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Sleipner's response has been through their local distributor and support agent, who claims they are passing on responses from Sleipner. They have made several suggestions of things to check, all of which have involved many man hours of work by an experienced marine electrician. The suggestions...

Model is SRV100/185T.

Update: Stern thruster sheared again today. This was after a separate battery bank was installed for the stern thruster, proving that the advice given by the Sleipner support agent ( i.e. voltage to high) was irrelevant. Count is now 4 stern thruster couplings sheared and one bow thruster...

Update : The local "support agent" felt that the voltage as measured at the stern thruster of 11.8 volts was too high. Strange, given it is a 12 volt system and there was nothing in the Sleipner documentation about this ( the only mention of a voltage range in their documentation gives up to 16...

Update - I have heard that Sleipner are aware that there is a weakness in the couplings on these models and that multiple boats are affected. Apparently they don't have an an engineering solution yet. Another replacement coupling was installed on my yacht and yesterday I ran the thruster for...

I agree that voltage drop is nothing to do with the coupling shearing twice. Alignment has been checked and the current thinking is that it was caused by a lack of a delay in the unit when it goes from one side to the other ( which would be a product fault). The boatbuilder has been in the...

Sorry for not making it clear. Its connected to the house bank, which consists of 6 AGM batteries, with each one rated at 850CCA and 96 Amp Hour capacity.

Hello, I'm the owner of a brand new 46 foot European built yacht which has factory fitted Sleipner/Side Power retractable bow and stern thrusters. The thrusters are wired to the house battery bank ( 570 AH capacity). During commissioning the bow thruster started rapidly moving between port...