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Message board > Engines > 450hp MAN engine electronics control box in Hardy 42
Message 3 of 3
Posted by member Nick Sills on Sunday 17 April 2022
Thanks Jon,
Yes me and Sue are thoroughly enjoying KAYOS and I have got to grips with operating her (and understanding what every thing is, does and how it is supposed to function!) - but since this is my first boat it has been a steep learning curve - although I have spent nearly 40 years at sea (with some 15 years under it) it's the first time I haven't got a crew to operate the vessel!!
I have had a very competent electronics engineer look at the battery replacement problem but he has told me the fix requires "factory equipment" to separate and re-solder the two halves of the duplex PCB and them to reprogram them - it cannot be done by hand. Boenings are basically the only option. Modifying the boards once split with and external battery system is also apparently extremely costly, SNAFU!!
Thanks for your comments Jon.
Nick and Sue Sills
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Message 2 of 3
Posted by member jon on Wednesday 13 April 2022
Hi
Apart from your problem I hope you are enjoying Kayos. Over the years many engine configurations have been used by Hardy's, some costing more to maintain than others.! The original mechanical Yanmar fitment engines only required a battery to start them up.
I have no idea of what the actual circuit board looks like, but If you could find someone to remove the original batteries it may be a simple task to wire the battery terminals to an external battery in a suitable container such that they could be replaced more readily.
As an aside a Hardy boat should last for years whereas engines etc. change more frequently . Getting spares in 10 years time could become a problem, particularly as regards specialised electronic components which are updated frequently.
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Message 1 of 3
Posted by member Nick Sills on Saturday 2 April 2022
Hi Guys,
My Hardy 42 KAYOS has two 450 hp MAN engines.,
The two engine ECU's boxes in the engine room each contain a duplex PCB that contains a battery sandwiched between the two electronic boards.
The function of the battery is to power the temperature, voltage and oil pressure analogue gauges on the saloon and fly bridge panels. The two adjacent analogue RPM gauges are unaffected and function correctly.
Although the engines operate correctly and there are fault/out of range warning lights covering all operations of the engines, it is uncomfortable to have no means of forecasting an imminent failure - say engine oil pressure falling for instance, prior to a failure.
It appears that the battery (a £3 item) can be replaced (life about 4-5 years) for £750 per board and 3 weeks turn around by MAN/BOENING in Germany.
Spending £1,500 every 4-5 years to replace the £3 batteries and enable the 3 small gauges to work seems a pretty idiotic state of affairs.
MAN say this is because to split the duplex PCB boards and replace the tiny battery means un-soldering the whole board and after replacing the battery re-soldering the whole board!!!
Has any Hardy 42 owner with MAN engines found an alternative means of replacing the batteries?? I asked about having two new boards made up with easily replaceable batteries and was quoted £7,000. Help!
Hopefully yours, Nick and Sue Sills.
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