I tend to think its electronics too but not sure how the voltage drop impacts a diesel. I would understand with a gas engine.
Each engine has its own battery and I swapped the batteries to rule out a bad battery but the problem persisted the same way. I am suspicious about what is going on with the way the battery isolation switches are set up. Starboard battery serves both the engine and the generator Port Battery serves the port engine and DC equipment(house).
Down the road, I intend to install a separate generator battery isolated from the engine starter batteries. Also considering a separate house battery or combine with the generator starter.
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02-15-2019 08:25 AM #11Registered Member
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Re: Troubleshooting stalling Detroit Diesel 6V92
Hans
1996 Hatteras 43SXB
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02-15-2019 08:28 AM #12Registered Member
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- May 2018
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Re: Troubleshooting stalling Detroit Diesel 6V92
I added two extra batteries to the two that came OEM. I was not satisfied with the original setup and its starting capacity.
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Re: Troubleshooting stalling Detroit Diesel 6V92
Pascal
Miami, FL
1970 53 MY #325 Cummins 6CTAs
2014 26' gaff rigged sloop
2007 Sandbarhopper 13
12' Westphal Cat boat
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02-15-2019 10:27 AM #15
Re: Troubleshooting stalling Detroit Diesel 6V92
Not sure if the question was answered, but I believe we're not taking about an electronic engine here.
A mechanical diesel would NOT stall if you ripped every wire off it there is. AFAIK these mechanicals do NOT have low oil pressure/overheat shutoffs. (boatsb can confirm this) The only way you can kill them is to take away their air or fuel.
That said.... to normally shut it down IS to take away their fuel. There's two mo's. A "stop" button which activates the shutoff via a solenoid (relay) or it's wired into the ignition and when you turn off the key the engine stops. I believe this shutoff needs electricity to stay open (ie it's "normally closed") and gets this from the ignition. Find it, and get your multi meter out. A serious voltage drop COULD cause it to slam shut.
Other than that I'd be looking at fuel supply.
These things are a methodical process of elimination. Get the engine fuel that is in no way affected by what the other does and see what happens. Slowly work your way back through the system.1978 53' Motor Yacht "LADY KAY V"
Hull number 524
Chesapeake Bay
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Re: Troubleshooting stalling Detroit Diesel 6V92
I know there was a 43 out there with DDEC's. If so, voltage could be an issue for the ECM.
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Re: Troubleshooting stalling Detroit Diesel 6V92
Pascal
Miami, FL
1970 53 MY #325 Cummins 6CTAs
2014 26' gaff rigged sloop
2007 Sandbarhopper 13
12' Westphal Cat boat
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Re: Troubleshooting stalling Detroit Diesel 6V92
I love a good mystery. Is this a DDEC engine? It sure sounds electrical..there is enough primed fuel in the engine and filters for it to run quite a while, even if new fuel draw was blocked. And if it's not a DDEC engine, about the only electrical component is the fuel shut off solinois attached to the governor run lever. I'd have someone observe that linkage as you initiate the fail routine. If it is a DDEC engine, just know that we all love you, and bless your heart. .
Last edited by dottieshusband; 02-15-2019 at 11:33 AM.
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Re: Troubleshooting stalling Detroit Diesel 6V92
This is not fuel related. It is low voltage. This is a DDEC engine. There is nothing wrong with having DDEC, but the ECM has to have stable voltage. I would start by looking at all electrical connections and grounds. If there is a Vanner voltage regulation box, that could also be the issue.
Last edited by SKYCHENEY; 02-15-2019 at 09:40 PM.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI