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- Cummins Marine Forum Topics
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ZF IRM 220A oil filter housing bracket snapped
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 11, 2023 at 7:28 pm This bracket snapped like a twig. Should have never tried it, but wanted to clean the screen… oh well Can you still buy this bracket? Can it be welded? Can I take the pump off via the 4 bolts? That would allow better access… Any pointers are much appreciated!!! Nik in San Diego
1 ReplyMarch 18, 2023 at 10:27 am Plenty about this posted in Tony’s Tips to “warn about this issue” Anyway, you are not is good shape at all as if you can find a part, you are very lucky. Maybe off a used gear. Harbor Diesel ( Mike Vogt) in Washington may have something? Take it all apart and then take good pics, Send them to me.. “weld-able” very a big maybe  Tony Seaboard Founder & PresidentLast Post by:
posted: 2 years ago
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torsional coupler bolts
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago March 14, 2023 at 5:54 am what should the bolts that hold the torsional coupler to the zf 285 be torqued to (lbs) ? tj35rebuild
2 RepliesMarch 14, 2023 at 4:02 pm If 3/8″ grade 8, then 30 ft lbs w/ grease Seaboard Founder & PresidentLast Post by:
posted: 2 years ago
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fluid capacity
This topic has 2 replies, has 3 voices, and was last updated by
2 years ago March 13, 2023 at 1:10 pm How much oil does my ZF 286 IV hold?
2 RepliesMarch 14, 2023 at 5:51 am Here it is: ZF286IV oil capacity Rob "Luck is the residue of good design."Last Post by:
posted: 2 years ago
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Torsion coupling install
This topic has 4 replies, has 3 voices, and was last updated by
2 years ago March 2, 2023 at 5:12 pm Searched a bunch but still need some advice. I purchased new Centa CF-r torsional coupling for a 280 1a gear from here. Went to install but the instructions that came with the coupling were pretty confusing.  Seems like the directions are starting as if the coupling is disassembled? pics included Mine came in one piece but there was some washers and a strap in a bag? Washers i get but not sure about the strap? Must be for assembly? Also not…
4 RepliesMarch 7, 2023 at 5:53 am Your particular CFR coupling would have come fully assembled and ready to install–Ignore the “instructions and strap”.. Washers are used on the attachment bolts. Lube all with at lease a full tablespoon on common lithium grease inside the spline cavity and on the male spline too (which needs a “O” ring on it to keep the grese in the spline.. Nothing to measure–it all takes care of itself Seaboard Founder &#…Last Post by:
posted: 2 years ago
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Coupler torque spec
This topic has 3 replies, has 3 voices, and was last updated by
2 years ago
February 19, 2023 at 3:09 pm Hello, I have a ZF 302V-LD transmission and canât find any info on what the torque value is for the shaft coupler to the trans flange. Any info you have on this would be greatly appreciated. Todd
3 RepliesFebruary 27, 2023 at 1:34 pm Thank you, really appreciate this, they are the 16mm 12 point bolts and will torque them to 100 ft/lbs. Sure wish you had a shop on the Great Lakes lol, hint, hint.ÂLast Post by:
posted: 2 years ago
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LA CAJA ZF 220 A
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago January 24, 2023 at 1:13 am HOLAÂ SE ME HA GASTADO DONDE LLEVA LOS ANILLOS DELA MARCHA ATRAS COMO SI ESTUBIERAN MAL LOS COJINETES IDENTIFICAR BETANCOR
1 ReplyJanuary 24, 2023 at 10:16 am ÂżQuĂŠ estĂĄ pasando exactamente? ÂżRuido extraĂąo? ÂżFuga? ÂżDeslizamiento? explica mas por favor Rob "Luck is the residue of good design."Last Post by:
posted: 2 years ago
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Twin Disc 506(?) delayed oil pressure and shifting
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago
January 9, 2023 at 12:11 am I have a Twin Disc that I believe to be a MG-506(-1?), original equipment on a Cat 3208T circa 1982-83. OEM trolling valve was added by previous owner It worked just fine. and then there was a (possibly related) starting fluid high rev event. Now the transmission takes about 15 seconds to build pressure and shift the first time you engage it in either direction. If it’s been in gear and you go neutral and back into either gear, it will co…
2 RepliesJanuary 20, 2023 at 12:42 pm Thanks for the suggestion. I’ve tested shifting on the unit by moving the selector valve arm fully to the detents, and still the same result. I need to do the same with the trolling valve arm, even though the helm control is fully disengaged. I had a phone conversation with Twin Disc corporate, and was told that based on the symptoms and the model/vintage, it was most likely the clutch piston seals starting to go, and I should contact one …Last Post by:
posted: 2 years ago
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PSS Shaft Seal Cooling Line Connection – Cummins 6BT
This topic has 4 replies, has 2 voices, and was last updated by
2 years ago January 16, 2023 at 8:02 am I have a single engine Cummins 6BT 5.9M 220 hp Trawler (new to me boat) that has a cooling line running from the gear cooler raw water drain hole to the PSS shaft seal. Iâm not happy with the connection since it is below the water line and only has room for one small clamp on the clear vinyl hose. As far as I know the boat has operated like that for awhile. questions: Is having a cooling line a good idea? PSS says that the shaft seal only needs …
4 RepliesJanuary 16, 2023 at 6:15 pm Thanks Tony. Your advice is much appreciated!<br /><br /><br />Last Post by:
posted: 2 years ago
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Torsional Coupling
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago
January 13, 2023 at 3:35 pm Iâm in the middle of installing new long blocks, and when separating the gears from the engines I found my boat currently has Centra CF-FS-30 couplings (SAE 11.5â). The boat is powered by 6BTA 370 engines and has ZF200A gears (1.75 ratio). Â Is there a direct replacement to the centra that is recommended that would require any other modifications? Â The current couplings are 23 years old now and have 1700 hours on them so while everything is apart…
2 RepliesJanuary 13, 2023 at 5:36 pm Thank you, I was concerned with the description that says not for cummins engines. Â Is there any specific reason to be afraid to use these? Â Itâs recreational use, less than 200 hrs per year. ÂLast Post by:
posted: 2 years ago
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Transmission o Port side slightly high pressure on gauge
This topic has 5 replies, has 3 voices, and was last updated by
2 years ago
January 4, 2023 at 11:23 pm Hi, I have ZF 80 transmissions in my boat with 370 6BTA engies, the port side seems to run at a high pressure o the gauge. What woould be thepossible issue causing this? Also do you sell the dripless shaft seal mainteace kits, 1 3/4″ Shaft – 3″Log. Cheers James
5 RepliesJanuary 8, 2023 at 3:43 pm Hi Tony, No issues, it’s just that time to change the bellows, is that kit available on your website? I like to have a clean engine room, to show if any issues arise, they are identified easily. Cheers JamesÂLast Post by:
posted: 2 years ago
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Gearbox Ratio
This topic has 18 replies, has 4 voices, and was last updated by
2 years ago
December 24, 2022 at 7:33 am Hi, I am hoping that someone can help me with a gearbox issue. I have a Princess 368, 1992, running with 2 x 6BTA5.9M2 300hp and I have recently (June 2022) replaced both my ZF220A gearboxes. The original gearboxes were IRM Â 220A 1:1.533 (Red info plates) and the new ones are ZF220A 1:1.533 (Blue info plates). Old and new gearboxes identical apart from the info plates. Since installing the new gearboxes I have had a reduction in power. With the …
18 RepliesDecember 31, 2022 at 4:57 am Yes, posted earlier: Engine revs at idle (under load) 670rpm, Â shaft rpm 438. Both sets fo readings for both engines were very similar.Last Post by:
posted: 2 years ago
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TWIN DISC PRESSURES AND DARK FLUID
This topic has 12 replies, has 7 voices, and was last updated by
2 years 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…
12 RepliesDecember 27, 2022 at 11:47 am After having that issue that I described  above the t transmission fluid has been fine. I change them every 250 hours and they look the same.ÂLast Post by:
posted: 2 years ago
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Hurth Transmission
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago December 19, 2022 at 3:45 pm I am needing to replace a Hurth HSW 800 A2-2.0 transmission that is slipping badly. Is the ZF85A a direct replacement?Â
1 ReplyDecember 19, 2022 at 4:33 pm Yes sir. A direct replacement as to fit but improved. Rob "Luck is the residue of good design."Last Post by:
posted: 2 years ago
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Which Transmission Oil Filter??? – ZF286A
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago December 12, 2022 at 9:24 am ZF says to use part # 3213-308-019. SBMAR has Cummins part LF701 listed, but only for transmissions with the MB30 valve, which I donât believe I have because Iâm using electronic throttles. Previous owner had been using Cummins HF6531. Attached are pics, which filter do I use??? Thanks everyone! Â Â
1 ReplyDecember 12, 2022 at 6:19 pm MB 30/31 / EB 30/31 –Same oil filter      Only difference between the LF701 and what you have (LF6531)is the total capacity/volume…….. Makes no real difference in your application–Or spend 5X the $$ and buy the ZF filter ( just rebranded w/ a ZF $$) . BTW, your valve is really a EB31 Seaboard Founder & PresidentLast Post by:
posted: 2 years ago
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ZF 80A vs ZF 85A
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago December 6, 2022 at 9:18 am Can a ZF 80A transmission be replaced with a ZF 85A directly or with minor modifications? This is for a 2007 Meridian 341 with a trashed ZF 80A (1.96:1 ratio) coupled to Cummins QSB 5.9 rated at 330HP. Thanks, Jim McMillen 954-646-3640
1 ReplyDecember 6, 2022 at 9:46 pm 100%Â “Plug & Play” Seaboard Founder & PresidentLast Post by:
posted: 2 years ago
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Torsional Coupling Replacement
This topic has 3 replies, has 3 voices, and was last updated by
2 years ago
November 23, 2022 at 4:06 pm Iâm planning to replace the torsional coupling on one of my engines. The drive train has a lot of gear chatter at idle and I doubt these have ever been replaced before so this is going to be my winter project while the boat is on the hard. Since the coupling is neither engine nor transmission, it seems there is limited technical information on replacement, although I see previous mention that it is âmechanics 101â. For the novice like me, I wa…
3 RepliesNovember 23, 2022 at 8:26 pm I believe the idle speed on that engine is somewhere around 600-700. The other engine seems to be set lower so I do hear the power pulse Clark is discussing on that engine.  The engines are 1989 vintage but only have around 1500 hours on them. This particular engine had a slight mis-alignment issue for a number of years due to a cracked engine mount bolt (bolt going through the stringer) that was difficult to find. It was there when I bought …Last Post by:
posted: 2 years ago
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ZF 280 A1 Electronic Trolling Valves – Adjustment?
This topic has 3 replies, has 2 voices, and was last updated by
2 years ago
August 24, 2022 at 10:04 pm I have twin Cummins QSB 5.9s with ZF 280 A1 transmissions. Recently had electronic trolling valves installed. My dealer is very inexperienced with these and is somewhat stumped with the issue we are having. The trolling valves seem to work fine at the dock and when the engines are cold. After a quick cruise, however, the trolling valves will not engage. The lights on the solenoids and the controls all seem to be working correctly.  Sometim…
3 RepliesNovember 17, 2022 at 8:26 pm Hello Tony, could you take a look at the post below where I posted a reply and pics? Thank you.Last Post by:
posted: 2 years ago
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Meridian 411 – QSB 380 HO – ZF 85A
This topic has 5 replies, has 3 voices, and was last updated by
2 years ago
November 9, 2022 at 2:27 pm I am lookin for suggestions. My friend purchased a 2007 Meridian 411 with Cummins QSB 380 HP HO engines. It originally came with ZF 80 gears with a 2.0:1 ratio. The transmissions were upgraded due to an issue with the coupler which caused torsional vibration. The new gears were a ZF-85A. The boat topped out at 30 knots at 3100 RPMs. Last year he had a situation where the starboard prop hit bottom. The props were sent out for reconditionin…
5 RepliesNovember 10, 2022 at 8:23 pm Very observant! The original survey I have from 2016 was in knots. 30 knots at WOT. I have a hard time believing that it could possibly hit 30 knots. The new speed is in MPH. Took it out again today and tried to check the propeller shaft RPMs at WOT. Was unsuccessful. the tachometer wasn’t working properly. We will try again in a couple days.Last Post by:
posted: 2 years ago
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ZF220A hp capacity?
This topic has 3 replies, has 2 voices, and was last updated by
2 years ago November 3, 2022 at 8:20 am Can you tell me the maximum HP the ZF220A can handle when paired with the Cummins QSB5.9? recreational usage.
3 RepliesNovember 4, 2022 at 7:07 am Using a ZF220A on new QSB 6.7 425 (max rated at 417BHP 3070RPM) is a no brainer for me. Prop the engine at 400HP/3100-3150 RPM ( 85-90% load at 3000 RPM) and you’ll never look back. Seaboard Founder & PresidentLast Post by:
posted: 2 years ago
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ZF220a on 6TBA
This topic has 5 replies, has 3 voices, and was last updated by
2 years ago
September 21, 2022 at 9:53 am Greetings, Had the fluid checked on the ZF220a transmissions, they came back high on the copper. The number was 432/442 for both transmissions. How worried should I be?  Thanks,
5 RepliesOctober 26, 2022 at 6:42 pm Here is an article about this problem.   Read it through. Copper and Your Diesel Engine Oils (machinerylubrication.com) This can be a frequent result if the oil mfgr. and oil was changed recently.Last Post by:
posted: 2 years ago
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ZF IRM 220A oil filter housing bracket snapped
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