Our original fresh water pump looked just like one of those pumps.
It would only pop the breaker when I was soaped up. My wife could
take a shower with no issues. But I never could. I would have to
wipe the soap off, get dressed, go out in the cockpit and open the
engine hatch to reset the breaker. Then go back and rinse off.
It turns out that the motor was going bad, so I changed it out to
an all in one diaphram pump like they use on deck washdown pumps.
The breaker was a 10 amp and the old pump was supposed to run at
7 amps. The new one runs at 3 amps. No issues with a new one.
I just hope the new one last 26 years like the old one did.