So while doing some winter work and wrapping up the A1 service, it looks like my stbd block heater is toast as it keeps popping the breaker. I went through my MAN repair manuals and there is nothing listed for the engine block heater. It looks like there is a plug that ties into the coolant system right before the oil cooler and then another at the front the exhaust manifold. Has anyone replaced their block heater and if so, do you know the part number and where to source it from? It seems like a very simple system but I haven't dug too deep into yet as I have had a 1000 other items I am trying to wrap up (the boat has become my social distancing home office for now). It looks like I just need to drain the coolant system, and swap in a new unit, but are there any other things I am missing in troubleshooting the problem? Thank you in advance for any help or advice!