desmarais 3 months ago

      July 23, 2017 at 7:51 am I have a ZF gear on my 6bta 370 with about 3500 hours. I am not having any problems other than gear whine that has been there since I got the boat (1,000 hrs). I cannot afford mid season breakdowns and I am curious if it would be good to remove the transmission and have it inspected during my off season.

      Started by:  Tim Klassen


      7 Replies
      Reply #7 August 18, 2017 at 5:37 pm That’s a Tony question ? 25 Terry Jason down east, 370 6BTA 28 Henriques Sport Fish, twin Volvo 200 41 PA s

      Last Post by:  Bill Desmarais posted: 3 months ago

    • ZF 310 oil change interval?

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

      July 24, 2017 at 1:03 pm I’m at 300 hours on my engine and transmission this year, on my way to 5-600 hours. What’s the frequency of change on the 310? Not having luck with ZF manuals on line.

      Started by:  Larry Backman


      3 Replies
      Reply #3 July 25, 2017 at 7:48 pm All the same….The 311 is also an older “no more made” but good ol’ ZF 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/

      Last Post by:  Tony Athens posted: 4 months ago

    • ZF 220A Hard To Shift Out Of Forward

      This topic has 1 reply, has 2 voices, and was last updated by Rob Schepis 4 months ago

      June 29, 2017 at 5:57 pm At idle speed, I can shift easily between forward, reverse and neutral. After taking the boat out and running, my port transmission requires a fair amount of force to move from forward to neutral. After the initial popping feel when enough force is applied, the shifter moves easily into neutral. Once in neutral at idle speed, the transmission once again moves easily in and out of all positions. The oil level is good and the oil looks clear …

      Started by:  John Fliegel


      1 Replies
      Reply #1 June 30, 2017 at 5:17 am Have you disconnected the cable at the tranny and verified it is not a lever/cable issue? Once confirmed it is not a lever/cable issue investigate the shift valve for marine age. Post some pictures of your engines/gear and specific pics of your gear shift lever. Here’s a link with info and pictorial: ZF220A & ZF220V Shift Valve Lever Repair Kit Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 4 months ago

    • Twin disc 5061A mount to 6bt

      This topic has 5 replies, has 2 voices, and was last updated by Eric Sinner 4 months ago

      June 25, 2017 at 9:46 pm I have been reading over this website for a very long time now. I bought a ’76 25′ inboard Sea Vee and decided to do a ground up restoration with a cummins diesel based on the information avail on this website. With my lack of knowledge, the process has been slow but I would like to do it right the first time around. I am now in the stages of getting to the engine bed and gear mounting positions. There is very limited information on…

      Started by:  Eric Sinner


      5 Replies
      Reply #5 June 27, 2017 at 9:15 pm I appreciate passing on the knowledge and the attachments!

      Last Post by:  Eric Sinner posted: 4 months ago

    • gear dragging in nuetral

      This topic has 17 replies, has 5 voices, and was last updated by Tony Athens 5 months ago

      January 18, 2017 at 11:48 am i have a twindisc 507, just rebuilt. it has a troll valve on it. it drags in nuetral before the rebuild and still does now, you can stop it by holding the shaft by hand, what could cause this?

      Started by:  Lawrence McLoughlin


      17 Replies
      Reply #17 June 20, 2017 at 7:58 pm You are right–It neither feels, or even acts, like regular oil….That’s the whole idea…………………………….. Glad it helped.. 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: 5 months ago

    • gear oil pressure

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

      June 20, 2017 at 2:56 pm what is the proper oil pressure for MG-507 , idle in nuetral, can’t find it in the manual also, where is the location for gear oil temperature for the same gear

      Started by:  Lawrence McLoughlin


      1 Replies
      Reply #1 June 20, 2017 at 7:50 pm Idle /neutral/warm to operating temp is at least 75 PSI.. Once in gear, above 300 PSI.. 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: 5 months ago

    • Chatter

      This topic has 2 replies, has 2 voices, and was last updated by Mike Pettee 5 months ago

      June 11, 2017 at 2:30 pm ZF 220. Developing a chatter noise in neutral and idle forward. It does not do it in reverse. No loss of performance, and it does not appear to be slipping. 1990 Blackfin 32 Combi. Cummins 370s 2006 Scout 190 Costa/Mercury 225 ProXS

      Started by:  Mike Pettee


      2 Replies
      Reply #2 June 11, 2017 at 7:20 pm I have not noticed any other sounds at shutdown or otherwise. Both my engines seem to idle low (sub 550ish per tach, with the port engine being lower thab stbd. I usually bump them to 650 to 700 for my idle speed through the canal. At 660 to 700, the chatter is not existent. I will get in there and get pics the best i can. No dust or anything that i noticed. 1990 Blackfin 32 Combi. Cummins 370s 2006 Scout 190 Costa/Mercury 225 ProXS

      Last Post by:  Mike Pettee posted: 5 months ago

    • qsc 8.3 w/ ZF intermittent reverse

      This topic has 6 replies, has 3 voices, and was last updated by Tony Athens 5 months 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


      6 Replies
      Reply #6 June 8, 2017 at 5:43 am Another thing to check– Remove both solenoids and clean the screens.. Swap the solenoid themselves and when you tighten the top piece, leave them slightly loose so they could be twisted with some light pressure. Grease all lightly before you re-install.. https://www.sbmar.com/articles/zf-shift-solenoid/ 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-tip…

      Last Post by:  Tony Athens posted: 5 months ago

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