March Liquid cooled pump
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Here is an example of a March liquid cooled pump
I had the pump in my hands in St Maarten. It is totally encapsulated in what appears to be some form of epoxy and NOT PAINT and there is no way for it to rust.
There are 2 copper pipes coming from the pump section to cool the motor. I would however get the next size larger to get maximum water volume.
Kimberlite Amel Super Maramu #376
I believe this is the wat to go.
From: amelyachtowners@... [mailto:amelyachtowners@...]
Sent: Saturday, January 12, 2019 11:27 AM
Subject: Re: [Amel Yacht Owners] march pump
I was curious and looked at the March info. I believe the 'AC' designation refers to an open style motor that should not be exposed to the possibility of water getting on the motor. The 'CP' designator is an open drip proof motor that would tolerate exposure to some drippage (?) from above. They also have TEFC motors available for some direct exposure to water. However, I think all these motors except the 'LC' submersible variety are standard carbon steel motor housings with some form of a painted finish that apparently does not tolerate a salt air or humid environment i.e. they all will show surface rust at some time. Good luck with your preventative maintenance project.
Brass Ring A54