This forum contains 66 topics and 314 replies, and was last updated by  Jen Wren 1 week ago.

Viewing 20 topics - 1 through 20 (of 65 total)
    • Cummins Marine Forum Topics
    • QSC 8.3 500 and ZF280-1A Tourque?

      This topic has 13 replies, has 4 voices, and was last updated by Tony Athens 3 weeks ago

      January 14, 2019 at 5:32 am New here but not to boating and hoping for some help. I am researching my next boat and found a 46″ boat with these engines and gearboxes however looking at the spec sheets the gearbox seems to not handle the max torque of the engine. I am reading max allowed torque on the gearbox is 1100 Nm and the engine deliver up to 1700 Nm. Is this as bad as it looks or is there something to this that I am missing? Looking for my next boat.

      Started by:  Michael Jungvid


      13 Replies
      January 24, 2019 at 5:58 pm Tell the broker to send some really good pictures of the engine, the gear, the exhaust, the aftercooler and everything else in the engine room so I can see what you are dealing with.. Throw in the helm station(s) too.. He needs to earn his keep.. If you are even considering a purchase of a vessel “remotely” without this most basic info (very good pictures of the mechanical equipment and all of the sub-systems) in front of you,…

      Last Post by:  Tony Athens posted: 3 weeks ago

    • Twin Disc MG 5050SC oil leak

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

      October 15, 2018 at 7:01 pm I have a twin disc MG 5050SC attached to a Cummins 270B in a Nordic Tug. The transmission has been in service for 13 years/3000 hours, and recently developed a leak/small drip from the gasket between the oil pump and the transmission. I have replaced the gasket without effect, even trying various gasket sealers. The leak appears to occur, or get worse, when the transmission is engaged. There is no evidence of cracking on the pump or transmis…

      Started by:  Peter Abbott


      4 Replies
      January 20, 2019 at 8:36 pm Peter, Glad you stuck with it & followed thru…………………………..I’m especially glad all is solved.. YA DONE A VERY GOOD JOB! 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 weeks ago

    • eb15 solenoid plug

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

      January 10, 2019 at 2:19 pm i have thorougly checked through your website but still can find a plug/cap with built in wires for the eb15 solenoid. please see posted picture. the plug i found does not have wires. Attachments:You must be logged in to access attached files.

      Started by:  jalopez


      1 Reply
      January 10, 2019 at 3:43 pm Try this Home » Seaboard Marine Store » Marine Transmission Parts & Documentation » ZF Electronic Shift Solenoid Wire Plug/Cap https://www.sbmar.com/product/zf-electronic-shift-solenoid-wire-cap/

      Last Post by:  Philip posted: 1 month ago

    • Location of pressure sensor?

      This topic has 7 replies, has 3 voices, and was last updated by Rob Schepis 1 month ago

      December 21, 2018 at 3:38 pm I have a Twin disc 506 gear, bought the sensor and gauge (thanks Cory!), ran the wires, ready to install. what’s the best location for the sensor? Thank you!

      Started by:  donald roth


      7 Replies
      January 8, 2019 at 6:42 am donald roth wrote: Do you mean that the venerable Rector Seal #5 is not up to this task? Thanks for the headsup, I don’t need any transmission leaks! Yea, for this high pressure small thread assembly the RS can leak. If the switch ever needs to come out even with the JB weld a 12mm wrench will break the connection and back the switch right out. Rob "Luck is the residue of good design." Attachments:You must be logged in to access attached files.

      Last Post by:  Rob Schepis posted: 1 month ago

    • zf solenoid wire plug

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

      January 6, 2019 at 3:46 pm where can i find a zf electronic shift solenoid wire plug with built-in wires for the eb15 solenoid? Attachments:You must be logged in to access attached files.

      Started by:  jalopez


      1 Reply
      January 6, 2019 at 6:21 pm Lots of stuff on this site.. Just tell me EXACTLY what part you want.. We have it all.. 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-tips/ Attachments:You must be logged in to access attached files.

      Last Post by:  Tony Athens posted: 1 month ago

    • ZF Hurth 63a Neutral Safety Switch wiring.

      This topic has 1 reply, has 2 voices, and was last updated by Rob Schepis 3 months ago

      November 2, 2018 at 9:40 am Hi Guys, Where does the wiring for a Neutral Safety Switch on a ZF Hurth 63a transmission usually go to? It’s botled up to a MerCruiser 350 MPI. Thanks, Pat

      Started by:  Patrick Presti


      1 Reply
      November 2, 2018 at 1:58 pm Here’s a few shots Rob "Luck is the residue of good design." Attachments:You must be logged in to access attached files.

      Last Post by:  Rob Schepis posted: 3 months ago

    • twin disc 5061a 1.5 to 1

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

    • Checking the fluid level in a ZF63A Gear

      This topic has 2 replies, has 2 voices, and was last updated by Bill Desmarais 4 months 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: 4 months 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 4 months 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: 4 months ago

    • ZF301A loud whine then no forward or reverse

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

    • qsc 8.3 w/ ZF intermittent reverse

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


      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: 5 months ago

    • Twin Disc MG5075

      This topic has 9 replies, has 2 voices, and was last updated by Lawrence Ross 5 months 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: 5 months ago

    • Help id transmission (hopefully)

      This topic has 5 replies, has 3 voices, and was last updated by Shawn 5 months 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: 5 months ago

    • ZF280A- topping up Transmission Oil.

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

    • Low pressure in ZF 63A

      This topic has 6 replies, has 3 voices, and was last updated by Nigel Kittow 5 months 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: 5 months ago

    • Dexron IIIH

      This topic has 2 replies, has 2 voices, and was last updated by Thomas Hale 6 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: 6 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 6 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: 6 months ago

    • zf 80 lv temp specs

      This topic has 11 replies, has 4 voices, and was last updated by Europeanautoctr 6 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: 6 months ago

    • Twin Disc MG507 No reverse?

      This topic has 2 replies, has 2 voices, and was last updated by Chris Braud 7 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: 7 months ago

    • Hurth Shift valve testing

      This topic has 2 replies, has 2 voices, and was last updated by Hy Pryluck 7 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: 7 months ago

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