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OK, I've tested for continuity between the pump and the engine block so ground is there. I still plan to fix that but need to go buy a bigger connector ring.
However, the engine continues to have issues. I could not start it up with the choke (it's a warm day ~70F) -- closing the choke and re-trying started the engine. It ran in idle for about 15 minutes and just as I was about to repeat the fresh water flush experiment, the engine died. I've tried to restart it several times but it won't restart at the moment.
I had a multimeter on between the pump and the block and it was registering voltage but it was jumping around -- is that normal? Should it be within a consistent range and if so, what range?
The pressure gauge was also all over the place which makes me think the issue with the pressure gauge dropping to 0 during fresh water flushing was a coincidence.
Does anyone have recommendations on the next debugging steps? Thanks in advance for any ideas.
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