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general question to all – rpm at idle
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago
June 9, 2021 at 12:52 pm qsb 5.9 420hp (2008) up until beginning of last year both engines at idle were at same RPM (660) — starting last season port is 640 and Stb is 660 .. so they are off by 20 rpm … this is steady and hasnt changed since last year .. was wondering: – if anyone else had this or has seen this – is it bad ? ( has not affected any performance or top of rpm range ) – if anyone has seen this is there any way to equal them ag…
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in: Cummins Marine Engines
2 RepliesJune 10, 2021 at 7:00 am Thks Tony … LOL — Smartcrap … !!!!! come to think of it .. i have to check my analogue gauges to see if they match RPM . DUH …. ilkl check back in and let you guys know what SMARTCRAP i find outLast Post by:
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1000 hour service question
This topic has 5 replies, has 4 voices, and was last updated by
June 8, 2021 at 7:24 am So my 2008 qsb 5.9 is coming up on 1000 hours …. running great … I do all the standard yearly maintainence myself. ( oil , filters, , zincs etc ) heat exchangers are good and temp is steady at 178 . my question is: I got a quote from cummins for 14k !!! ( parts 7+k labor 6k .. tax etc ) for the 1000 service on the engines .. from what im seeing in the quote the big things in it are clean / test heat exchangers clean test aftercoole…
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5 RepliesJune 9, 2021 at 8:41 am Rob as always youre the man … thank you .. tony kudos to you for this site in general .. combination of our community and the resources and knowledge you provide is invaluable to our Cummins communityLast Post by:
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Need new alternator
This topic has 6 replies, has 4 voices, and was last updated by
4 years ago
August 4, 2019 at 7:48 am Tony…rob .. One of my alternators is only pushing 11v so its going /gone bad .(tested with my meter )..need to know which one to order from sbmar. Here are some pics to help Thanks and let me know
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6 RepliesAugust 8, 2019 at 6:22 am Have you considered rebuilding your alternator? Any good alternator/starter motor repair guy can do it. I had my Delco Remy 105 amp alternator rebuilt ($160) to include regulator, diode trio, battery post, and a 160 amp stator. This Delco frame can take a 200 amp stator. In 14 years I’ve had this alternator rebuilt twice. Both times where failures in components due to salt air environment. For the last couple of years, I pull the alt…Last Post by:
posted: 4 years ago
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qsb 5.9 random loss of propulsion at cruise
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This topic has 21 replies, has 4 voices, and was last updated by
July 1, 2019 at 6:47 am Hey Tony and Rob .. and fellow board members .. hoping someone can offer insight on my issue .. first off i have 2 qsb 5.9 2008 with 875 hours on them. no issues outside of this one that popped up over the weekend . so while at cruise speed ( 2600 rpm ) the boat will be running good then all of a sudden lose propulsion to both motors .. the motors will stay on but go into a neutral like state. i then have to back down the throttles to actua…
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July 31, 2019 at 3:46 pm yes Corey exactly that … the cable that goes from the throttle to the glendenning ecc unit ( round with pins ) .
21 Replies
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ratcheting wrenches
This topic has 4 replies, has 4 voices, and was last updated by
6 years ago October 27, 2017 at 5:32 am question to all … i know these are key to have but there are so many out there … metric / sae etc .. what is a good go to set for our cummins family …. set of 12 metric flexible ratcheting wrenches ? go for broke and get 12 metric and 12 sae ? is getting flexible even worth it ?
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4 RepliesOctober 27, 2017 at 5:24 pm Rob Schepis wrote: Make that two nutdrivers, a 5/16ā and a 7mm. Some hoseclamps you āmayā come across are 7mmā¦. and don’t over tighten the fancy clamps on the Cummins engines. I’ve busted one or two over the years.Last Post by:
posted: 6 years ago
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fuel difference issue
This topic has 16 replies, has 6 voices, and was last updated by
6 years ago September 7, 2017 at 11:34 am I have 2 2007qsb 5.9’s in a formula 40pc with2 125 gal tanks they both run great and have about 800 hours on them and have seen a trip tis year from nc to ny without a hiccup issue im seeing is an up to 1gph difference between the port and starboard engine at cruise speed …starboard is the one the shows as using more. no performance issues at all … all other data is similar between the 2 and when at low speed the numbers ( g…
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16 RepliesOctober 18, 2017 at 3:10 am From my own experience, I have yet to find two engines in a vessel that operate much closer that you have.. Under some conditions they something seem very even, and then they don’t under others….Look at the attached pic & always work that into the equation.. I have learned this is be true with most all of the operating parameters on the digital screen.. Besides fwd & rev gear ratios (Clutch Pos A vs. Pos B) are not always…Last Post by:
posted: 6 years ago
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oil change for zf-85-iv 2.0
This topic has 12 replies, has 4 voices, and was last updated by
6 years 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
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12 RepliesOctober 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:
posted: 6 years ago
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oil change on qsb 5.9
This topic has 3 replies, has 3 voices, and was last updated by
6 years ago September 29, 2017 at 12:40 pm have dual 2007 qsb 5.9’s 425 … bought the boat in jan this year gettign ready for winter layup and want to change the oil .. is 15w40 synth good oil for this engine ? how much do i need for each engine have a reverso plumbing was going to pull out with reverso and put in up top , good? also have an ONAN gen model 9mdkbk-4555 used 1x this year for about 8 hours … oil was new in jan when i bought her, should i change that …
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3 RepliesSeptember 30, 2017 at 8:12 am No synthetic engine oil for me either. Simply a waste of money. Do your oil changes on time hour wise, use a Fleetguard premium oil filter and prop the engine according to Seaboard specs for electronic engines. I use Shell Rotella 15-40 T4 or Mobil Delvac 1300 15-40 Valvoline is fine too.Last Post by:
posted: 6 years ago
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qsb 5.9 intermittent loss of thrust
This topic has 13 replies, has 4 voices, and was last updated by
July 5, 2017 at 4:47 am i have set a 2007 qsb 5.9’s in my formula 40 pc that Rob has seen personally … overall have no issues with them and they run great .. ive have several situations where i will be running and lose the digital throttle control . All 4 lights on the throttle start to blink and i have no propulsion at all .. i have to then shut down the engines and then restart them to get propulsion back … happens very sporadically and sometimes…
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13 RepliesAugust 9, 2017 at 3:24 pm anything to help my fellow cummins guys and the forum overall ..Last Post by:
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Qsb 5.9 425 questions
This topic has 3 replies, has 3 voices, and was last updated by
7 years ago April 4, 2017 at 2:40 pm New to me 2007 formula with Qsb 5.9 425 ho.Ā Plan in bringing her home from NC to Nyc early may and want to change the fuel filters before we leave. 2 questions 1. Which micron should I start with for the racors 30 or 10? When I change the last chance filters I was told that i should prefill them with diesel and then cycle the key 4 times at 15 second intervals to bleed the air.Ā Is this the best way to bleed my qsb’s Thanks for the assist…
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3 RepliesApril 5, 2017 at 5:19 pm One side of the filter head will be plumbed from theĀ Racor, that is the IN….The other side is plumbed to the on engine fuel delivery, that is the OUTLast Post by:
posted: 7 years ago
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general question to all – rpm at idle
