Last week went quite well but was a short one. I logged only 27.37 hours for a grand total of 244.33 hours. I started my week on Tuesday by doing coolant flushes on two Detroits. The rest of the week consisted mostly of general engine and drive services and some seawater circulation pump diagnostics. The issue we were facing was a Koler genset was throwing a low coolant (seawater) code. I got some direction pointers from two veteran mechanics but started from the bottom up anyways checking to make sure there was good flow at the thru hull, sea strainer, and all the way up to the circ pump. There was good flow up to that point. I found out the restriction was inside the fuel pump cooler. It was completely corroded shut. I learned that usually it is most efficient (and cheaper) to go through the proper diagnostics steps rather than jump to a conclusion and still have to back track in the end.
Pump bucket used for the Detroit coolant changes. Each engine had roughly seven and a half gallons of capacity.
Bad picture of the Koler genset I diagnosed.
Fuel pump cooler that was corroded shut. You can see the corrosion coming out of the barbed hose nipple.
After I drilled some of the corrosion out to create flow, I hooked up an electronic circ pump and flushed it with Barnacle Buster for a couple hours which completely dissolved all corrosion and left us observing cast aluminum that was corroded almost all the way through under the threads.
Big brother stopped by last week to get his boat launched....
Looks good Miles.
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