For the last 2 weeks I've been working on Nordic Star's engine cooling system. The pump impellors hadn't been changed for about 250 hours. Each pump impellor had cracks and was about to let go. The hoses were looking rough and the sea water pump was leaking. I replaced the seawater pump with a new one and will get the old one rebuilt for about $75 and keep it as a spare. The fresh water pump ( Yanmar sea water pump on non FWC setups ) just needed a new impellor. That pump is 27 years old and running smooth at 1319 total engine hours. A new one is $400 but can be rebuilt for under $100. There is also a replacement freshwater pump available that is about $200 but can only be used with freshwater/antifreeze. The Sendure end caps and gaskets were oozing so they were replaced by an aftermarket equivalent ( non-Sendure ).
The Sendure freshwater cooled 2GM was the only option to get FWC in 1982.
I used non-toxic antifreeze. The area under the engine bed is damp..the core under that area was dry when the gel coat was stripped.
The Sendure freshwater cooled 2GM was the only option to get FWC in 1982.
I used non-toxic antifreeze. The area under the engine bed is damp..the core under that area was dry when the gel coat was stripped.
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