This forum contains 51 topics and 250 replies, and was last updated by  Thomas Hale 1 week ago.

Viewing 20 topics - 1 through 20 (of 51 total)
    • Cummins Marine Forum Topics
    • Dexron IIIH

      This topic has 2 replies, has 2 voices, and was last updated by Thomas Hale 1 week 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
      Reply #2 August 6, 2018 at 5:36 am Thank you for your prompt reply. 411 Walnut St #7130

      Last Post by:  Thomas Hale posted: 1 week 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 1 week 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 Looks like this is an older model that has been replaced by the ZF 80A Thanks in advance.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
      Reply #4 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:

      Last Post by:  Tony Athens posted: 1 week ago

    • zf 80 lv temp specs

      This topic has 11 replies, has 4 voices, and was last updated by Europeanautoctr 1 week 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
      Reply #11 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: 1 week ago

    • Twin Disc MG507 No reverse?

      This topic has 2 replies, has 2 voices, and was last updated by Chris Braud 1 month 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
      Reply #2 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: 1 month ago

    • Hurth Shift valve testing

      This topic has 2 replies, has 2 voices, and was last updated by Hy Pryluck 1 month 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
      Reply #2 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: 1 month ago

    • ZF 325 Low Pressure – Slow response

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

    • ID Label – ZF Marine gear box

      This topic has 3 replies, has 3 voices, and was last updated by glenn111 2 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
      Reply #3 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: 2 months ago

    • ZF Model 80lv low pressure

      This topic has 4 replies, has 2 voices, and was last updated by Europeanautoctr 2 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
      Reply #4 May 27, 2018 at 5:17 pm PS no dragging on the sahft

      Last Post by:  Europeanautoctr posted: 2 months ago

    • ZF 325 1A Valve Block Leak

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

    • ZF Marine IRM280PL gear rattle / chatter

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 3 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 Replies
      Reply #1 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: 3 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 4 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
      Reply #3 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: 4 months ago

    • ZF 220A transmission pressure

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

      April 5, 2018 at 3:51 pm Hello all, My transmission gage on my ZF 220A only reads when the trans is shifted into reverse. The starboard trans works in forward perfect. I don’t see another port to install the sender into. I replaced the sender thinking it may be the issue the the same problem is still occuring. Thanks Joe

      Started by:  Joe

      2 Replies
      Reply #2 April 5, 2018 at 8:57 pm Have you seen the following article? ZF 220A or 220V Pressure and Temperature Sender or Switch Locations Corey Schmidt VP, Operations Seaboard Marine, Inc.

      Last Post by:  Corey Schmidt posted: 4 months ago

    • Opinions on gear/engine match

      This topic has 9 replies, has 2 voices, and was last updated by David Wesner 4 months 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

      9 Replies
      Reply #9 March 20, 2018 at 7:18 am 10-4

      Last Post by:  David Wesner posted: 4 months ago


      This topic has 9 replies, has 5 voices, and was last updated by Tony Athens 5 months ago

      February 27, 2018 at 6:54 pm Ever since the new engines (QSB6.7) and trans package MG5065SC was installed. The port has a 15 psi lower pressure at idle than the starboard but that changes when you are in gear and the port is about 50 psi higher at full throttle. Twin Disc (Awful customer service) was never able to tell me why and thought perhaps the numbers are bogus. They are both hooked up the same. All the readings on the vessel view are very close or the same for ev…

      Started by:  Roy Beasley

      9 Replies
      Reply #9 March 5, 2018 at 6:13 pm So for sure, you are using what they recommend.. I usually see SAE 30 but that is not of any real concern anyway.. Here is what I think.. During the first couple 100 hours of use, for some reason or another, the one gear went thru a period to where the clutches slipped some at times and darkened the oil..Don’t know why.. When you changed it, I’d guess 20% of the old oil was still in the system so it added some color to the new oil.…

      Last Post by:  Tony Athens posted: 5 months ago

    • ZF 325 -1A low gear oil pressure

      This topic has 2 replies, has 2 voices, and was last updated by a_schmitt 6 months ago

      January 19, 2018 at 2:28 pm Hello and thank you for any help with my problem. First post on the forum. I have a new to me 46 foot Bertram sport fish that was completely redone in 2011/12. Re-powered with QSM11 reman’s with ZF 325–1 A transmissions. These are electric shift throttles and trans run by a Gleninning system with trolling valves. Gear pressure is low on starboard trans running about 100 psi, consistent in neutral or in gear. Have not noticed a performa…

      Started by:  a_schmitt

      2 Replies
      Reply #2 January 26, 2018 at 3:39 am Well I’m a little embarrassed, at least I don’t have a gear problem. I discovered that this boat has two different transmission controllers. The starboard gear has a EB 30 controller, port has the EB 31 controller. The low pressure on the starboard gear led me to believe that I had a transmission problem. The EB 30 controller does not show full operating pressure until put in gear and given some rpm. The EB 31 controller shows full oper…

      Last Post by:  a_schmitt posted: 6 months ago

    • Shift delay

      This topic has 4 replies, has 3 voices, and was last updated by Philip 7 months ago

      December 21, 2017 at 6:42 pm My ZF285A transmission has a shift delay programmable through the Glendinning EEC3 control with a range of 0-2.5 seconds with a default of 1.0seconds. Nothing wrong with the transmissions. Things that make me go hmmm… What is the purpose of this delay? Why would one be inclined to change from the default of 1.0seconds and what’s the reason 1.0 seconds is the default. Phil

      Started by:  Philip

      4 Replies
      Reply #4 January 4, 2018 at 8:57 pm Just to close the thread, I spoke with Rick at Glendinning. For those that have Glendinning controls, Rick is a wealth of knowledge and a true gentleman who solved this mystery. There are two delays, both designed as preventative measures. For those that have never driven electronic shift/throttles they are silky smooth and it’s easy to bump them in a moving boat. And yes there are friction adjustments for both detention and movement, but even…

      Last Post by:  Philip posted: 7 months ago

    • ZF 220a Drain Plug Thread Size

      This topic has 3 replies, has 3 voices, and was last updated by Rob Schepis 8 months 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

      3 Replies
      Reply #3 November 27, 2017 at 6:32 am Pat, Regarding the 220A, check out this topic .. Removing the Magnet / Screen Hex Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 8 months 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 9 months 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: 9 months ago

    • Rebuild or Conversion

      This topic has 7 replies, has 2 voices, and was last updated by Tony Athens 9 months 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: 9 months ago

    • TD 5065 Trans

      This topic has 9 replies, has 2 voices, and was last updated by Anthoni Lightbourne 10 months 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: 10 months ago

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