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Cummins:B Series
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Cummins:B Series Solenoid Stop (fuel shutoff) Valve VIEW/REPLY   Notify me of any new messages to this topic. 2  Thu Sep 9 10 2:19 AM
Yesterday
02:56 PM
Level-1 Member Steve Littman   Underway @ 14 knots in heavy seas (35´ Duffy, Cummins 370B 5.9), engine stalls, then continues to try to crank even after key is turned off. After about 10 seconds, the solenoid stop (fuel shutoff) va.....
2 Responses....
Today
01:54 AM
#1 Forums Moderator Tony Athens   Sounds like is 100% related to an electrical issue..........Wet, corroded, rusty, loose or?? wires, connections, etc..... Post some clear pics showing that side of the engine and we´ll start there.. A.....
Today
02:19 AM
#2 Level-1 Member F.C.Lowell   Steve, where are you located. I am in Woods Hole, also have Duffy 35/B300. pete

Cummins:B Series Fuel Filter Removal VIEW/REPLY   Notify me of any new messages to this topic. 1  Wed Sep 8 10 8:20 PM
Yesterday
02:18 PM
Level-1 Member Timjet   I´m trying to change the secondary fuel filter, the one on the engine on my Cummins 6 330B-AT and am having troubling removing it. It´s located on the stbd side of the engine. I have been able to get .....
1 Response....
Yesterday
08:20 PM
#1 Level-1 Member Bruce M   There are wrenches that grab the bottom of the filter.

Cummins:B Series Changing pencil zinc VIEW/REPLY   Notify me of any new messages to this topic. 6  Tue Sep 7 10 11:58 PM
Sep 3 2010
09:15 PM
Level-1 Member Mike Thomas   I am trying to change the pencil zinc on the engine of my BT6 but the old one dissolved in the space and the new one doesn´t want to fit. How do I get out the old zinc debris?
6 Responses....
Sep 4 2010
04:08 AM
#1 Level-1 Member Overtemp Marine   Hi Mike: I change alot of zinc´s old ones and broken off pencils I use a shop vac sometimes to suck up old broken pencils also Mechanic fingers you can pick them up at any auto parts store the plunger.....
Sep 4 2010
03:02 PM
#2 Level-1 Member Mike Thomas   Mechanic fingers. Interesting, never heard of them. This is a tool and not a liquid solution of some sort I assume. I will get this. Thanks -mt
Sep 5 2010
10:49 AM
#3 Level-1 Member Dominic   I take the SS long thin flat skinny metal piece from an old windshield wiper blade. Cut off a small 6" piece and then Bend it in half into a tweaser. It´s long and thin enough to fit into the h.....
Sep 5 2010
12:43 PM
#4 Level-1 Member Fishn2day   If none of the mentioned tries work, disconnect hose and back flush through zinc fitting to wash out. On some installs when using universal pencils, stick a screwdriver in fitting and measure distance.....
Sep 7 2010
10:46 PM
#5 Level-1 Member Mike Thomas   So the Off-the-shelf Zinc could be too long! Hadn´t considered that. Thanks -mt
Sep 7 2010
11:58 PM
#6 Level-1 Member Dave T/t Katrina   I once had this problem. I made a trip to the Home Depot and bought some plumbing fittings with the same thread as the base of the pencil zinc. I then removed a pencil zinc from another location o.....

Cummins:B Series Alternator Testing VIEW/REPLY   Notify me of any new messages to this topic. 7  Tue Sep 7 10 5:25 PM
Aug 27 2010
02:37 AM
Level-1 Member Maka Koa   What is the best way to test an alternator?
7 Responses.... Open/CloseView ALL
Sep 7 2010
05:25 PM
#7 Level-1 Member Tom   I replaced mine, brand new for $250. I got it in Pt. Judith, RI

Cummins:B Series Aftercooler Maintenece VIEW/REPLY Includes Attachments Notify me of any new messages to this topic. 7  Tue Sep 7 10 5:22 PM
Aug 27 2010
12:10 PM
Level-1 Member Capt Mike   I recently pulled maintenence on my aftercooler on my 370b. My problems is now it´s leaking water into my cylinders. I´m working thru that issue and will have the engine water free and running today .....
Open Topic to View Attachments
7 Responses.... Open/CloseView ALL
Sep 2 2010
04:11 PM
#6 Level-3 Member Brad K.   this should help ...... Brad
Sep 7 2010
05:22 PM
#7 Level-1 Member Tom   Mike, I ran into the same thing earlier this summer. When cleaning out the aftercooler, it started leaking. I built a pressure test rig (aluminum plate top and bottom with rubber for gaskets, h.....

Cummins:B Series Oil change VIEW/REPLY   Notify me of any new messages to this topic. 2  Tue Sep 7 10 2:20 PM
Sep 6 2010
11:32 PM
Level-1 Member Jimbob   I kept this topic separate from my previous topic regarding fuel storage, in the interest of topic searches. if i change the oil one season, but only run the engine 20 or so hours; how important is.....
2 Responses....
Sep 6 2010
11:56 PM
#1 Level-3 Member Ski in NC   Give the boat a good run on plane before going into storage. That will cook out any moisture in the oil. Should be fine over storage and for next season. 20hrs is basically new oil. Usually best t.....
Sep 7 2010
02:20 PM
#2 Level-1 Member Jimbob   thanks Ski. makes a lot of sense.

Cummins:B Series Bottom paint VIEW/REPLY   Notify me of any new messages to this topic. 3  Tue Sep 7 10 2:17 PM
Sep 6 2010
11:39 PM
Level-1 Member Jimbob   Again, in the interest of assisting in topic research, i am posting this question separately from others regarding the longevity of product viability. if i use a high quality bottom paint, but keep.....
3 Responses....
Sep 7 2010
12:00 AM
#1 Level-3 Member Ski in NC   If you keep it in a lift most of the time, you really don´t need bottom paint. If paint gets old on the lift, then you leave it in the water for a solid month, you may get some growth. The amount of.....
Sep 7 2010
02:06 AM
#2 Level-1 Member Maka Koa   Different paints react differently. Some paints will lose there effectiveness when left out of the water for a period of time while others will not. If you plan on having your boat out of the water.....
Sep 7 2010
02:17 PM
#3 Level-1 Member Jimbob   Thanks. i am planning on taking 2-3 month trips during the next few years, and the rest of the time the boat will be in the lift. i did apply the ablative paint last year, so we´ll see.

Cummins:B Series Storing fuel VIEW/REPLY   Notify me of any new messages to this topic. 0  Mon Sep 6 10 11:26 PM
Sep 6 2010
11:26 PM
Level-1 Member Jimbob   I like to have 10 gallons of diesel fuel stored for emergencies. my question is: how long will a couple of jerry cans of diesel stored in a dark place be good to use?
NO Responses....

Cummins:B Series Submerged 4bt 3.9 need advice VIEW/REPLY   Notify me of any new messages to this topic. 7  Mon Sep 6 10 3:22 AM
Sep 1 2010
09:35 PM
Level-2 Member Damitman   Well the horrible happened this weekend. We had a weekend of bad weather here in Louisiana and I swamped my boat at the dock. I plan on raising it this weekend once I get my head together. My c.....
7 Responses.... Open/CloseView ALL
Sep 3 2010
02:51 AM
#4 Level-2 Member Damitman   Guys having trouble finding the part # for the 4 bt starter. I have a starter from a 5.9 in the back of my shed looks close will it work? If not were can I find the part # for this starter.
Sep 3 2010
03:26 AM
#5 Level-3 Member Ski in NC   I´m guessing, but the 6b starter should fit. Should be the same flywheel and housing. Edit: If the 6b starter is from a dodge truck, that is probably different.
Sep 3 2010
08:59 AM
#6 Level-1 Member Ali   Damitman, very bad luck with that storm. Maybe a bit of help regarding removal of water. Metylated spirit sprayed on or run thru the engine will help to absorb water and carry it out. Most important .....
Sep 6 2010
03:22 AM
#7 Level-2 Member Damitman   OK, Followed all of instruction above and to my amazement the motor started right up literally!!!! I was amazed by the amount of water and gunk that got in the cylinders. It is currently running smo.....

Cummins:B Series Leaking oil VIEW/REPLY   Notify me of any new messages to this topic. 7  Sun Sep 5 10 2:12 PM
Aug 24 2010
04:59 PM
Level-1 Member Timjet   I have a ´97 330 6BTA M-3 Diamond series serial #: 45504241 on a boat I just bought and noticed a oil leak somewhere near the aft underneath portion of the engine. The leak is not noticeable at low rp.....
7 Responses....
Sep 2 2010
04:43 PM
#1 Level-3 Member Brad K.   First I would 100% your your oil level... I suggest reading the article from this web site: http://boatdiesel.com/Articles/Articles.cfm?P=20080810_Introduction.cfm&Y=2008 Many times problems .....
Sep 2 2010
09:13 PM
#2 Level-1 Member Maka Koa   Ditto, Overfilling those engines can cause it to puke out of the breather tube. Read the article twice!
Sep 4 2010
01:08 PM
#3 Level-1 Member Timjet   Thanks guys for your input. I don´t think it´s over filling. This problem is recent and no oil has been added until the problem surfaced. I checked the oil last week after seeing oil in the bilge .....
Sep 4 2010
04:52 PM
#4 Forums Moderator Tony Athens   Tim, Do you have a Walker AirSep? Get some good pics of the engines and where the leak is.. It sounds like the long cover plate behind the aftercooler.. Any excess crankcase pressure and it will le.....
Sep 4 2010
07:02 PM
#5 Level-1 Member Timjet   Tony, I do have the Walker AirSep´s. I re-read the article and understand that you recommend running the engine with the oil level about half way between L and F. It is now at the F level becau.....
Sep 5 2010
12:07 AM
#6 Forums Moderator Tony Athens   Tim, 99%, your issue is directly related to the Walker Airsep.. I cannot post much right now ( the forum has a glitch) , BUT try this search.. Go back 3-4 years.. Type in "walker" .....
Sep 5 2010
02:12 PM
#7 Level-1 Member Timjet   Thanks Tony, Looks like they got the forum glitch fixed. I´ll get more pictures and post next weekend. I´ll get detailed pics of the air-seps, and the tubes leading to and from them, and where the.....

Cummins:B Series Where is the starter? VIEW/REPLY   Notify me of any new messages to this topic. 6  Sun Sep 5 10 1:12 PM
Sep 3 2010
09:35 PM
Level-1 Member Mike Thomas   I am running for the dumb-ass award. A month ago I put 50 gallons of water in my diesel tank thinking I was filling the water tank. Fixing that was quite a lesson. Now, the condensation from my cold a.....
6 Responses....
Sep 3 2010
09:40 PM
#1 Level-3 Member Ski in NC   Right hand side of engine, with front being the belt end. Starter is on back of engine under exhaust manifold and heat exchanger.
Sep 4 2010
01:18 AM
#2 Level-1 Member David M   We had a customer fill both his engines up with water threw the valve cover oil fill cap. thinking he was topping off the coolant. it ran for 30min then locked up. we had to flip the motors over and p.....
Sep 4 2010
03:04 PM
#3 Level-1 Member Mike Thomas   Hehe, somehow the consolation prize isn´t all that tasty.
Sep 5 2010
12:16 AM
#4 Level-1 Member Jimbob   Mike, don´t feel so bad. i know of instance when an owner had a fuel attentant dump gasoline into the rod holders that lead between the hull and interior mold that was filled with flotation fill.....
Sep 5 2010
03:23 AM
#5 Level-1 Member Tom G   A few summers ago, one of my friends had his boat washed and tanks filled before he arrived for 4th of July weekend. The gas jockey filled up the holding tank. For the next day or two he could not fig.....
Sep 5 2010
01:12 PM
#6 Level-1 Member Fishn2day   Woof...no matter how bad you think you´ve got it, someone else has it worse. Happy Labor Day....

Cummins:B Series Water in the cylinders VIEW/REPLY   Notify me of any new messages to this topic. 8  Sun Sep 5 10 12:20 PM
Aug 23 2010
03:24 PM
Level-1 Member Capt Mike   I recently had a slight overheat problem on one of my 370b t/a´s. The engine was making steam and under the advise given here, I tackled the raw water system. I found some obstructions in the afterc.....
8 Responses.... Open/CloseView ALL
Sep 5 2010
04:03 AM
#7 Level-1 Member Capt Mike   So here´s the end of the story...I removed the aftercooler, cleaned it, reset the orings and brought it to Cummins NE for a preasure test. The unit leaked. They took off the end caps and reseated th.....
Sep 5 2010
12:20 PM
#8 Forums Moderator Tony Athens   All you had to do was read the aftercooler articles of the homepage in the article section to "see" how it is done.. Tony

Cummins:B Series Alternator Terminals VIEW/REPLY Includes Attachments Notify me of any new messages to this topic. 2  Sun Sep 5 10 2:46 AM
Sep 4 2010
09:56 PM
Level-1 Member Maka Koa   Just want to make sure I´m correct here. The attached picture shows the back of my alternator. I am trying to test it´s output. These are the Positive (has a boot) & Negative terminals, correct? I.....
Open Topic to View Attachments
2 Responses....
Sep 4 2010
11:29 PM
#1 Forums Moderator Tony Athens   Chris, I can´t see your attachment as the forum has some kind of glitch right now..... In fact, I can´t seem to post attachments myself.. But, I am "in town" so to say (Longboat Key.....
Sep 5 2010
02:46 AM
#2 Level-1 Member Maka Koa   Deal

Cummins:B Series Turbo Problem VIEW/REPLY Includes Attachments Notify me of any new messages to this topic. 2  Sat Sep 4 10 9:46 PM
Sep 4 2010
07:27 PM
Level-1 Member Capt. Mike   I have 2 6BTA 5.9 Mk3 370 Hp diamond series CPL 2208 with about 2000 hrs on them. I am seeing some smudge accumulating on one engine turbo on the cold side by the snap ring. I have the Seaboard brea.....
Open Topic to View Attachments Open Topic to View Attachments
2 Responses....
Sep 4 2010
09:15 PM
#1 Level-2 Member Captjohn   Obvious questions first, is the clamp seated properly and is it tight (it´s not cracked?)? Now for the hard one, when was the last time the aftercooler was cleaned out? If it´s clogged you´ll build up.....
Sep 4 2010
09:46 PM
#2 Level-1 Member Capt. Mike   snap ring is tight and not broken in anyway, the seal seems to be as tight as ever. The aftercooler, about 15 months ago, both were replaced with new cores..... thanks for the comments.

Cummins:B Series Low Power - Fuel pressure VIEW/REPLY   Notify me of any new messages to this topic. 4  Sat Sep 4 10 4:43 PM
Aug 16 2010
08:15 PM
Level-1 Member ScubaPete   I´m still working through troubleshooting the low RPM´s/low power on my 6BTA-M3 330´s (CPL 1975). As per Tony´s articles and numerous other posts, I have: ---installed a clear loop in the incoming f.....
4 Responses.... Open/CloseView ALL
Sep 4 2010
04:31 PM
#2 Level-1 Member ScubaPete   Trying to remove the plug on the fuel filter manifold so I can attach a hose to run the pressure gauge.... the plug has a square drive recess (like an allen wrench hex socket -- but square). A 3/8&quo.....
Sep 4 2010
04:33 PM
#3 Level-1 Member Jay Leonard   I would grind down an old drive. 10 minutes you´ll have a tool.
Sep 4 2010
04:43 PM
#4 Level-1 Member ScubaPete   I figured that´s what I would have to do, it just seems like if there is a square drive plug (and there are others on the engines), that there would be a tool available for the job.

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Please keep content technical, on-topic and friendly. Postings do not necessarily reflect the view of Boatdiesel.com. Page of 67 >>
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