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Old 01-04-2017, 08:16 PM   #21
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The guys from the dealer have just left the boat and its running sweet again. A few days ago I did find a second fault code (1485.12) that translated to 'Pump Power Relay Fault'. And that was the answer. A relay with intermittent failure - wiggling would make it connect or disconnect, so a mechanical failure from one or more of the terminals in the ice cube itself.

On the port engine the relay was mounted to the engine but the connecting wires were hanging down from it at 90°. On the starboard engine the relay is cable tied to the wiring harness. The mechanic thinks the port relay failed because of vibration, so the new relay is cable tied in place, not hard mounted. The mech said it was the first one he had ever replaced, so it would appear that failure is rare. But I am getting a spare anyway.

I'm relieved it was that simple, but wish I had found the second fault code earlier as I did have a Hella relay on board that would have worked fine as a 'get home'. The experience has convinced me that two engines are very good to have. It need not be twins, I would be relaxed about one big one and a wing engine that could drive the boat at 5kn or so.
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Old 01-04-2017, 08:54 PM   #22
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Excellent outcome.
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Old 01-04-2017, 09:01 PM   #23
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So will you stock some of these electrical parts as spares now? Stock a spare ECU?
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Old 01-04-2017, 09:38 PM   #24
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So will you stock some of these electrical parts as spares now? Stock a spare ECU?


ECU would be the last thing I would ever keep as a spare as there are a million other things to go wrong before a ECU give problems
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Old 01-04-2017, 09:41 PM   #25
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Thankfully, my 2010 JD4045 has no electronics.
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Old 01-04-2017, 09:43 PM   #26
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Good to hear, Brian. Glad you back up and running fine. Thanks for the update!
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Old 01-04-2017, 09:58 PM   #27
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Thankfully, my 2010 JD4045 has no electronics.
Right, and it's a good thing mechanical devices never fail
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Old 01-04-2017, 10:10 PM   #28
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Right, and it's a good thing mechanical devices never fail

Agree mechanical devices do fail but chatting to the local marine mechanic its the electrics on the modern diesels that cause 80% /90% of the problems
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Old 01-04-2017, 11:28 PM   #29
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So will you stock some of these electrical parts as spares now? Stock a spare ECU?
I have about 10 Hella relays as part of the electrical system, rated at 40A. I carry 2 spares for those. The engine Pump Power Relay is also 40A, but no idea whether it has other specs such as temperature. I'm using a Hella one until I get a couple of John Deere relays - one to use and one as a spare. The relay failure was a low probability event but spares are low cost.

But no spare ECU. Or injector pump. AFAIK they are low probability failures. Not concerned about that, I've got two engines! What would I do if going somewhere really remote or crossing an ocean? Maybe talk to the dealer about a reasonable spares inventory based on their statistics on failures. And carry a satellite phone!
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